Water Quality Report

ANNUAL WATER QUALITY REPORT

Volatile Organic Compounds:

Contaminant	MCLG	MCL		Ashburton Plant			Source
				HLD*	Range
Benzene	0 ppb	5 ppb		<0.5	-		Discharge from factories; Leaching from gas storage tanks and landfills.
Carbon tetrachloride	0 ppb	5 ppb		<0.5	-		Discharge from chemical Plants and other indstrial activities.
Chlorobenzene	100 ppb	100 ppb		<0.5	-		Discharge from chemical and agricultural chemical factories.
o-Dichlorobenzene	600ppb	600 ppb		<0.5	-		Discharge from industrial chemical factories.
p-Dichlorobenzene	75 ppb	75 ppb		<0.5	-		Discharge from industrial chemical factories.
1,2-Dichloroethane	0 ppb	5 ppb		<0.5	-		Discharge from industrial chemical factories.
1,1-Dichloroethylene	7ppb	7 ppb		<0.5	-		Discharge from industrial chemical factories.
cis-1,2-Dichloroethylene	70 ppb	70 ppb		<0.5	-		Discharge from industrial chemical factories.
trans-1,2-Dichloroethylene	100 ppb	100 ppb		<0.5	-		Discharge from industrial chemical factories.
Dichloromethane	0 ppb	5 ppb		<0.5	-		Discharge from pharmaceutical and chemical factories.
1,2-Dichloropropane	0 ppb	5 ppb		<0.5	-		Discharge from industrialChemical factories.
Ethylbenzene	700 ppb	700 ppb		<0.5	-		Discharge from petroleum refineries.
HAA5 (Total Haloacetic Acids)	-	60 ppb		67	5 - 67		By-product of drinking water chlorination.
Styrene	100ppb	100 ppb		<0.5	-		Discharge from rubber and plastic factories; Leaching from landfills.
Tetrachloroethylene	0 ppb	5 ppb		<0.5	-		Leaching from PVC pipes; Discharge from factories and dry cleaners.
1,2,4-Trichlorobenzene	70 ppb	70 ppb		<0.5	-		Discharge from textile- finishing factories.
1,1,1-Trichloroethane	200 ppb	200 ppb		<0.5	-		Discharge from metal degreasing sites and other factories.
1,1,2-Trichloroethane	3 ppb	5 ppb		<0.5	-		Discharge from industrial chemical factories.
Trichloroethylene	0 ppb	5 ppb		<0.5	-		Discharge from metal degreasing sites and other factories.
TTHMs [total trihalomethanes]	0 ppb	100 ppb		103	13 - 103		By-product of drinking water chlorination.
Toluene	1 ppb	1 ppm		<0.5			Discharge from petroleum factories.
Vinyl Chloride	0 ppb	2 ppb		<0.5	-		Leaching from PVC piping; Discharge from plastics factories.
Xylenes	10 ppm	10 ppm		<0.5	-		Discharge from petroleum factories; Discharge from chemical factories.

Contaminant	MCLG	MCL	Montebello Plants			Source
			HLD*		Range	Discharge from factories; Leaching from gas storage tanks and landfills.
Benzene	0 ppb	5 ppb	<0.5		-	Discharge from chemical plants and other industrial activities.
Carbon tetrachloride	0 ppb	5 ppb	<0.5		-	Discharge from chemical and agricultural chemical factories.
Chlorobenzene	100 ppb	100 ppb	<0.5		-	Discharge from industrial chemical factories.
o-Dichlorobenzene	600 ppb	600 ppb	<0.5		-	Discharge from industrial chemical factories.
p-Dichlorobenzene	75 ppb	75 ppb	<0.5		-	Discharge from industrial chemical factories.
1,2-Dichloroethane	0 ppb	5 ppb	<0.5		-	Discharge from industrial chemical factories.
1,1-Dichloroethylene	7 ppb	7 ppb	<0.5		-	Discharge from industrial chemical factories.
cis-1,2-Dichloroethylene	70 ppb	70 ppb	<0.5		-	Discharge from industrial chemical factories.
trans-1,2-Dichloroethylene	100 ppb	100 ppb	<0.5		-	Discharge from pharmaceutical and chemical factories.
Dichloromethane	0 ppb	5 ppb	<0.5		-	Discharge from industrial chemical factories.
1,2-Dichloropropane	0 ppb	5 ppb	<0.5		-	Discharge from petroleum refineries.
Ethylbenzene	700 ppb	700 ppb	<0.5		-	Discharge from rubber and plastic factories; Leaching from landfills.
HAA5 (Total Haloacetic Acids)	-	60 ppb	57		5 - 57	By-product of drinking water chlorination.
Styrene	100 ppb	100 ppb	<0.5		-	Leaching from PVC pipes; Discharge from factories and dry cleaners.
Tetrachloroethylene	0 ppb	5 ppb	<0.5		-	Discharge from textile- finishing factories.
1,2,4-Trichlorobenzene	70 ppb	70 ppb	<0.5		-	Discharge from metal degreasing sites and other factories.
1,1,1-Trichloroethane	200ppb	200 ppb	<0.5		-	Discharge from industrial chemical factories.
1,1,2-Trichloroethane	3 ppb	5 ppb	<0.5		-	Discharge from metal degreasing sites and other factories.
Trichloroethylene	0 ppb	5 ppb	<0.5		-	Discharge from metal degreasing sites and other factories.
TTHMs [total trihalomethanes]	0 ppb	100 ppb	87		15 - 87	By-product of drinking water chlorination.
Toluene	1 ppb	1 ppm	<0.5		-	Leaching from PVC piping; Discharge from plastics factories.
Vinyl Chloride	0 ppb	2 ppb	<0.5		-	Discharge from petroleum factories; Discharge from chemical factories.
Xylenes	10 ppm	10 ppm	<0.5		-	Discharge from petroleum factories; Discharge from chemical factories.