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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Village Water System

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.

MORE ABOUT THIS CONTAMINANT

 

192

Samples

0

Samples exceeding legal limit (MCL)

50

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.0750 ppb322ND - 1.20 ppb
20150.250 ppb328ND - 1.70 ppb
20160.361 ppb3214ND - 1.30 ppb
20170.318 ppb3214ND - 1.20 ppb
2018ND320ND
20190.318 ppb3220ND - 1.000 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
2014-02-25L0040099-01ND
2014-02-25L0040099-02ND
2014-02-25L0040100-01ND
2014-02-25L0040100-02ND
2014-02-25L0040099-01ND
2014-02-25L0040099-02ND
2014-02-25L0040100-01ND
2014-02-25L0040100-02ND
2014-05-14L0043099-07ND
2014-05-14L0043099-08ND
2014-05-14L0043099-111.20 ppb
2014-05-14L0043099-12ND
2014-05-14L0043099-07ND
2014-05-14L0043099-08ND
2014-05-14L0043099-111.20 ppb
2014-05-14L0043099-12ND
2014-08-1435150984001ND
2014-08-1435150984002ND
2014-08-1435150984003ND
2014-08-1435150984004ND
2014-08-1435150984001ND
2014-08-1435150984002ND
2014-08-1435150984003ND
2014-08-1435150984004ND
2014-11-03L0050159-01ND
2014-11-03L0050159-02ND
2014-11-03L0050159-03ND
2014-11-03L0050159-04ND
2014-11-03L0050159-01ND
2014-11-03L0050159-02ND
2014-11-03L0050159-03ND
2014-11-03L0050159-04ND
2015-02-11LA3580-10.790 ppb
2015-02-11LA3580-2ND
2015-02-11LA3580-30.510 ppb
2015-02-11LA3580-41.000 ppb
2015-02-11LA3580-10.790 ppb
2015-02-11LA3580-2ND
2015-02-11LA3580-30.510 ppb
2015-02-11LA3580-41.000 ppb
2015-05-22351901280011.70 ppb
2015-05-2235190128002ND
2015-05-2235190128003ND
2015-05-2235190128004ND
2015-05-22351901280011.70 ppb
2015-05-2235190128002ND
2015-05-2235190128003ND
2015-05-2235190128004ND
2015-08-1735203449001ND
2015-08-1735203449002ND
2015-08-1735203449003ND
2015-08-1735203449004ND
2015-08-1735203449001ND
2015-08-1735203449002ND
2015-08-1735203449003ND
2015-08-1735203449004ND
2015-11-0635215875001ND
2015-11-0635215875002ND
2015-11-0635215875003ND
2015-11-0635215875004ND
2015-11-0635215875001ND
2015-11-0635215875002ND
2015-11-0635215875003ND
2015-11-0635215875004ND
2016-02-0835229107001ND
2016-02-0835229107002ND
2016-02-0835229107003ND
2016-02-0835229107004ND
2016-02-0835229107001ND
2016-02-0835229107002ND
2016-02-0835229107003ND
2016-02-0835229107004ND
2016-05-20LA20898-1ND
2016-05-20LA20898-20.520 ppb
2016-05-20LA20898-30.910 ppb
2016-05-20LA20898-40.840 ppb
2016-05-20LA20898-1ND
2016-05-20LA20898-20.520 ppb
2016-05-20LA20898-30.910 ppb
2016-05-20LA20898-40.840 ppb
2016-08-16LA24259-1ND
2016-08-16LA24259-20.580 ppb
2016-08-16LA24259-30.910 ppb
2016-08-16LA24259-41.30 ppb
2016-08-16LA24259-1ND
2016-08-16LA24259-20.580 ppb
2016-08-16LA24259-30.910 ppb
2016-08-16LA24259-41.30 ppb
2016-11-16LA27743-10.720 ppb
2016-11-16LA27743-2ND
2016-11-16LA27743-3ND
2016-11-16LA27743-4ND
2016-11-16LA27743-10.720 ppb
2016-11-16LA27743-2ND
2016-11-16LA27743-3ND
2016-11-16LA27743-4ND
2017-02-22352968800070.400 ppb
2017-02-22352968800080.470 ppb
2017-02-2235296880009ND
2017-02-22352968800100.600 ppb
2017-02-22352968800070.400 ppb
2017-02-22352968800080.470 ppb
2017-02-2235296880009ND
2017-02-22352968800100.600 ppb
2017-05-19353134290010.560 ppb
2017-05-1935313429002ND
2017-05-1935313429003ND
2017-05-1935313429004ND
2017-05-19353134290010.560 ppb
2017-05-1935313429002ND
2017-05-1935313429003ND
2017-05-1935313429004ND
2017-08-2335332706027ND
2017-08-23353327060281.10 ppb
2017-08-2335332706029ND
2017-08-2335332706030ND
2017-08-2335332706027ND
2017-08-23353327060281.10 ppb
2017-08-2335332706029ND
2017-08-2335332706030ND
2017-11-28353507620010.760 ppb
2017-11-2835350762002ND
2017-11-2835350762003ND
2017-11-28353507620041.20 ppb
2017-11-28353507620010.760 ppb
2017-11-2835350762002ND
2017-11-2835350762003ND
2017-11-28353507620041.20 ppb
2018-02-1235373899001ND
2018-02-1235373899002ND
2018-02-1235373899003ND
2018-02-1235373899004ND
2018-02-1235373899001ND
2018-02-1235373899002ND
2018-02-1235373899003ND
2018-02-1235373899004ND
2018-05-1035392013001ND
2018-05-1035392013002ND
2018-05-1035392013003ND
2018-05-1035392013004ND
2018-05-1035392013001ND
2018-05-1035392013002ND
2018-05-1035392013003ND
2018-05-1035392013004ND
2018-08-1535411592001ND
2018-08-1535411592002ND
2018-08-1535411592003ND
2018-08-1535411592004ND
2018-08-1535411592001ND
2018-08-1535411592002ND
2018-08-1535411592003ND
2018-08-1535411592004ND
2018-11-1635432197001ND
2018-11-1635432197002ND
2018-11-1635432197003ND
2018-11-1635432197004ND
2018-11-1635432197001ND
2018-11-1635432197002ND
2018-11-1635432197003ND
2018-11-1635432197004ND
2019-02-2135450236001ND
2019-02-2135450236002ND
2019-02-2135450236003ND
2019-02-21354502360040.440 ppb
2019-02-2135450236001ND
2019-02-2135450236002ND
2019-02-2135450236003ND
2019-02-21354502360040.440 ppb
2019-05-17354695070010.640 ppb
2019-05-17354695070020.440 ppb
2019-05-1735469507003ND
2019-05-17354695070040.710 ppb
2019-05-17354695070010.640 ppb
2019-05-17354695070020.440 ppb
2019-05-1735469507003ND
2019-05-17354695070040.710 ppb
2019-08-23354929990010.370 ppb
2019-08-23354929990021.000 ppb
2019-08-23354929990030.260 ppb
2019-08-2335492999004ND
2019-08-23354929990010.370 ppb
2019-08-23354929990021.000 ppb
2019-08-23354929990030.260 ppb
2019-08-2335492999004ND
2019-11-14355128070010.470 ppb
2019-11-14355128070020.300 ppb
2019-11-1435512807003ND
2019-11-14355128070040.450 ppb
2019-11-14355128070010.470 ppb
2019-11-14355128070020.300 ppb
2019-11-1435512807003ND
2019-11-14355128070040.450 ppb