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Water Level Summaries for DGS Index Wells

Locations of DGS Index Wells throughout Delaware
Primary Data Category:
Hydrogeology
Publication Date:
Sep 2014
Update Status:
Continually
Summary:

Groundwater levels are basic information needed for evaluating water conditions and for basic and applied research. For these efforts, water levels from various aquifers are being measured statewide. Some wells are measured for specific reasons, such as for the Coastal Aquifers Salinity Project and the Water Conditions Report, while other wells are measured so that staff can maintain long-term records of groundwater levels for evaluation of trends.

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Geography

Spatial Reference System(s)
UTM Zone 18 N NAD83 meters

Use Constraints

Please give proper credit to the Delaware Geological Survey.

Additional Notes

Below are monthly and annual summaries and statistics of Depth to Ground Water (in feet) for DGS wells with 20 or more years of data on record. These are also knows as Index wells. The following wells are included:

  • DGSID - DGS well identifier.
  • Easting, Northing - Values are in UTM 1983 coordinates, rounded to the nearest meter.
  • Altitude - Values are in NGVD 1929 elevation of land surface in feet.
  • Screen Top, Screen Bottom - Depth to top and bottom of open or screen interval in ft below land surface.
DGSIDEastingNorthingAltitudeScreen TopScreen BottomAquiferStart Date
Bc43-014464734403718330--163.5WissahickonJan 1974
Db24-18440157438899980919ColumbiaAug 1957
Ec32-0744558143774999.66586596Potomac Lower ZoneAug 1966
Hb14-124409434353665731419ColumbiaOct 1957
Mc51-0144224942998305513.218.2ColumbiaSep 1958
Qe44-014622114264453492226ColumbiaSep 1959


The following statistics are calculated for the entire period of record for each well:

  • POR = Period of Record
  • MIN = minimum value for the period of record
  • QTILE = 25th or 75th percentile value for the period of record
  • MED = median or 50th percentile value for the period of record
  • AVG = mean value for the period of record
  • MAX = maximum value for the period of record



Statistics of ground-water levels from well Bc43-01. Monthly and annual means                       
YR         JAN    FEB    MAR    APR    MAY    JUN    JUL    AUG    SEP    OCT    NOV    DEC    AVG  
------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------  
1974      25.0   27.0   25.0   24.0   26.0          30.0   31.0   30.0   32.0   32.0   27.0   28.1  
1975      25.0          24.0   24.0   24.0   24.0   21.0   27.0   30.0   27.0   28.0   28.0   25.6  
1976      24.0          26.0   26.0   26.0   28.0   30.0   31.0   33.0   34.0   32.0   32.0   29.3  
1977      33.0          32.0   25.0   28.0                        33.0   34.0   28.0   25.0   29.8  
1978      20.0   27.0          23.0   26.0   25.0   26.0                        32.0   27.0   25.7  
1979      24.0   24.2   24.0   25.0   25.0   27.0                 30.0   26.0   29.0   28.0   26.2  
1980      28.0   24.0          24.0   26.0   29.0                 33.0   35.0   35.0   35.0   29.9  
1981      36.0   29.0   32.0   30.0   27.0   29.0   31.0          32.0   32.9   33.0   30.0   31.1  
1982      22.0   26.0   25.9   25.0                 25.0   31.0   33.0   35.0   34.0   32.0   28.9  
1983      28.0          25.0   23.0   24.0   25.0   29.0          32.0   34.0   33.0   24.0   27.7  
1984      25.0   25.0   23.0   24.0   25.0   25.0   25.0   29.0          31.1   32.6          27.0  
1985      32.4   29.4   30.0   30.6   30.0   31.1   32.2   30.9   31.6   31.2   29.5   29.8   30.6  
1986      28.2   25.9   26.4   27.1   27.5   30.1   32.2   33.8   35.6   36.8   33.1   26.7   30.2  
1987      26.6   26.7   26.0   25.5   25.8   28.3   26.6   31.4   30.7   32.5   33.0   30.0   28.6  
1988      29.3   24.6   26.0   26.3   25.0   27.4   28.6   29.8   30.5   31.2   26.9   30.0   28.0  
1989      27.0   27.2   25.1   25.0   24.5   25.6   23.9   25.7   26.7   25.9   26.4   28.7   26.0  
1990      25.1   25.2   26.3   25.4   23.8   25.7   27.7   27.3   30.6   32.4   32.5   28.9   27.6  
1991      24.6   26.8   25.7   25.6   25.7   28.7   29.7   31.0   32.3   33.4   34.8   30.2   28.8  
1992      31.6   30.7   26.2   26.3   27.4   27.0   29.5   28.4   28.2   30.9   27.7   25.8   28.4  
1993      25.5   24.9   23.5   23.6   25.6   26.6   28.3   30.8   29.8   28.9   29.0   25.4   27.8  
1994      25.6   24.8   23.8   24.1   24.9   25.6   27.4   27.6   29.8   31.9   33.2   31.9   27.7  
1995      30.2   28.4   25.8   27.3   26.6   27.4   28.0   29.7   31.7   28.2   26.2   27.0   28.1  
1996      23.8   24.7   24.5   23.6   24.4   25.2   25.5   25.9   26.9   25.4   26.2   23.5   24.9  
1997      25.6   24.7   24.2   24.7   25.5   26.5   27.9   28.9   30.1   32.2   29.1   28.9   27.4  
1998      26.4   25.3   24.0   24.8   24.7   25.6   27.0   28.9   31.2   31.5   32.6          27.5  
1999      26.8   25.1   24.6   24.7   25.2   25.9   27.5   28.9   26.6   25.4   26.7   25.6   26.0  
2000      25.8   24.8   23.8   24.0   25.2   25.9   26.1   26.6   27.5   29.0   29.7   27.3   26.2  
2001      27.5   25.4   24.6   24.4   25.4   24.8   26.2   27.2   29.4   31.0   33.5   33.4   27.8  
2002      30.4   29.9   27.7   26.4   25.6   26.3   27.6   30.1   29.7   27.4   25.7   25.2   27.8  
2003      25.3   25.3   22.8   24.0   24.8   23.2   24.5   25.2   24.6   25.1   24.7   23.2   24.3  
2004      24.6   24.8   24.6   23.2   23.9   24.5   21.8   22.6   26.1   24.9   24.9   23.9   24.1  
2005      24.1   24.1   23.7   23.2   24.9   25.5   25.9   26.5   28.0   25.7   26.9   25.1   25.1  
2006      24.5   24.5   25.2   25.3   25.0   24.3   24.5   26.2   25.1   24.7   23.7   25.8   24.8  
2007      24.2   25.6   23.6   22.7   24.7   25.6   26.2                 29.1   27.4   26.0   25.2  
2008      25.2   24.5   23.7   24.5   24.2   24.9   26.5   28.6   29.4   28.5   28.0   25.5   26.1  
2009      25.5   26.5   27.5   24.7   23.9   24.0   25.3   25.2   25.3   25.9   25.3   24.1   25.3  
2010      24.3   24.3   23.0   24.0   25.3   26.5   27.0   27.4   30.2   26.0   26.7   26.7   25.9  
2011      27.5   25.4   23.1   23.5   24.3   25.3   26.4   26.0   24.0   25.4   25.8   24.4   25.1  
2012      24.6   25.1   25.3   25.8                 28.7   29.3   28.1   28.8   26.4   27.5   27.0  
2013      25.5   25.0   24.7   24.7   25.0   23.7   24.4   25.0   26.8   27.4   29.0   26.2   25.6  
2014      24.4   23.6   23.9   23.1   22.4   24.2   25.1                 28.6                 23.7  

