CHESTER COUNTY OBSERVATION WELL NETWORK - REPORT FOR JANUARY 2010
Levels Indicated are Depth to Water in Feet Below Land Surface

 Well
Number

 Municipal
Location
Current Month
Depth to Water
and Current Status

Reference Data for Current Status

Drought Emergency

Drought Warning

Drought Watch

Median

CH 2*

Honey Brook

 6.91

 Above Median

11.89

10.65

9.64

8.63

CH 10*

West Marlborough

 10.51

 Above Median

15.1

14.57

13.68

12.67

CH 12

West Bradford

 32.78

 Above Median

38.5

38.5

38.5

37.08

CH 38*

New Garden

 5.09

 Above Median

14.24

12.93

10.17

7.34

CH 89

East Whiteland

 138.98

 No Statistics

XXX

XXX

XXX

XXX

CH 210

Tredyffrin

 18.97

 Above Median

26.29

24.77

21.72

20.45

CH 254

East Nottingham

 21.43

 Above Median

28.52

27.51

25.3

23.89

CH 1201

West Sadsbury

 4.28

 Above Median

7.2

7

6.09

5.16

CH 1229*

Upper Uwchlan

 34.17

 Above Median

41.62

41.18

39.52

37.64

CH 1247*

West Vincent

 27.97

 Above Median

34.5

34.02

31.79

30.46

CH 1387

Thornbury

 30.29

 Above Median

37.27

36.45

35.81

33.61

CH 1571

East Vincent

 5.89

 Above Median

10.74

8.78

7

6.4

CH 1921

New Garden

 39.08

 Above Median

48.85

47.95

47.05

45.71

CH 2273

West Brandywine

 -1

 Above Median

4.36

3.75

0.98

-0.36

CH 2313

East Whiteland

 4.97

 Above Median

12.76

12.41

10.85

9.09

CH 2328

East Nantmeal

 0.89

 Above Median

4.94

4.04

3.1

2.19

CH 2456

East Brandywine

 19.04

 Above Median

21.36

19.95

19.77

19.36

CH 2457

East Goshen

 15.12

 Above Median

22.01

21.29

20.59

19.42

CH 2561

Charlestown

 87.74

 No Statistics

XXX

XXX

XXX

XXX

CH 2584

East Marlborough

 17.92

 No Statistics

XXX

XXX

XXX

XXX

CH 2663

New Garden

 9.9

 Above Median

11.2

10.89

10.45

10.04

CH 3289

Tredyffrin

 19.26

 Above Median

23.58

21.94

21.04

20.2

CH 5422

Londonderry

 16.52

 No Statistics

XXX

XXX

XXX

XXX

CH 6513

North Coventry

 14.35

 No Statistics

XXX

XXX

XXX

XXX

CH 6516

Pennsbury

 -0.48

 No Statistics

XXX

XXX

XXX

XXX

CH 6517

West Caln

 60.11

 No Statistics

XXX

XXX

XXX

XXX

CH 6518

Lower Oxford

 19.28

 No Statistics

XXX

XXX

XXX

XXX

CH 7007

Wallace

 25.14

 No Statistics

XXX

XXX

XXX

XXX

CH 7269

Newlin

 7.88

 No Statistics

XXX

XXX

XXX

XXX
Current Status Explanation
Above Median - Depth to water level < 50th percentile
Below Median - Depth to water level > 50th and < 75th percentile
Drought Watch - Depth to water level > 75th and < 90th percentile
Drought Warning - Depth to water level > 90th and < 95th percentile
Drought Emergency - Above Median (Depth to water level > 95th percentile
No Statistics - Statistics not available for this well

Median shows the middle of the distribution and is less sensitive to extreme water levels, so it is more typical than the mean.

XXX = statistic not available for this well

*wells monitored for the Christina Basin Drought Management Plan

Wells CH 2273, CH 2328 and CH 6516 can have ground water flowing above the land surface (known as an artesian well); a (-) sign indicates water flowing above the land surface.

Percentiles shown were revised as of May 31, 2006 to reflect updated statistical analysis reported in the  U.S. Geological Survey report DS-292.

 Date Prepared: 01/21/10