Piqua Ohio Water Quality Table

Water Quality Data Table

Definitions: MCLG: Maximum Contaminant Level Goal, or the level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety. - MCL: Maximum Contaminant Level, or the highest level of contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology. - AL: Action Level, or the concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow. - TT: Treatment Technique, or a required process intended to reduce the level of a contaminant in drinking water.
-"<": a symbol which means less than. A result of <5 means that the lowest level that could be detected was 5, and the contaminant in that sample was not detected. - NA: Not Applicable or no standard set.

Abbreviations: ppm: Parts per Million or Milligrams per Liter (mg/L) are units of measure for concentration of a contaminant. A part per million corresponds to one second in a little over 11.5 days. - ppb: Parts per Billion or Micrograms per Liter (µg/L) are units of measure for concentration of a contaminant. A part per billion corresponds to one second in 31.7 years.

Contaminants (Units)	MCLG	MCL	Level Found	Range of Detection	Violation	Sample Year	Typical Source of Contaminants
Contaminants (Units)	MCLG	MCL	Level Found	Range of Detection	Violation	Sample Year	Typical Source of Contaminants
Microbiological Contaminants
Turbidity	NA	TT	0.35	0.03 – 0.35	NONE	2007	Soil runoff
Turbidity (% samples meeting Standards)	NA	TT	99.4%	99.4% - 100%	NONE	2007
Inorganic Contaminants
Fluoride (ppm)	4	4	1.04	0.79 – 1.29	NONE	2007	Erosion of natural deposits; Water additive which promotes strong teeth; Discharge from fertilizer & aluminum factories
Lead (ppb)	0	AL =15	<5.0	<5.0-13.0	NONE	2006	Corrosion of household plumbing systems
Lead (ppb)	Zero out of thirty samples was found to have lead in excess of the Action Level of 15 ppb.
Copper (ppm)	1.3	AL =1.3	0.045	<0.005 – 0.544	NONE	2006	Corrosion of household plumbing; Erosion of natural deposits; leaching from wood preservatives
Copper (ppm)	Zero out of thirty samples was found to have copper levels in excess of the Action Level of 1.3 ppm.
Barium (ppm)	2	2	0.015	NA	NONE	2007	Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits
Nitrate (ppm)	10	10	2.07	1.01 – 2.07	NONE	2007	Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits
Synthetic Organic Contaminants including Pesticides and Herbicides
Atrazine (ppb)	3	3	0.59	<0.30 – 2.4	NONE	2007	Runoff from herbicide used on row crops
Simazine (ppb)	4	4	0.26	<0.40 – 0.81	NONE	2007	Herbicide runoff
Volatile Organic Contaminants
TTHMs (Total trihalomethanes) (ppb)	NA	80	54.5	19.7 - 109	NONE	2007	By-product of drinking water chlorination
Haloacetic Acids (ppb)	NA	60	19.5	<6.0 – 34.0	NONE	2007	By-product of drinking water chlorination
Unregulated Contaminants
Bromodichloromethane (ppb)	NA	NA	16.6	3.8 – 16.6	NONE	2007	Component of Total Trihalomethane
Dibromochloromethane (ppb)	NA	NA	5.0	0.8 – 5.0	NONE	2007	Component of Total Trihalomethane
Chloroform (ppb)	NA	NA	90.3	15.1 – 90.3	NONE	2007	Component of Total Trihalomethane
Dichloroacetic Acid (ppb)	NA	NA	26.3	8.8 – 26.3	NONE	2007	Component of Haloacetic Acids
Trichloroacetic Acid (ppb)	NA	NA	8.8	<1.0 – 8.8	NONE	2007	Component of Haloacetic Acids
Monochloroacetic Acid (ppb)	NA	NA	2.5	<2.0 – 2.5	NONE	2007	Component of Haloacetic Acids
Bromochloroacetic Acid (ppb)	NA	NA	6.1	<1.0 – 6.1	NONE	2007	Component of Haloacetic Acids
Total Organic Carbon (ppb)	NA	NA	3.5	1.3 – 3.5	NONE	2007	Naturally occurring Organic material in water
Residual Disinfectants
Chlorine (ppm)	MRDL=4	MRDLG=4	1.16	1.01 –1.39	NONE	2007	Water additive used to control microbes

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