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CHESTER COUNTY OBSERVATION WELL NETWORK - REPORT FOR MARCH 2020 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
Well Number	Municipal Location	Current Month Depth to Water and Current Status		Drought Emergency	Drought Warning	Drought Watch	Median
CH 2*	Honey Brook	8.56	Below Median	10.05	9.44	8.57	8.12
CH 38*	New Garden	7.10	Below Median	12.84	10.13	7.35	6.80
CH 210	Tredyffrin	20.16	Below Median	24.27	22.37	20.26	19.30
CH 254	East Nottingham	19.27	Above Median	27.16	26.27	24.71	22.23
CH 1201	West Sadsbury	4.72	Above Median	6.40	6.04	5.44	4.87
CH 1229*^	Upper Uwchlan	31.81	Below Median	36.65	35.41	34.00	30.99
CH 1247*	West Vincent	28.48	Below Median	33.53	31.50	29.28	28.45
CH 1387	Thornbury	32.97	Below Median	36.72	35.81	34.18	32.44
CH 1571	East Vincent	5.50	Above Median	6.83	6.47	6.09	5.72
CH 1921	New Garden	42.08	Above Median	47.83	47.56	45.80	44.58
CH 2273	West Brandywine	-1.16	Below Median	3.20	2.00	-0.83	-1.52
CH 2313	East Whiteland	8.18	Drought Watch	11.68	11.07	7.35	5.06
CH 2328	East Nantmeal	1.43	Above Median	3.94	3.27	2.03	1.59
CH 2457	East Goshen	17.45	Below Median	19.52	19.20	18.37	17.24
CH 2561	Charlestown	90.78	No Statistics	XXX	XXX	XXX	XXX
CH 2584	East Marlborough	19.10	No Statistics	XXX	XXX	XXX	XXX
CH 3289	Tredyffrin	18.57	Above Median	22.06	21.37	20.50	19.41
CH 5422	Londonderry	17.46	No Statistics	XXX	XXX	XXX	XXX
CH 6513	North Coventry	15.40	No Statistics	XXX	XXX	XXX	XXX
CH 6516	Pennsbury	-0.23	No Statistics	XXX	XXX	XXX	XXX
CH 6517	West Caln	57.92	No Statistics	XXX	XXX	XXX	XXX
CH 6518	Lower Oxford	21.79	No Statistics	XXX	XXX	XXX	XXX
CH 7007	Wallace	27.18	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 - 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
^Recent activity at the well site may have altered the hydrologic conditions as they apply to the drought triggers.
Wells CH 2273, CH 2328 and CH 6516 can have ground water levels above the land surface (known as an artesian well); a (-) sign indicates a water level 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: 4/3/20