Monthly minimums, quartiles, averages, and maximums for period of record                            
minimum   20.0   22.3   20.1   18.0   17.9   21.5   18.9   18.5   21.6   23.5   23.7   20.9   17.9  

25th      24.6   24.7   23.9   24.0   24.6   25.0   25.4   26.5   27.5   26.0   26.6   25.4   25.6  

median    25.5   25.2   24.7   24.7   25.0   25.6   26.8   28.6   30.0   29.1   29.0   27.0   27.4  

average   26.4   25.8   25.3   24.9   25.3   26.1   27.0   28.3   29.5   29.6   29.3   27.5   27.1  

75th      27.5   26.7   26.0   25.5   25.9   27.0   28.5   30.1   31.6   32.2   32.6   29.5   28.1  

maximum   36.0   32.4   32.0   31.0   30.3   31.4   32.2   34.2   36.0   36.9   35.7   35.0   36.9  

****************************                                                                        

Statistics of ground-water levels from well Db24-18 (permit 96246). Monthly and annual means        
reported on  21-DEC-14                                                                              

YR         JAN    FEB    MAR    APR    MAY    JUN    JUL    AUG    SEP    OCT    NOV    DEC    AVG  
------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------  
1957                                                       13.9                 14.2          14.1  
1958              9.6           5.1    4.9                         9.9   10.8                  9.0  
1959      11.8                 11.1                               12.3          13.3          12.1  
1960                            8.4                                             11.3           9.8  
1961                            6.8                                      13.3                 10.0  
1962             13.9   11.5                               13.2   13.7   14.4          14.7   13.7  
1963             14.8   13.8   13.3   13.6   14.1   14.6   15.1   15.7   16.1   16.7          14.8  
1964      16.3   15.2   13.6   11.6   10.0   10.7          12.2   13.1   14.2   14.8   15.9   13.1  
1965      15.8   15.1   14.2   12.6          13.0   14.1          15.0   15.6   16.2   16.7   14.8  
1966      17.4   17.4   16.9   16.4          15.7   15.7          16.4   16.4   15.4   15.2   16.3  
1967      14.5          11.7    8.8    9.0    9.7   10.8                  9.0   10.0   10.6   10.8  
1968              9.2    7.7    8.6           8.9   10.0   10.9          12.7   13.9          10.2  
1969      14.2   14.2          13.6   13.6   13.9   14.6   14.7          14.6   15.0   14.9   14.3  
1970      12.9          11.5           7.6    8.7    9.4   10.7          12.3   13.6          10.9  
1971      13.4   12.8   10.3   10.3   10.5   10.9   12.0                  8.2           6.4   10.5  
1972       6.7    6.2    5.9    6.3    6.1    6.7    6.7           9.7   11.0   12.0   10.0    7.9  
1973       7.0    5.9    6.6    5.8    5.8    5.4    6.9    8.1    9.6   11.1   12.1   12.9    8.1  
1974      10.6    9.4    9.6    7.3    8.5          10.2   11.4          12.7          13.0   10.6  
1975      10.5           9.0    7.3    7.1    7.2                 10.0    9.8   10.2   10.3    8.9  
1976       9.4    8.4           9.1    9.7   11.0          12.0          13.4   12.9   13.3   11.0  
1977      13.8   14.2          14.1   13.9   14.2          13.7   14.2          15.2   14.4   14.1  
1978              9.0    6.0    7.1           7.2    8.2    7.4                                7.5  
1979       8.9           5.2    5.8           7.6          10.0           9.6                  8.2  
1980       9.4    9.7           6.9    7.7          10.6          12.1   12.9   13.9   14.6   10.9  
1981      15.1   15.6   15.5   15.1   15.5   14.0   14.0   14.2          14.7          15.2   14.9  
1982             13.6   12.7   10.9    9.6    9.6   10.0   11.1   12.6   13.0   13.5   13.5   11.8  
