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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Waterford Township

Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Read More.

In addition to tap water disinfection, chloroform pollution in the environment also comes from industrial discharges from pulp and paper mills, and from urban wastewater effluent. Human studies show that chloroform damages the kidneys, liver and central nervous system. In animals, chloroform causes infertility, birth defects and cancer.

Click here to read more about disinfection byproducts.

 

42

Samples

0

Samples exceeding legal limit (MCL)

26

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20142.48 ppb3018ND - 13.0 ppb
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
20180.930 ppb106ND - 4.00 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.4 ppb

The EWG Health Guideline of 0.4 ppb for chloroform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-28LLF079223.70 ppb
2014-01-28LLF0792410.00 ppb
2014-01-28LLF079235.50 ppb
2014-01-28LLF079214.70 ppb
2014-03-05LLF110001.10 ppb
2014-03-05LLF109991.40 ppb
2014-04-09LLF1414613.0 ppb
2014-04-09LLF141473.20 ppb
2014-04-09LLF14149ND
2014-04-09LLF141484.40 ppb
2014-06-04LLF209451.60 ppb
2014-06-04LLF20944ND
2014-06-04LLF209471.90 ppb
2014-06-04LLF209460.600 ppb
2014-06-04LLF20943ND
2014-06-04LLF20942ND
2014-06-04LLF20939ND
2014-06-04LLF20941ND
2014-06-04LLF20940ND
2014-06-04LLF20936ND
2014-06-04LLF20938ND
2014-06-04LLF20937ND
2014-07-17LLF2791810.00 ppb
2014-07-17LLF279193.30 ppb
2014-07-17LLF279174.10 ppb
2014-07-17LLF279200.500 ppb
2014-09-10LLF375504.00 ppb
2014-09-10LLF37549ND
2014-10-09LLF48781ND
2014-12-09LLF487801.50 ppb
2018-03-06LLH689690.900 ppb
2018-03-06LLH689681.000 ppb
2018-05-16LLH80891ND
2018-05-16LLH80892ND
2018-07-19LLH940531.80 ppb
2018-07-19LLH940544.00 ppb
2018-07-19LLH94051ND
2018-07-19LLH94052ND
2018-12-06LLI182290.800 ppb
2018-12-06LLI182280.800 ppb
2019-07-23LLI512932.70 ppb
2019-07-23LLI512921.80 ppb