Columbia

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

9/11/2007 - 7/2/2018, 255 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	252	1.0	0.0	250.6	132	52.4	0
E. Coli	MPN/100 mL	252	0.0	0.0	200.5	22	8.7	0
pH	-	235	7.4	5.7	9.1	41	17.4	6.5-8.5
Total Dissolved Solids	mg/L	233	116.0	20.0	4032.0	3	1.3	500
Corrosivity Index*	-	84	-0.9	-4.3	1.3	51	60.7	-
Hardness	mg/L	99	63.7	0.8	1013.3	-	-	-
Nitrate+Nitrite N	mg/L	78	1.4	0.2	33.6	3	3.8	10
Chloride	mg/L	47	3.2	2.0	30.8	0	0.0	250
Sulfate	mg/L	8	17.9	1.5	50.3	0	0.0	250
Aluminum	mg/L	5	0.0	0.0	0.0	0	0.0	0.05-0.2
Arsenic	mg/L	38	0.00	0.001	0.012	3	7.9	0.01
Barium	mg/L	60	0.05	0.00	0.34	0	0.0	2
Cadmium	mg/L	15	0.00	0.001	0.004	0	0.0	0.005
Calcium	mg/L	94	16.61	0.25	187.97	-	-	-
Chromium	mg/L	15	0.0	0.001	0.005	0	0.0	0.1
Copper	mg/L	82	0.02	0.01	5.25	2	2.4	1.0,1.3
Iron	mg/L	104	0.1	0.0	6.2	14	13.5	0.3
Lead-1st draw	mg/L	31	0.00	0.003	0.264	4	12.9	0.015
Lead-Running	mg/L	60	0.003	0.003	0.695	9	15.0	0.015
Magnesium	mg/L	69	4.76	0.05	132.10	-	-	-
Manganese	mg/L	99	0.01	0.01	21.39	39	39.4	0.05
Mercury	mg/L	41	0.05	0.000	11.065	27	65.9	0.002
Nickel	mg/L	10	0.01	0.005	0.006	-	-	-
Sodium	mg/L	42	0.08	0.01	46.10	-	-	-
Zinc	mg/L	33	0.00	0.00	4.59	0	0.0	5

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