1983      12.5           9.4    5.6    5.1           7.4    9.8   11.7          12.9    9.2    9.3  
1984       9.4    7.7           5.5    6.0    7.6    7.5    8.9          10.5   11.6           8.5  
1985      12.5   12.6   11.9   12.7   12.9   13.5   13.8   14.2   14.7   14.9   15.3          13.5  
1986      14.5   12.4   11.8          12.3   13.1          14.2   15.0   15.5   15.7   15.0   14.1  
1987      12.6   11.4   10.7   11.0   10.9   11.6   13.0   13.9          14.3   14.8   15.1   12.4  
1988      14.4   12.6          12.3   12.1   12.2          13.2   14.5   14.9          14.9   13.5  
1989      14.4   13.7   12.1   11.1    9.7    9.2           7.4    9.9    9.9   10.8          11.0  
1990      11.6    9.7   11.0   10.0   10.1          10.0   11.0   12.6   13.5   14.1          11.3  
1991      13.8   11.7   11.1          10.7   12.0   13.2          14.0   14.4   15.2   15.2   13.1  
1992      15.2   15.3          14.3   13.8   13.9          14.5   15.0          15.4   15.3   14.7  
1993      13.4          10.5    7.4           9.1   10.2   11.9          13.8   14.4   12.7   11.6  
1994      11.6          10.0    7.8    8.1    8.9   10.4   11.4   12.3   13.4          14.2   11.0  
1995      14.1   13.6   12.8   12.8          13.4   14.1   14.5   14.9   15.3   14.6          14.1  
1996      12.7   11.3   10.8    9.0           9.5    9.8   10.2          11.4   11.1   10.6   10.8  
1997       8.9           9.5           8.9   10.3   11.7          12.9   13.5   14.4   14.8   11.1  
1998      14.7          12.8   10.5   10.0    9.7   10.9          12.6   13.6   14.2          12.3  
1999      15.0   14.7          12.9   12.6   12.9   13.3   13.9   13.9          13.6   13.9   13.7  
2000      13.5   13.2   12.2    9.5    9.6   11.0   11.2   11.9   12.8   13.0   13.5   14.0   12.2  
2001      14.1   13.2   12.6   10.8   11.0   10.8   10.7          12.5   13.1   13.9   14.6   12.3  
2002      15.1   15.3   15.5   15.3   15.1   15.0   14.9   15.4   15.6   15.9   15.6   14.4   15.3  
2003      12.2   11.6    9.4    7.9    7.3    6.8    6.9    8.1    8.5    8.3    8.1    7.2    8.5  
2004       8.0    8.8    9.4    8.6    8.5    8.6    8.3    8.0    9.2    8.8    9.5    8.6    8.7  
2005       8.7    8.8    8.8    7.5    8.9   10.1   11.1   12.1   13.0   13.6   13.8   13.9   10.9  
2006      12.9   11.7   11.5   11.4   11.6   12.2   12.5   12.6   12.9   13.0   12.0   11.3   12.1  
2007      11.3   11.6   10.7    9.7    9.4   10.5   11.4   12.4   13.2   14.3   14.7   14.9   11.8  
2008      14.2   13.5   12.3   11.8   11.9   11.7   12.3   12.9   13.6   14.3   14.9   15.1   13.2  
2009      14.5   14.2   14.3   14.0   12.8   12.2   11.8   12.2   12.2   12.2   11.5   10.4   12.7  
2010       9.1    8.9    7.6    7.5    8.9   10.1   11.1   12.0   13.0   13.4   13.7   14.0   10.8  
2011      14.2   13.7   12.3   11.4   11.1   11.6   12.3   13.0   11.8   11.5   11.9   11.1   12.1  
2012      10.5   10.7   11.0   11.6   12.2   12.9   13.6   14.2   14.8   15.2   15.2   15.4   13.1  
2013      15.0   14.2   13.5   13.0   13.0   12.4   10.7   10.9   11.5   12.4   13.2   13.5   12.8  
2014      12.4   11.2   10.2    9.7    8.9    9.2   11.4   12.1   12.7   13.7   14.3   14.0   10.9  

minimum    6.7    5.9    5.2    5.1    4.7    5.4    6.2    7.4    8.0    7.4    7.8    6.4    4.7  

25th      10.6    9.7    9.5    7.5    8.5    9.2   10.0   10.9   12.1   11.7   12.1   11.7   10.6  

median    12.9   12.6   11.1   10.2   10.0   10.9   11.1   12.1   12.9   13.4   13.9   14.0   11.8  

average   12.5   12.0   11.0   10.1   10.1   10.8   11.2   12.0   12.8   12.9   13.5   13.2   11.8  

75th      14.4   14.2   12.6   12.4   12.2   12.9   13.1   13.9   14.2   14.4   14.9   14.9   13.4  

maximum   17.4   17.4   16.9   16.4   15.5   15.7   15.7   15.5   16.4   16.4   16.7   16.7   17.4  

