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   Water Contents

The Cleveland Division of Water is in compliance with all maximum contaminant levels and treatment techniques for drinking water.


Microbiological Contaminants MCLG MCL Level Found Range of
Detections 		Typical Source in Drinking Water
Turbidity (NTU)* N/A TT=1 0.17 N/A  
TT=95% of samples
must be less than
or equal to 0.3 NTU 		100% N/A Soil runoff
Total Coliform Bacteria 0 no more than 5% of
samples per month 		1.4% N/A Naturally present in the environment
Total Organic Carbon (mg/L) N/A TT 1.7 0.9-4.5 Naturally present in the environment
Inorganic Contaminants MCLG MCL Level Found Range of
Detections 		Typical Source in Drinking Water
Barium (mg/L) 2 2 0.016 0.015-0.016 Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits
Fluoride (mg/L) 4 4 1.2 0.8-1.3 Water additive which promotes strong teeth
Nitrate [as Nitrogen] (mg/L) 10 10 1.0 0.2-1.0 Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits
Disinfection By-Products MCLG MCL Level Found Range of
Detections 		Typical Source in Drinking Water
TTHMs [Total Trihalomethanes] (µg/L) N/A 80 28.1 5.7-50.8 By-product of drinking water chlorination
HAA [Haloacetic Acids] (mg/L) N/A 60 20.0 ND-39.0 By-product of drinking water chlorination
Lead & Copper MCLG AL Level Found No. of sites
above the AL 		Typical Source in Drinking Water
Test June to
September 2003
Copper (mg/L) 		1.3 1.3 0.087 0 out of
72 sites 		Corrosion of household plumbing systems
Test June to
September 2003
Lead (µg/L) 		0 15 6.4 2 out of
72 sites 		Corrosion of household plumbing systems
Disinfectant MRDLG MRDL Level Found Range of
Detections 		Typical Source in Drinking Water
Chlorine (mg/L) 4 4 1.1 0-2.2 Water additive to control microbes

 * A measure of the cloudiness of the water that serves as a good indicator of the effectiveness of the water treatment process.


Unregulated Substances Chart (monitoring required)
Contaminent Level Found Range of Detections Typical Source in Drinking Water
Chloroform (µg/L) 7.5 2.6-19.0 By-product of drinking water chlorination
Bromoform (µg/L) 0.7 0.6-0.8 By-product of drinking water chlorination
Bromodichloromethane (µg/L) 5.8 2.8.-11.0 By-product of drinking water chlorination
Dibromochloromethane (µg/L) 2.2 1.4-3.5 By-product of drinking water chlorination

Chart Legend & Definitions

AL
Action Level
The concentration of a contaminant, which if exceeded, triggers treatment or other requirements which a water system shall follow.
MCLG
Maximum Contaminant Level Goal
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
The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
MRDL
Maximum Residual Disinfectant Level
The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
MRDLG
Maximum Residual Disinfectant Level Goal
The level of drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.
TT
Treatment Technique
A required process intended to reduce the level of a contaminant in drinking water.
mg/L milligrams per liter, or parts per million
mg/L micrograms per liter, or parts per billion
NTU Nephelometric Turbidity Units
N/A Not applicable
ND Not detected


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