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EWG's Tap Water Database — 2019 UPDATE

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Chloroform

West Carrollton City PWS

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.

 

37

Samples

0

Samples exceeding legal limit (MCL)

24

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.54 ppb220.550 ppb - 2.53 ppb
20130.595 ppb1710ND - 2.13 ppb
20141.01 ppb117ND - 3.68 ppb
20151.57 ppb32ND - 3.93 ppb
20162.32 ppb221.14 ppb - 3.50 ppb
20170.695 ppb21ND - 1.39 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
2012-06-05DVF0115010.550 ppb
2012-07-03DVG0046012.53 ppb
2013-01-0713A0336-01ND
2013-03-2513C1304-010.700 ppb
2013-03-2513C1304-02ND
2013-03-2513C1304-03ND
2013-03-2513C1304-04ND
2013-06-2413F1373-040.660 ppb
2013-06-2413F1373-031.35 ppb
2013-06-2413F1373-020.550 ppb
2013-06-2413F1373-012.13 ppb
2013-09-2413I1414-011.40 ppb
2013-09-2413I1414-020.670 ppb
2013-09-2413I1414-030.880 ppb
2013-09-2413I1414-041.05 ppb
2013-12-2313L1238-04ND
2013-12-2313L1238-03ND
2013-12-2313L1238-02ND
2013-12-2313L1238-010.720 ppb
2014-03-0314C0105-04ND
2014-03-0314C0105-03ND
2014-03-0314C0105-02ND
2014-03-0314C0105-010.510 ppb
2014-06-0214F0146-011.36 ppb
2014-06-0214F0146-020.890 ppb
2014-06-0214F0146-03ND
2014-06-0214F0146-040.590 ppb
2014-09-0814I0475-023.68 ppb
2014-09-1514I0936-013.33 ppb
2014-09-1514I0936-020.760 ppb
2015-06-0215F0128-01ND
2015-07-0615G0349-013.93 ppb
2015-07-0615G0349-020.780 ppb
2016-07-1116G0758-013.50 ppb
2016-07-1116G0758-021.14 ppb
2017-07-1017G0522-011.39 ppb
2017-07-1017G0522-02ND