****************************                                                                        

Statistics of ground-water levels from well Ec32-07. Monthly and annual means                       
YR         JAN    FEB    MAR    APR    MAY    JUN    JUL    AUG    SEP    OCT    NOV    DEC    AVG  
------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------  
1966                                                       41.0                               41.0  
1967                                                       49.5   51.8   38.8                 46.7  
1968                           53.3   53.6   46.1          41.4   40.0   39.7   41.8   42.2   44.8  
1969             42.6   40.8          39.7   43.8   50.0                 33.6   49.5   51.7   45.1  
1970             63.6   65.9   66.8          55.3   59.9          72.3          58.3          63.2  
1971                                  47.7                        55.0          51.5   52.2   51.6  
1972                    69.1                 57.7                               63.4   66.7   64.2  
1973             78.3                                             55.5                        66.9  
1974      71.1                                      64.4                               69.9   68.5  
1975                                  64.1   71.1          74.9   67.0                 75.5   70.5  
1976                           84.9          82.0   78.4                 83.7                 82.3  
1977      87.7                        80.3   82.3                                      93.0   85.8  
1978                                  89.1                 81.8                               85.5  
1979      86.1                                                                                86.1  
1980             90.1          79.6   69.7          83.9          90.1                        82.7  
1981      95.2   95.4   95.4          82.8          85.5   83.3   85.1   83.0          85.2   87.6  
1982                    90.9   86.0   87.2          88.1          88.0   91.8          91.2   88.9  
1983      91.1          79.1   86.2   88.7          93.1   91.8   92.4          86.9   88.1   88.7  
1984             92.4          87.8   84.2   83.7   84.0                        81.7          85.4  
1985      87.8   89.5   84.0   79.8          85.9          87.0   85.8   86.2   77.7          84.5  
1986      85.8   88.7   83.6          82.1   87.0          89.3          85.6          86.8   86.6  
1987      85.7   83.8          81.5   77.5   75.2          75.3   91.0   89.4          90.0   83.9  
1988      93.8   95.3   89.5          89.9   89.3          89.7   92.5         100.6   99.9   93.9  
1989     102.1  103.4  102.8   92.0   91.1   99.0                 97.9   96.6   91.0          97.4  
1990      96.9  100.2   99.3   98.9   99.2                 99.9  103.2   91.4   93.3          98.0  
1991      98.4  100.5                 95.7   99.9                100.8  100.4   95.1          98.2  
1992      95.9   98.9          99.4   98.5                100.8  100.8          82.4          96.8  
1993      83.2          94.3   87.5          79.2   81.0   94.9                 96.1   98.3   88.5  
1994      96.2   99.5          98.6   98.1   99.3   99.5   95.7   86.7   92.0          89.7   94.7  
1995      91.5          99.1   98.5   93.5   97.2   95.8         102.7  103.1  106.3          98.4  
1996     109.4  109.9  109.0  108.3         108.4   93.0  100.3          98.3                104.0  
1997     107.9  109.2                104.2  109.4  110.6         109.0         113.1  106.7  108.3  
1998      99.8                107.0         105.6  108.3         108.5         110.4  108.6  107.2  
1999      99.4  110.3         109.2  107.7  107.9  109.2  110.3  105.8         101.4  107.6  107.0  
2000     105.3         109.1         109.0  104.7  100.2         104.5  105.0  102.1  104.8  105.0  
2001     107.1  109.4         112.4  111.0  113.4  114.0  114.1  113.5  112.9  114.6  108.5  111.9  
2002     100.9   98.6  104.4  107.0   97.5  104.4  105.7  106.9  111.0  113.8         112.3  105.7  
2003     113.4         112.6  112.6  112.5  111.3  110.9  109.2  108.3  109.4  107.0         110.7  
2004     110.4  112.7  111.8  109.4  110.8  108.1         104.6   99.3          97.5   98.0  106.2  
2005     104.4   97.1  105.4  109.1  112.8  104.1  108.1  111.9  111.8  107.9  110.0  111.3  107.6  
2006     111.3         113.0  110.7  110.7  114.0  117.7  119.9  122.2  118.9  116.9  120.5  116.0  
2007     121.8  119.1  114.2  112.5  111.3  113.8  115.9  116.4  118.9  120.9  120.2  122.0  117.2  
2008     119.5  120.0  119.1  110.8   97.6   96.4   97.6  100.5  109.1   99.3   89.5   95.5  103.6  
2009      98.0   95.7   92.6   87.5   85.5   85.4   86.3   93.5  101.9  108.4   97.9   88.8   93.4  
2010      99.0   95.3   92.1   86.5   82.8   77.8   78.0   80.2   81.7   82.3   86.2   81.0   85.5  
2011      76.5   74.3   71.1   68.2   66.9   69.2   80.6   85.9   88.6   92.7   96.2   99.1   81.3  
2012      98.8  101.2  103.3  101.3  102.3  103.7  106.7  119.4  123.9  119.0  118.1         108.2  
2013                          114.6  114.2  114.0  111.3  109.6  108.3  107.8                111.4  
2014                          111.2  111.9  112.8  114.5  115.7  116.3  116.6                114.2  

Monthly minimums, quartiles, averages, and maximums for period of record                            
minimum   71.1   41.7   40.8   53.3   39.7   43.8   46.5   41.0   40.0   33.6   41.8   42.2   33.6  

25th      91.1   90.0   85.4   86.2   82.8   81.3   83.9   84.6   86.7   86.2   83.3   85.2   82.7  

median    98.4   97.8   97.3   98.7   93.5   98.1   96.7   95.7  100.8   98.3   96.1   93.0   88.9  

average   97.9   95.5   94.3   95.6   90.8   91.6   94.4   93.4   94.6   94.1   91.9   91.2   89.0  

75th     105.3  104.8  108.1  109.3  107.7  107.9  109.0  109.4  108.5  108.4  106.8  106.7  105.7  

maximum  121.8  120.6  119.6  118.2  114.7  114.4  117.7  124.9  127.0  120.9  120.2  122.0  127.0  

