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.
Please give proper credit to the Delaware Geological Survey.
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 | Easting | Northing | Altitude | Screen Top | Screen Bottom | Aquifer | Start Date |
|---|---|---|---|---|---|---|---|
| Bc43-01 | 446473 | 4403718 | 330 | -- | 163.5 | Wissahickon | Jan 1974 |
| Db24-18 | 440157 | 4388999 | 80 | 9 | 19 | Columbia | Aug 1957 |
| Ec32-07 | 445581 | 4377499 | 9.66 | 586 | 596 | Potomac Lower Zone | Aug 1966 |
| Hb14-12 | 440943 | 4353665 | 73 | 14 | 19 | Columbia | Oct 1957 |
| Mc51-01 | 442249 | 4299830 | 55 | 13.2 | 18.2 | Columbia | Sep 1958 |
| Qe44-01 | 462211 | 4264453 | 49 | 22 | 26 | Columbia | Sep 1959 |
The following statistics are calculated for the entire period of record for each well:
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 24.5 25.0
Monthly minimums, quartiles, averages, and maximums for period of record
minimum 20.0 22.7 20.1 18.0 22.4 21.5 18.9 18.5 21.6 23.5 23.7 20.9 18.0
25th 24.6 24.7 23.9 24.0 24.7 25.0 25.8 26.5 27.9 26.0 26.6 25.4 25.7
median 25.5 25.2 24.9 24.7 25.2 25.7 27.0 28.7 30.0 30.0 29.0 27.0 27.4
average 26.4 25.9 25.3 24.9 25.4 26.3 27.1 28.4 29.6 29.7 29.3 27.5 27.2
75th 27.6 26.7 26.0 25.5 26.0 27.2 28.6 30.3 31.6 32.3 32.6 29.8 28.2
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 03-JUN-13
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 13.1 13.0 14.0
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 9.6 9.4 7.5 8.5 9.2 10.0 10.9 12.1 11.5 12.0 11.3 10.6
median 13.2 12.6 11.3 10.3 10.0 10.9 11.1 12.2 12.9 13.4 13.9 14.1 11.8
average 12.5 12.1 11.1 10.1 10.2 10.8 11.2 12.0 12.9 12.9 13.5 13.2 11.8
75th 14.4 14.2 12.6 12.4 12.2 12.9 13.2 13.9 14.3 14.4 14.9 14.9 13.5
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 50.4 52.7 39.7 47.6
1968 54.2 54.5 47.0 42.3 40.9 40.6 42.7 43.1 45.7
1969 43.5 41.7 40.6 44.7 50.9 34.5 50.4 52.6 46.0
1970 64.5 66.8 67.7 56.2 60.8 73.2 59.2 64.1
1971 48.6 55.9 52.4 53.1 52.5
1972 70.0 58.6 64.3 67.6 65.1
1973 79.2 56.4 67.8
1974 72.0 65.3 69.9 69.1
1975 65.0 72.0 75.8 67.9 76.4 71.4
1976 85.8 82.9 79.3 84.6 83.2
1977 88.6 81.2 83.2 93.9 86.7
1978 90.0 82.7 86.4
1979 87.0 87.0
1980 91.0 80.5 70.6 84.8 91.0 83.6
1981 96.1 96.3 96.3 83.7 86.4 84.2 86.0 83.9 86.1 88.5
1982 91.8 86.9 88.1 89.0 88.9 92.7 92.1 89.8
1983 92.0 80.0 87.1 89.6 94.0 92.7 93.3 87.8 89.0 89.6
1984 93.3 88.7 85.1 84.6 84.9 82.6 86.3
1985 88.7 90.4 84.9 80.7 86.8 87.9 86.7 87.1 78.6 85.4
1986 86.7 89.6 84.5 83.0 87.9 90.2 86.5 87.7 87.5
1987 86.6 84.7 81.5 77.5 75.2 75.3 91.0 89.4 90.0 84.1
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 114.6 114.6
Monthly minimums, quartiles, averages, and maximums for period of record
minimum 72.0 42.6 41.7 54.2 40.6 44.7 47.4 41.0 40.9 34.5 42.7 43.1 34.5
25th 91.5 90.9 86.1 86.7 82.9 80.1 83.8 84.2 86.7 86.8 83.5 86.1 83.5
median 98.4 97.8 97.7 98.6 91.1 96.8 94.9 94.9 99.3 96.6 96.1 93.9 89.7
average 98.1 95.8 94.6 95.3 89.9 90.6 93.4 92.3 93.9 93.0 92.1 91.5 88.9
75th 105.3 104.8 108.1 109.2 103.2 105.4 108.2 106.9 108.4 108.1 106.8 106.7 105.2
maximum 121.8 120.6 119.6 118.2 112.8 114.0 117.7 124.9 127.0 120.9 120.2 122.0 127.0
****************************
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 6.7 7.0
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 5.7 5.2 4.4 3.5 4.2 5.4 5.8 6.5 7.1 7.3 8.0 7.0 6.0
median 7.4 6.6 5.9 5.2 5.8 6.3 6.8 7.9 8.5 8.4 8.9 8.5 6.8
average 7.3 6.7 5.9 5.4 5.7 6.5 6.8 7.6 8.0 8.2 8.5 7.9 7.1
75th 9.2 8.4 7.2 6.7 7.0 7.7 7.9 8.6 9.0 9.3 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 13.4
Monthly minimums, quartiles, averages, and maximums for period of record
minimum 6.9 4.4 5.0 5.1 4.3 6.1 4.5 5.5 6.0 10.0 8.9 6.7 4.3
25th 10.7 10.7 9.8 9.5 9.7 10.2 11.3 11.9 12.0 12.7 12.0 11.5 10.8
median 13.2 12.3 11.7 10.4 11.1 11.4 12.3 12.8 13.3 13.6 13.6 13.7 12.2
average 12.4 11.8 10.9 10.4 11.0 11.3 12.0 12.5 12.8 13.4 13.2 13.2 11.9
75th 14.1 13.5 12.3 12.0 12.7 12.7 13.4 14.0 14.3 14.2 14.5 14.6 13.2
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 6.6 7.0 6.5
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 5.9 5.8 6.1 6.8 7.3 9.0 8.2 8.7 7.9 7.5 6.6 7.5
median 6.9 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 9.7 9.7 10.0 9.7 9.2 8.2 8.3
75th 8.2 7.2 7.4 7.1 8.4 9.6 10.3 11.2 11.3 11.6 10.8 10.1 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