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Westfield Water Quality Data

The chart below gives you a quick look at some of the substances that the EPA requires the utility to test for. You’ll notice that the contaminant is listed to the left, followed by the maximum amount allowed by regulations and then the amount that we found in our water. The tests are done on treated or “finished” water (excluding the last three listed in this chart). See Definitions of Terms for an explaination of this chart.

Contaminant MCLG (Goal) MCL (Limit) Average of All Samples Maximum of All Samples System Wide Range Compliance Achieved Possible Source
Inorganics              
Barium (ppm) 2 ppm 2 ppm 0.1 0.2 0.046 - 0.20 Yes Natural deposits
Fluoride (ppm) 4 ppm 4 ppm 0.7 1.5 0.1 - 1.5 Yes Natural deposits & treatment additive
Nitrate (ppm) 10 ppm 10 ppm 0.13 0.42 ND - 0.42 Yes Fertilizer, septic tank leachate
Copper and Lead MCLG AL          
Copper (ppm) (2016 Data) 1.3 ppm 1.3 ppm     0.20 (ND - 0.97) 90th Percentile Yes Corrosion of customer plumbing
Lead (ppb) (2016 Data) 0 ppb 15 ppb     2.5 (ND - 4.1) 90th Percentile Yes Corrosion of customer plumbing
Disinfectant Residual MRDLG MRDL          
Chlorine (as Cl2) 4 ppm 4 ppm 1.5 2.2 0.26 - 2.2 Yes Water additive used to control microbes.
Organic Disinfection By-products  
Total Trihalomethanes (TTHMs) N/A 80 ppb     17 (2.7 - 40) Highest Locational Running Annual Average Yes By-product of chlorination treatment
Haloacetic acids (HAA5) N/A 60 ppb     9.5 (ND - 23) Highest Locational Running Annual Average Yes By-product of chlorination treatment
Microorganisms              
E coli 0 1 0 0 0 Yes Human and animal fecal waste
Total Coliforms   5.0% 0% 0% 0% Yes Naturally present in the environment
Secondary Drinking Water Standards MCLG (Goal) SMCL          
Chloride (ppm)   250 ppm 38 45 24 - 45 N/A Natural deposits; water treatment additive
Hardness (ppm)   N/A 390 486 303 - 486 N/A Erosion of natural deposits; leaching
Iron (ppm)   0.3 ppm BDL 0.4 ND - 0.40 N/A Erosion of natural deposits; leaching
Manganese (ppm)   0.05 ppm BDL 0.044 ND - 0.044 N/A Erosion of natural deposits; leaching
Nickel (ppb) 100 ppb N/A ND ND ND N/A Erosion of natural deposits; leaching
Sodium (ppm)   N/A 19 31 16 - 31 N/A Erosion of natural deposits; leaching
Sulfate (ppm)   250 ppm 130 190 69 - 190 N/A Erosion of natural deposits; leaching
Zinc (ppb)   5000 ppb 3.6 7.8 ND - 7.8 N/A Natural deposits
Radionuclides (2016 Data)     
Combined Radium (-226 & -228) 0 5     0.90 - 2.0 Yes Erosion of natural deposits
Combined Uranium 0 30     0.54 - 1.1 Yes Erosion of natural deposits
Gross Alpha, Excl. Radon & Uranium 0 15     3.8 - 5.8 Yes Erosion of natural deposits

Note: The state requires us to monitor for certain contaminants less than once per year because the concentrations of these contaminants do not change frequently.  Some of our data, though accurate, is more than one year old. Some contaminants are sampled less frequently than once a year; as a result, not all contaminants were sampled for during the CCR calendar year. If any of these contaminants were detected the last time they were sampled for, they are included in the table along with the date that the detection occurred. Compliance monitoring for lead and copper is conducted every 3 years. Radiochemical contaminant monitoring is conducted every 9 years.

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