****************************                                                                        

Statistics of ground-water levels from well Hb14-12 (permit 211615). Monthly and annual means       
YR         JAN    FEB    MAR    APR    MAY    JUN    JUL    AUG    SEP    OCT    NOV    DEC    AVG  
------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------  
1957                                                                      9.0    8.9           9.0  
1958              4.5           1.5    2.2                         6.0    6.8    6.5           5.2  
1959       6.7                  6.5    6.9                         9.1           9.6           7.8  
1960                            6.2                                                            6.2  
1961                            3.5                                       8.2                  5.8  
1962                                                        8.1    8.8    9.3    9.6    9.7    9.1  
1963              9.1    4.4    7.7    8.1    8.4    8.9    9.3    9.8   10.2   10.3           8.6  
1964       8.7    7.9    5.8    5.1    5.0    6.7           8.0    8.6    9.4    9.8   10.2    7.5  
1965       9.8           8.2    7.5           8.1           9.3   10.0   10.5   10.9   11.1    9.5  
1966      11.4   11.6   11.0   11.1          11.9   11.6   12.0   11.9   11.9   11.0   11.2   11.5  
1967      10.7    9.6    7.7    7.5           8.2                         8.9    9.3    9.1    8.9  
1968              7.5    5.8    6.7           6.3    7.1    8.0           8.9    9.9   10.0    8.0  
1969      10.2    9.7    8.9           8.8    9.1    9.7    7.4           8.2    8.5    8.3    9.0  
1970       6.2           6.1           4.1    5.7    5.9    7.1           8.4    9.3           6.5  
1971       8.7    8.1    6.5    6.7    7.0    7.2    8.1                  4.2           3.2    6.6  
1972       3.7    3.3    3.2    3.9    3.8    5.0    3.2           6.3    7.0    6.8    4.2    4.6  
1973       3.2    1.7    3.0    1.5    3.7    3.8    5.6    6.4    7.3    8.1    8.5    8.7    5.1  
1974       7.2    6.6    6.9    5.1    6.1           6.5    7.5           7.4           7.4    6.8  
1975       5.9    5.3           4.4    4.3           4.6    5.0    6.6    5.7    5.5    6.1    5.3  
1976       4.8    4.2           5.6    6.5    7.4           8.2    9.0           9.0    9.2    7.1  
1977       9.3    9.4    8.5           8.7    9.4          10.0    9.1          10.4    9.4    9.3  
1978              5.6           3.4    3.3    5.1           6.2           7.3    7.0    7.8    5.7  
1979       4.7           2.7    3.8           5.1    6.1    6.0           5.6    4.8    5.9    5.0  
1980       5.8    6.3           3.1    4.2    5.0    5.9    6.3    7.5    8.0           8.7    6.1  
1981       9.1    8.8           9.0    8.7    8.8    9.0    9.4    9.8   10.1   10.4   10.5    9.4  
1982      10.2    9.3    7.8    5.8    6.5    5.7    6.1    7.4    8.5    9.1    9.2    8.5    7.8  
1983       8.3    7.3    4.9    2.9    2.7    3.1    5.0    6.7    7.7    8.4    8.2    5.4    5.6  
1984       5.7    5.2    4.2    2.7    3.6    5.0    5.4    6.6    7.7    8.1    8.4    8.0    5.5  
1985       8.2    7.7    7.6    7.8    7.1    7.3    7.3    8.2    8.6    7.9    8.1    7.7    7.7  
1986       7.6    5.2    5.7           6.7    7.7    8.4    8.8    9.4    9.9   10.0    9.3    8.1  
1987       6.6    5.6    4.3    5.2    5.8    6.7    7.3    8.7    9.0    9.7   10.2   10.4    7.5  
1988      10.1    8.4    7.9    7.9    6.8    7.2    7.6    8.0    8.8    9.4    9.6    8.9    8.4  
1989       8.5    7.8    5.9    4.5    2.5    3.0    2.0    2.4    4.6    4.2    4.3    5.2    4.5  
1990       4.8    4.8    5.4    4.7    3.6    4.2    5.2    6.5    7.4    7.9    8.5    8.7    6.0  
1991       6.5    6.4    6.2    5.6    6.1    6.4    7.9    8.4    8.9    9.5    9.9   10.0    7.6  
1992      10.0   10.0    9.5    8.7    8.3    8.1    8.5    8.7    8.8    8.7    8.9    7.5    8.9  
1993       6.5    6.0    3.1    2.4    4.0    5.5    6.8    8.0           9.1    9.7    9.9    6.0  
1994       9.6    8.5    6.3    3.3    4.9    5.9    6.4    6.9    6.6    7.7           8.4    6.8  
1995       8.0    7.6           6.7    7.2    7.8    8.4           9.3    9.1    8.5    8.3    8.1  
1996       6.7    5.4    5.2    4.2           4.9    3.2    4.4           5.7           5.0    5.0  
1997       3.3    3.2    2.9           4.2    6.0    7.4           8.6           9.4    9.2    6.0  
1998       8.4           4.5    3.5    3.9    5.4    6.6           8.1           8.7           6.7  
1999       9.5    8.8           7.8    8.1    8.8   10.0    9.7    8.3           8.0    7.9    8.8  
2000       7.4           6.2    4.2    4.5    6.4    6.5    6.1    6.3    5.8    6.7    7.2    6.2  
2001       7.4    5.4    3.8    4.2    5.8    5.7    6.6    7.3    8.0    8.7    9.2    9.8    6.8  
2002      10.0   10.1   10.2    9.6    9.3    8.9    9.1   10.0   10.4   10.6   10.0    7.7    9.6  
2003       5.5    4.0    3.1    3.1    4.7    1.5    3.0    5.0    4.9    5.6    4.6    3.5    4.0  
2004       4.0    4.4    5.0    4.6    4.7    5.3    4.2    5.4    6.5    6.8    6.2    5.2    5.2  
2005       5.4    4.5    4.4    2.7    5.1    6.0    6.2    7.0    7.5    8.1    8.1    7.7    7.7  
2006       6.4    6.0    6.1    6.7    7.1    7.6    5.6    6.2    6.9    7.1    6.0    5.5    6.2  
2007       4.4    5.2    4.4    3.3    4.8    6.1    6.8    8.9    6.5    9.1    8.9    8.8    6.0  
2008       9.2    8.3    7.0    6.9    6.0    6.0    7.1    8.1    9.0    9.6   10.2   10.4    8.2  
2009       9.5    9.2    9.2    8.7    8.0    7.8    7.9    8.4    8.4    8.4    7.2    4.2    8.1  
2010       3.1    2.9    1.8    2.5    4.7    6.0    7.2    7.9    8.7    8.7    8.8    8.8    6.2  
2011       8.8    7.7    6.4    5.9    6.2    7.1    8.0    7.5    3.2    4.0    4.4    3.0    6.0  
2012       3.9    4.7    4.8    5.8    6.4    7.1    7.9    8.6    9.2    9.7    8.8    8.7    7.2  
2013       7.8    7.2    6.6    6.3    6.8    6.6    4.8    3.2    5.4    6.6    7.4    6.9    6.3  
2014       5.3    4.0    3.2    3.2    3.3    4.4    5.5    6.8    7.8    8.5    8.7    7.7    4.2  

