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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Farmerville 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

 

76

Samples

0

Samples exceeding legal limit (MCL)

38

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.700 ppb42ND - 1.40 ppb
20152.05 ppb84ND - 4.30 ppb
20161.00 ppb1610ND - 3.30 ppb
20170.916 ppb1610ND - 3.40 ppb
20180.188 ppb162ND - 1.50 ppb
20191.28 ppb1612ND - 3.40 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
2014-08-27L0047420-02ND
2014-08-27L0047420-011.40 ppb
2014-08-27L0047420-02ND
2014-08-27L0047420-011.40 ppb
2015-08-12352029650013.90 ppb
2015-08-1235202965002ND
2015-08-1235202965002ND
2015-08-12352029650013.90 ppb
2015-11-10352163290014.30 ppb
2015-11-1035216329002ND
2015-11-1035216329002ND
2015-11-10352163290014.30 ppb
2016-02-03LA16930-12.10 ppb
2016-02-03LA16930-2ND
2016-02-03LA16930-2ND
2016-02-03LA16930-12.10 ppb
2016-05-11LA20591-13.30 ppb
2016-05-11LA20591-20.720 ppb
2016-05-11LA20591-20.720 ppb
2016-05-11LA20591-13.30 ppb
2016-08-17LA24430-11.10 ppb
2016-08-17LA24430-20.810 ppb
2016-08-17LA24430-20.810 ppb
2016-08-17LA24430-11.10 ppb
2016-11-23LA27915-2ND
2016-11-23LA27915-1ND
2016-11-23LA27915-2ND
2016-11-23LA27915-1ND
2017-02-0235292874014ND
2017-02-02352928740131.90 ppb
2017-02-02352928740131.90 ppb
2017-02-0235292874014ND
2017-05-1535312642006ND
2017-05-15353126420050.550 ppb
2017-05-15353126420050.550 ppb
2017-05-1535312642006ND
2017-08-1035329805009ND
2017-08-10353298050103.40 ppb
2017-08-10353298050103.40 ppb
2017-08-1035329805009ND
2017-11-15353491860021.20 ppb
2017-11-15353491860010.280 ppb
2017-11-15353491860010.280 ppb
2017-11-15353491860021.20 ppb
2018-02-2235376198001ND
2018-02-2235376198002ND
2018-02-2235376198001ND
2018-02-2235376198002ND
2018-05-2335394581001ND
2018-05-2335394581002ND
2018-05-2335394581001ND
2018-05-2335394581002ND
2018-08-2035412798001ND
2018-08-2035412798002ND
2018-08-2035412798001ND
2018-08-2035412798002ND
2018-11-1935432388001ND
2018-11-19354323880021.50 ppb
2018-11-1935432388001ND
2018-11-19354323880021.50 ppb
2019-02-25354509660021.30 ppb
2019-02-25354509660013.40 ppb
2019-02-25354509660013.40 ppb
2019-02-25354509660021.30 ppb
2019-05-1335469328002ND
2019-05-1335469328002ND
2019-05-1335469328001ND
2019-05-1335469328001ND
2019-08-14354912130021.90 ppb
2019-08-14354912130011.60 ppb
2019-08-14354912130011.60 ppb
2019-08-14354912130021.90 ppb
2019-11-18355140820010.920 ppb
2019-11-18355140820021.10 ppb
2019-11-18355140820010.920 ppb
2019-11-18355140820021.10 ppb