Pennsylvania

Summary of Drinking Water Samples Tested by the Penn State Agricultural Analytical Services Laboratory

1/4/2007 - 7/9/2018, 10,378 Samples

Test Parameter	Units	Number of Samples Tested	Median	Minimum	Maximum	Number of samples failing EPA Std	Percent of samples failing EPA Std	EPA Drink Water Std
Total Coliform	MPN/100 mL	9673	0.0	0.0	2419.6	4785	49.5	0
E. Coli	MPN/100 mL	9673	0.0	0.0	517.2	1259	13.0	0
pH	-	8408	7.5	2.7	11.1	1188	14.1	6.5-8.5
Total Dissolved Solids	mg/L	8360	185.0	10.0	4032.0	482	5.8	500
Corrosivity Index*	-	3671	-0.6	-7.6	3.1	2454	66.8	-
Hardness	mg/L	3830	87.3	0.8	1823.6	-	-	-
Nitrate+Nitrite N	mg/L	3455	0.7	0.2	217.7	121	3.5	10
Chloride	mg/L	1556	7.3	1.0	2196.2	32	2.1	250
Sulfate	mg/L	499	15.7	1.0	1422.4	29	5.8	250
Aluminum	mg/L	345	0.0	0.0	31.4	62	18.0	0.05-0.2
Arsenic	mg/L	2268	0.00	0.001	0.354	125	5.5	0.01
Barium	mg/L	2660	0.06	0.00	6.02	10	0.4	2
Cadmium	mg/L	684	0.00	0.001	0.028	2	0.3	0.005
Calcium	mg/L	3503	22.05	0.25	540.35	-	-	-
Chromium	mg/L	684	0.0	0.001	0.007	0	0.0	0.1
Copper	mg/L	3780	0.02	0.01	68.72	113	3.0	1.0,1.3
Iron	mg/L	3851	0.1	0.0	95.1	497	12.9	0.3
Lead-1st draw	mg/L	1404	0.01	0.003	0.264	195	13.9	0.015
Lead-Running	mg/L	2643	0.003	0.003	2.417	139	5.3	0.015
Magnesium	mg/L	2440	5.42	0.05	159.98	-	-	-
Manganese	mg/L	3617	0.02	0.01	96.30	1504	41.6	0.05
Mercury	mg/L	1368	0.05	0.000	52.267	767	56.1	0.002
Nickel	mg/L	533	0.01	0.003	0.055	-	-	-
Sodium	mg/L	886	0.01	0.01	77.34	-	-	-
Zinc	mg/L	1511	0.00	0.00	4.60	0	0.0	5

*For corrosivity index, failure criteria based on less than -0.5 or greater than 0.5