Monthly minimums, quartiles, averages, and maximums for period of record                            
minimum    2.1     .9     .7    1.3    1.7    1.5    2.0    1.8    2.5    3.2    3.5    1.7     .7  

25th       5.5    5.1    4.4    3.4    4.1    5.3    5.6    6.4    6.9    7.2    7.7    7.0    6.0  

median     7.4    6.5    5.8    5.1    5.8    6.3    6.7    7.5    8.4    8.4    8.8    8.4    6.8  

average    7.3    6.7    5.8    5.3    5.6    6.4    6.7    7.4    8.0    8.1    8.4    7.9    7.0  

75th       9.2    8.4    7.0    6.7    6.9    7.7    7.9    8.5    9.0    9.2    9.7    9.3    8.1  

maximum   11.4   11.6   11.0   11.1    9.3   11.9   11.6   12.0   11.9   11.9   11.0   11.2   12.0  

****************************                                                                        

Statistics of ground-water levels from well Mc51-01 (permit 178923). Monthly and annual means       
YR         JAN    FEB    MAR    APR    MAY    JUN    JUL    AUG    SEP    OCT    NOV    DEC    AVG  
------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------  
1958                                                               6.0          10.9           8.4  
1959      11.2                 10.9   11.1                         9.6           8.9          10.3  
1960                            7.3    9.2                                      10.7           9.1  
1961                            7.0                                      13.4                 10.2  
1962                                                       13.0   13.5   14.0   14.5          13.7  
1963      14.1   13.0    9.8   10.9          11.1   14.3   12.4   13.1   13.6   13.3          12.6  
1964      11.0    8.1    6.6    7.2    8.5   10.2          12.9   13.5   14.1   14.6   14.7   10.8  
1965      14.2   12.1   11.9   10.2          11.5   12.9   13.3   13.7   14.1   14.3   14.7   13.0  
1966      14.9          13.8          13.0   11.2          12.6          14.0   12.8   13.3   13.1  
1967      12.5          10.5   10.4   10.4   10.6           5.5    6.9          10.0    9.3    9.8  
1968              8.8    7.7    9.7   10.5   10.7   11.6   12.7          13.9   14.6   15.0   11.4  
1969      15.0   14.4          12.4   11.9   12.7   12.3           8.2   10.8   11.7   12.1   12.4  
1970      10.0          10.3    8.0          10.3    9.7          12.2   13.5   13.7   13.5   11.2  
1971             12.1   10.1    9.8   10.5   11.2   12.8                 12.4          10.2   11.1  
1972       9.4    9.3    8.1    9.7    9.1    9.8    8.0          12.0   12.9   12.3   10.1   10.0  
1973       8.6    6.5    9.2   10.2   10.5   11.2   12.3   11.8   11.1   12.6   13.0   13.0   10.8  
1974      10.8   10.6   11.1    9.8          10.0   11.3                                      10.6  
1975                    10.4    9.1    9.2    9.4    4.5    5.8          12.2          12.9    9.6  
1976      10.6          10.7   12.1   13.0          14.1   14.7   15.2          14.1   13.6   13.1  
1977      15.0   13.6          13.4   13.6   14.0          14.8   15.3          15.7   14.7   14.4  
1978       6.9          10.3    6.9    8.8          11.2          12.4   13.3   14.2   14.6   11.0  
1979      13.6           5.0    8.6          10.4   11.4   11.4          11.0   10.3   10.9   10.3  
1980             11.0          10.5   10.1   12.0   12.5   13.3   13.8   14.6          14.1   12.4  
1981      14.5   14.7          13.3   12.7   12.7   13.3   14.1   15.7   15.1   15.5   15.6   14.3  
1982             14.6   12.2   12.0          12.0   12.8   13.3   14.0          15.1   14.4   13.4  
1983      14.0          12.3           8.7    8.7    9.9   11.7   13.1          13.9   11.1   11.6  
1984      10.4    8.9           5.1    4.3    8.6   11.2   12.7                 13.6   14.2    9.9  
1985      14.1   13.6   13.3   13.6   13.9   13.7   14.2   14.7   15.0   13.6   13.9   13.1   13.9  
1986      13.5   11.3          10.7   12.1   13.7   13.9          15.0   15.7          16.0   13.7  
1987      13.2   11.4    9.6   10.8   11.5   11.6   13.3   14.1   14.6   15.2   15.8   16.1   13.1  
1988      16.3   14.9   13.6   13.0   12.5   12.9   13.5   13.5   14.0   14.5   15.0   14.0   13.9  
1989             13.9   12.7    9.4    8.0    7.2    8.6    9.0   10.5   10.3   10.3   11.2   10.1  
1990      11.2   11.2   11.7   10.5    9.1    8.7   10.5   11.5   12.2   13.5   14.2   14.6   11.6  
1991      13.6   12.9   13.1   12.0   12.1          11.5   12.2   13.0   13.2   13.7          12.7  
1992      13.4   13.3          12.7   12.7   13.0   13.5   14.0   14.2   13.9   13.8   13.8   13.5  
1993      13.2   12.8    9.9    9.5   10.3   11.5   12.7   13.6                               11.7  
1994       9.4   13.3    6.3           7.9   10.2   11.9   12.6   13.1   13.5          13.9   10.9  
1995      13.7   13.2   12.3          12.7   13.0   13.2          14.2   14.6   13.6          13.5  
1996      12.4    9.5   10.3    8.6           9.5   10.6   11.3   12.6          11.6   12.3   11.0  
1997       9.1    7.6    8.9    9.7   10.2   11.2   12.3          10.9          12.5   10.6   10.2  
1998       9.2    4.4           5.7          10.4   11.5   13.3          14.2   14.7   15.1   10.8  
1999      14.4          12.1   11.4   12.2   13.0   13.5   14.2          10.0   11.5          12.6  
2000      12.2   12.4   12.0    9.8   10.8   11.9   12.5   12.7   13.2   11.5   13.4   13.7   12.1  
2001      13.8   12.8   12.4   10.6   11.4    9.7           8.1   10.8   12.5   13.6   14.4   13.3  
2002      15.0   15.3   15.5   14.8   13.9   14.1   14.6   15.1   14.8   14.1   11.4    9.9   14.0  
2003      10.0   10.7    6.9    7.9    9.7    7.3    8.6   11.3   11.8   11.4   10.7    8.9    9.6  
2004       9.4   10.4   11.7   11.1   11.1   12.4   13.4   14.1   14.6   15.1   15.1   14.4   12.7  
2005      13.8   13.2   12.3   10.8   11.7   12.0   11.7   12.0   13.3   13.6   12.3   11.4   12.3  
2006      10.7   10.9   11.9   12.9   13.6   14.0   11.8   12.8   13.6   13.6   12.4   11.5   12.4  
2007      11.3   11.9   11.8   10.0   10.3   12.1   13.4   14.3   15.0   15.5   15.7   15.9   13.1  
2008      15.4   14.6   13.8   13.6   13.5   13.1   13.8   14.6   15.4   16.0   16.4   16.1   14.7  
2009      15.0   14.9   15.0   14.6   13.2   12.3   11.8   12.5   11.5   12.0    8.6    6.8   12.6  
2010       7.8    8.3    5.1    6.6   10.4   12.2   13.4   14.1   14.5   12.5   12.6   13.3   10.8  
2011      13.9   13.2   12.8   12.1   12.0   13.1   13.8   13.3    8.4   10.7   11.4   10.5   12.1  
2012      10.9   11.9   12.2   12.9   13.5   13.8   14.5   14.8   14.9   15.0   12.1   12.6   13.2  
2013      11.7   11.8   11.2   11.4   12.0   12.7   12.8   12.7   13.6   13.7   13.5   13.1   12.5  
2014      11.4   10.3   10.3    9.4          11.8   12.2   13.1   13.9   14.5   14.8   14.0   11.8  

