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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Brunswick

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

 

108

Samples

0

Samples exceeding legal limit (MCL)

75

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.70 ppb1615ND - 4.20 ppb
20151.33 ppb2113ND - 2.80 ppb
20161.98 ppb1612ND - 3.90 ppb
20171.55 ppb1611ND - 2.90 ppb
20181.26 ppb2313ND - 3.30 ppb
20191.81 ppb1611ND - 3.80 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
2014-02-24AI285422.50 ppb
2014-02-24AI285432.90 ppb
2014-02-24AI285442.50 ppb
2014-02-24AI285454.20 ppb
2014-05-28AI415742.90 ppb
2014-05-28AI415752.30 ppb
2014-05-28AI415763.10 ppb
2014-05-28AI41577ND
2014-08-27AI516203.40 ppb
2014-08-27AI516212.20 ppb
2014-08-27AI516223.30 ppb
2014-08-27AI516233.40 ppb
2014-11-24AI601132.50 ppb
2014-11-24AI601141.90 ppb
2014-11-24AI601152.20 ppb
2014-11-24AI601163.90 ppb
2015-02-23AI653071.40 ppb
2015-02-23AI653082.10 ppb
2015-02-23AI653091.40 ppb
2015-02-23AI65310ND
2015-05-27AI782152.20 ppb
2015-05-27AI782162.70 ppb
2015-05-27AI782172.30 ppb
2015-05-27AI78218ND
2015-06-01AI78363ND
2015-06-01AI78364ND
2015-06-01AI78365ND
2015-06-01AI78366ND
2015-06-01AI783670.750 ppb
2015-08-25AI875672.70 ppb
2015-08-25AI875682.60 ppb
2015-08-25AI875692.80 ppb
2015-08-25AI87570ND
2015-11-23AJ015412.50 ppb
2015-11-23AJ015421.90 ppb
2015-11-23AJ015432.50 ppb
2015-11-23AJ01544ND
2016-02-22AJ068282.10 ppb
2016-02-22AJ068291.40 ppb
2016-02-22AJ068302.20 ppb
2016-02-22AJ06831ND
2016-05-23AJ126973.40 ppb
2016-05-23AJ126982.90 ppb
2016-05-23AJ126993.90 ppb
2016-05-23AJ12700ND
2016-08-23AJ236832.90 ppb
2016-08-23AJ236843.70 ppb
2016-08-23AJ236853.00 ppb
2016-08-23AJ23686ND
2016-11-21AJ339712.00 ppb
2016-11-21AJ339722.00 ppb
2016-11-21AJ339732.10 ppb
2016-11-21AJ33974ND
2017-02-22AJ469372.30 ppb
2017-02-22AJ469382.90 ppb
2017-02-22AJ469392.20 ppb
2017-02-22AJ46940ND
2017-05-23AJ559721.90 ppb
2017-05-23AJ559732.90 ppb
2017-05-23AJ559741.90 ppb
2017-05-23AJ55975ND
2017-08-22AJ652952.20 ppb
2017-08-22AJ652962.90 ppb
2017-08-22AJ652972.20 ppb
2017-08-22AJ65298ND
2017-11-20AJ740661.70 ppb
2017-11-20AJ74067ND
2017-11-20AJ740681.70 ppb
2017-11-20AJ74069ND
2018-03-05AJ848461.10 ppb
2018-03-05AJ848471.90 ppb
2018-03-05AJ848481.60 ppb
2018-03-05AJ84849ND
2018-05-21AJ898622.90 ppb
2018-05-21AJ898632.20 ppb
2018-05-21AJ898642.40 ppb
2018-05-21AJ89865ND
2018-07-17AJ94515ND
2018-07-17AJ94516ND
2018-07-17AJ94517ND
2018-07-17AJ945181.40 ppb
2018-07-17AJ94519ND
2018-07-17AJ94520ND
2018-07-17AJ94521ND
2018-08-27AJ990212.90 ppb
2018-08-27AJ990222.90 ppb
2018-08-27AJ990232.30 ppb
2018-08-27AJ99024ND
2018-11-19AK063481.90 ppb
2018-11-19AK063492.10 ppb
2018-11-19AK063503.30 ppb
2018-11-19AK06351ND
2019-02-25AK119362.30 ppb
2019-02-25AK119372.50 ppb
2019-02-25AK119381.80 ppb
2019-02-25AK11939ND
2019-05-20AK178332.10 ppb
2019-05-20AK178343.10 ppb
2019-05-20AK178353.20 ppb
2019-05-20AK17836ND
2019-08-26AK280603.80 ppb
2019-08-26AK280612.80 ppb
2019-08-26AK280622.30 ppb
2019-08-26AK28063ND
2019-11-18AK369732.80 ppb
2019-11-18AK36974ND
2019-11-18AK369752.30 ppb
2019-11-18AK36976ND