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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

City of Bogalusa 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

 

202

Samples

0

Samples exceeding legal limit (MCL)

154

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.21 ppb4228ND - 3.90 ppb
20151.56 ppb3226ND - 6.60 ppb
20160.828 ppb3220ND - 2.10 ppb
20171.59 ppb3226ND - 3.90 ppb
20181.11 ppb3230ND - 1.80 ppb
20191.21 ppb3226ND - 2.40 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
2014-01-062011557380.890 ppb
2014-01-062011557390.500 ppb
2014-01-062011557401.60 ppb
2014-01-062011557411.60 ppb
2014-01-062011557380.890 ppb
2014-01-062011557390.500 ppb
2014-01-062011557401.60 ppb
2014-01-062011557411.60 ppb
2014-04-102025520011.50 ppb
2014-04-10202552002ND
2014-04-102025520032.00 ppb
2014-04-102025520041.40 ppb
2014-04-102025520011.50 ppb
2014-04-10202552002ND
2014-04-102025520032.00 ppb
2014-04-102025520041.40 ppb
2014-07-102065910011.60 ppb
2014-07-10206591002ND
2014-07-102065910031.50 ppb
2014-07-102065910043.90 ppb
2014-07-102065910011.60 ppb
2014-07-10206591002ND
2014-07-102065910031.50 ppb
2014-07-102065910043.90 ppb
2014-10-0620105410012.30 ppb
2014-10-0620105410022.60 ppb
2014-10-062010541003ND
2014-10-0620105410041.90 ppb
2014-10-0620105410012.30 ppb
2014-10-0620105410022.60 ppb
2014-10-062010541003ND
2014-10-0620105410041.90 ppb
2014-11-05AD99249ND
2014-11-05AD992502.04 ppb
2014-11-05AD99251ND
2014-11-05AD99252ND
2014-11-05AD99253ND
2014-11-05AD99249ND
2014-11-05AD992502.04 ppb
2014-11-05AD99251ND
2014-11-05AD99252ND
2014-11-05AD99253ND
2015-01-0920145120011.30 ppb
2015-01-0920145120021.000 ppb
2015-01-0920146120031.10 ppb
2015-01-092014612004ND
2015-01-0920145120011.30 ppb
2015-01-0920145120021.000 ppb
2015-01-0920146120031.10 ppb
2015-01-092014612004ND
2015-04-0920183720011.20 ppb
2015-04-0920183720020.600 ppb
2015-04-0920183720031.90 ppb
2015-04-0920183720042.60 ppb
2015-04-0920183720011.20 ppb
2015-04-0920183720020.600 ppb
2015-04-0920183720031.90 ppb
2015-04-0920183720042.60 ppb
2015-07-0720223760012.20 ppb
2015-07-072022376002ND
2015-07-0720223760031.80 ppb
2015-07-0720223760046.60 ppb
2015-07-0720223760012.20 ppb
2015-07-072022376002ND
2015-07-0720223760031.80 ppb
2015-07-0720223760046.60 ppb
2015-10-0620267880011.50 ppb
2015-10-062026788002ND
2015-10-0620267880031.40 ppb
2015-10-0620267880041.80 ppb
2015-10-0620267880011.50 ppb
2015-10-062026788002ND
2015-10-0620267880031.40 ppb
2015-10-0620267880041.80 ppb
2016-01-042030720001ND
2016-01-042030720002ND
2016-01-0420307200031.40 ppb
2016-01-0420307200041.50 ppb
2016-01-042030720001ND
2016-01-042030720002ND
2016-01-0420307200031.40 ppb
2016-01-0420307200041.50 ppb
2016-04-072034973001ND
2016-04-0720349740011.20 ppb
2016-04-072034975001ND
2016-04-072034976001ND
2016-04-072034973001ND
2016-04-0720349740011.20 ppb
2016-04-072034975001ND
2016-04-072034976001ND
2016-07-0620394230010.650 ppb
2016-07-0620394290011.000 ppb
2016-07-0620394300012.10 ppb
2016-07-062039480011.60 ppb
2016-07-0620394230010.650 ppb
2016-07-0620394290011.000 ppb