Monthly minimums, quartiles, averages, and maximums for period of record                            
minimum    6.5    4.4    4.3    4.4    4.3    6.1    4.5    5.5    6.0    9.9    7.4    4.9    4.3  

25th      10.7   10.5    9.8    9.4   10.1   10.3   11.4   12.2   12.0   12.5   11.7   11.5   10.8  

median    12.5   12.1   11.5   10.5   11.1   11.6   12.5   12.9   13.5   13.6   13.6   13.6   12.1  

average   12.2   11.7   10.9   10.4   11.0   11.4   12.1   12.6   12.8   13.4   13.1   13.0   11.9  

75th      14.0   13.3   12.3   12.0   12.7   12.7   13.4   14.1   14.5   14.3   14.5   14.6   13.1  

maximum   16.3   15.4   15.6   15.3   14.5   14.3   14.8   15.4   15.7   16.2   16.5   16.5   16.5  

****************************                                                                        

Statistics of ground-water levels from well Qe44-01 (permit 49320). Monthly and annual means        
YR         JAN    FEB    MAR    APR    MAY    JUN    JUL    AUG    SEP    OCT    NOV    DEC    AVG  
------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------  
1959                                                              10.5          10.0          10.3  
1960                            7.1                                8.3    8.8                  8.1  
1961       6.5                  6.9    7.0                               10.4                  7.6  
1962                                                       11.3   12.0   12.2   11.3          11.7  
1963       7.1    7.0    5.0    7.5    7.9    7.1          10.6   11.5   11.3   10.5           8.6  
1964       5.6    5.3    5.1    5.4    6.8    9.4          11.6   12.2   11.1   10.8   10.4    8.4  
1965       9.1    6.8    7.4    6.8           9.0    9.1    8.3    9.6   10.3   10.6   11.1    8.9  
1966      11.1           7.3    7.1           7.0          10.2   11.7   11.5   11.0   11.0    9.8  
1967       8.7           6.4    7.5    6.8    9.2           8.7           7.3    8.3    6.3    7.7  
1968              6.8    5.5    7.1    7.7    6.6    8.1    9.9          11.6   11.8   11.4    8.6  
1969      10.9    7.5           6.5    7.1    9.4    9.1    5.8           9.3   10.0    7.1    8.3  
1970       5.7           6.3    5.2                               10.8   11.4    8.9           7.8  
1971       5.8    5.5    6.1    7.0    6.5    7.3    9.7                  5.3           6.3    6.6  
1972       6.9    5.7    5.7    6.0    5.4    6.4    6.2           8.8    7.6    5.5    5.5    6.3  
1973       5.7    4.9    6.0    5.7    6.6    8.3    8.9    9.8    7.3    9.1    9.3    6.6    7.3  
1974       5.5    6.2    7.0    6.6           5.9    9.3    7.7           8.4    9.1    6.4    7.2  
1975       5.4    5.2           5.4    6.2    7.1           6.1           6.9    6.3    7.0    6.2  
1976       5.9           6.9    7.3    8.4          10.0   10.5   11.2           7.1    9.3    8.5  
1977       6.9    7.4    6.9           8.0    9.2          11.2   11.1           9.5    7.9    8.7  
1978       5.2           6.3    6.0    5.8           9.6    8.0          10.6   11.1    7.8    7.8  
1979                     5.0    5.7           5.9    8.3    8.8           5.9    5.3    6.4    6.4  
1980              7.0           5.6    6.2           9.3          10.6   11.7           9.4    8.5  
1981      10.0    8.2    7.9           7.5    8.2   10.2   10.4          11.6   11.9   11.8    9.9  
1982              7.7    7.0    7.0    8.6    9.3   10.0    9.9   11.0   10.8    8.6    7.3    8.7  
1983       6.8    6.1    5.5           6.9    7.5    8.8    8.9    9.8    8.0    7.2    6.1    7.3  
1984       6.0    5.7    5.0    5.8    6.9    8.1    8.8          10.8   11.0   10.0    9.2    8.0  
1985       8.6    6.9    7.6    8.3    9.9   10.5   11.3    6.7    7.6    6.9    8.0    7.5    8.3  
1986       6.9    6.2    7.3           9.1   10.7   11.5   11.3   11.2   11.9   11.8   10.6   10.0  
1987       6.8    5.7    5.8    6.6    6.5    8.2   10.4   11.0   11.4   11.8   11.1   10.1    8.6  
1988       8.0    6.0    6.7    7.1    7.6    9.7   10.6   11.2   11.9   11.8   11.2   10.3    9.4  
1989      10.2    8.8    6.1    6.1    6.4    7.1    5.8    6.0    7.1    7.3    6.4    7.0    7.0  
1990       6.7    6.9    7.6    7.0    6.1    7.8    9.2    8.6    9.5    9.9   10.2    9.7    8.2  
1991       6.8    7.6    6.5    6.9    8.6    9.9    9.8   10.3   10.4    8.8    9.3           8.3  
1992       7.3    7.1    6.3    7.9    8.3    8.3    9.7    6.2    8.6    8.1    7.7    6.9    7.8  
1993       5.9    5.3    5.3    6.1    7.1    6.8    9.2   10.6   11.6          10.8    7.9    7.6  
1994       3.7    6.2    5.2           7.8    7.4   10.0    8.4    7.2    9.1           7.5    7.2  
1995       7.5    7.2    7.3           8.0    9.0   10.2          12.0   11.7    9.5           9.1  
1996       7.5    6.3    7.4    6.7           7.6    9.1    8.2    7.3           7.5    7.3    7.5  
1997       6.6    6.4    6.7    6.6    8.5    9.6    9.6          10.9          10.8    6.9    8.3  
1998       5.8    5.4           6.2    7.0    8.3    8.9   12.0          12.4   12.3   12.5    8.8  
1999       9.2           6.9    7.1    9.0   11.0   11.3   11.9    8.2           7.9           9.0  
2000       7.6    7.1    8.6    6.7    7.9    9.5    8.6    8.0    6.7    7.9    9.1    7.6    7.9  
2001       6.3    6.7    6.5    6.9    9.0    7.5   10.1    5.8    9.5   10.2   11.0   11.2    8.4  
2002      10.8   10.2   10.2    7.6    7.5    9.7   11.1   13.0    9.5    7.8    6.9    6.3    9.6  
2003              4.4    5.8    5.4    5.9    6.6    7.9    8.3    8.2    7.6    5.5    5.0    6.4  
2004       6.5    6.4    7.5    6.6    7.7    9.3   11.0    9.4    9.2    9.6    8.9    7.4    8.8  
2005       7.3    6.4    6.3    6.9    7.7    7.3    6.8    7.9    9.9    7.5    7.2    6.1    7.3  
2006       6.0    6.5    7.9    8.8    9.5   10.1    9.4   11.0    8.9    7.7    6.0    6.4    8.2  
2007       5.7    6.0    5.8    6.1    8.0    9.7   11.5   11.5   11.8   12.2   11.6   11.3    9.3  
2008       9.7    8.3    7.7    8.4    7.7    8.2    9.1   10.8   11.6   11.6   10.2    7.0    9.2  
2009       7.1    7.9    8.1    7.0    7.0    6.2    9.0    9.7    8.4    7.9    5.8    5.4    7.5  
2010       6.1    5.8    5.8    6.8    8.4   10.3   12.3   13.2   13.3   11.7   11.2   11.2    9.5  
2011      10.1    8.3    7.6    8.1    9.6   11.1   12.7   13.1    9.4   10.0    9.5    8.5    9.9  
2012       8.5    8.4    7.5    8.8    9.0   11.2   13.4   13.7   11.0   12.2    7.4    8.1    9.5  
2013       6.9    6.5    6.1    6.8    7.3    6.8    7.0    7.7    9.6    8.4    8.7    6.6    7.4  
2014       6.2    6.2    6.6    6.5    7.4    9.8   11.4   10.5   10.5   10.3   10.8    8.5    8.4  

Monthly minimums, quartiles, averages, and maximums for period of record                            
minimum    3.7    4.4    5.0    5.1    5.4    5.4    5.3    5.2    6.2    5.3    4.7    4.9    3.7  

25th       6.0    6.0    5.8    6.1    6.8    7.3    8.9    8.2    8.8    7.9    7.6    6.6    7.5  

median     6.8    6.5    6.5    6.8    7.6    8.3    9.6    9.9   10.4   10.0    9.5    7.5    8.3  

average    7.2    6.7    6.6    6.8    7.6    8.5    9.6    9.6   10.0    9.7    9.2    8.2    8.3  

75th       8.1    7.2    7.4    7.1    8.3    9.6   10.4   11.1   11.2   11.6   10.8    9.9    8.9  

maximum   11.9   10.2   10.2    9.9   11.2   12.8   14.1   14.2   13.5   12.7   12.3   12.5   14.2