2016-07-0620394300012.10 ppb
2016-07-062039480011.60 ppb
2016-10-1020439520011.20 ppb
2016-10-102043953001ND
2016-10-1020439550011.30 ppb
2016-10-1020439560011.30 ppb
2016-10-1020439520011.20 ppb
2016-10-102043953001ND
2016-10-1020439550011.30 ppb
2016-10-1020439560011.30 ppb
2017-01-13352888720010.840 ppb
2017-01-1335288872002ND
2017-01-13352888720031.000 ppb
2017-01-1335288872004ND
2017-01-13352888720010.840 ppb
2017-01-1335288872002ND
2017-01-13352888720031.000 ppb
2017-01-1335288872004ND
2017-04-05353051640011.30 ppb
2017-04-05353051640021.80 ppb
2017-04-05353051640032.30 ppb
2017-04-05353051640043.00 ppb
2017-04-05353051640011.30 ppb
2017-04-05353051640021.80 ppb
2017-04-05353051640032.30 ppb
2017-04-05353051640043.00 ppb
2017-07-06353225150293.90 ppb
2017-07-06353225150301.80 ppb
2017-07-0635322515031ND
2017-07-06353225150322.20 ppb
2017-07-06353225150293.90 ppb
2017-07-06353225150301.80 ppb
2017-07-0635322515031ND
2017-07-06353225150322.20 ppb
2017-10-04353405060012.60 ppb
2017-10-04353405060020.610 ppb
2017-10-04353405060031.90 ppb
2017-10-04353405060042.20 ppb
2017-10-04353405060012.60 ppb
2017-10-04353405060020.610 ppb
2017-10-04353405060031.90 ppb
2017-10-04353405060042.20 ppb
2018-01-12353684070011.20 ppb
2018-01-12353684070020.690 ppb
2018-01-12353684070030.400 ppb
2018-01-12353684070040.700 ppb
2018-01-12353684070011.20 ppb
2018-01-12353684070020.690 ppb
2018-01-12353684070030.400 ppb
2018-01-12353684070040.700 ppb
2018-04-05353846300011.30 ppb
2018-04-05353846300020.520 ppb
2018-04-05353846300031.40 ppb
2018-04-05353846300041.80 ppb
2018-04-05353846300011.30 ppb
2018-04-05353846300020.520 ppb
2018-04-05353846300031.40 ppb
2018-04-05353846300041.80 ppb
2018-07-05354025390011.40 ppb
2018-07-05354025390021.40 ppb
2018-07-05354025390031.30 ppb
2018-07-05354025390041.50 ppb
2018-07-05354025390011.40 ppb
2018-07-05354025390021.40 ppb
2018-07-05354025390031.30 ppb
2018-07-05354025390041.50 ppb
2018-10-04354225490011.70 ppb
2018-10-0435422549002ND
2018-10-04354225490031.10 ppb
2018-10-04354225490041.30 ppb
2018-10-04354225490011.70 ppb
2018-10-0435422549002ND
2018-10-04354225490031.10 ppb
2018-10-04354225490041.30 ppb
2019-01-11354418650011.10 ppb
2019-01-11354418650020.510 ppb
2019-01-11354418650031.30 ppb
2019-01-11354418650041.10 ppb
2019-01-11354418650011.10 ppb
2019-01-11354418650020.510 ppb
2019-01-11354418650031.30 ppb
2019-01-11354418650041.10 ppb
2019-04-05354599590011.60 ppb
2019-04-0535459959002ND
2019-04-05354599590031.30 ppb
2019-04-05354599590041.20 ppb
2019-04-05354599590011.60 ppb
2019-04-0535459959002ND
2019-04-05354599590031.30 ppb
2019-04-05354599590041.20 ppb
2019-07-19354836710012.00 ppb
2019-07-1935483671002ND
2019-07-19354836710031.70 ppb
2019-07-19354836710041.80 ppb
2019-07-19354836710012.00 ppb
2019-07-1935483671002ND
2019-07-19354836710031.70 ppb
2019-07-19354836710041.80 ppb
2019-10-04355028580012.40 ppb
2019-10-0435502858002ND
2019-10-04355028580031.70 ppb
2019-10-04355028580041.60 ppb
2019-10-04355028580012.40 ppb
2019-10-0435502858002ND
2019-10-04355028580031.70 ppb
2019-10-04355028580041.60 ppb