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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Americus

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

 

78

Samples

0

Samples exceeding legal limit (MCL)

49

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.30 ppb1812ND - 10.00 ppb
20152.92 ppb1611ND - 9.70 ppb
20162.11 ppb1811ND - 10.00 ppb
20172.18 ppb1611ND - 5.90 ppb
20181.07 ppb63ND - 3.30 ppb
20190.575 ppb41ND - 2.30 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
2014-01-28AI27248ND
2014-01-28AI27247ND
2014-02-27AI288461.20 ppb
2014-02-27AI288451.30 ppb
2014-02-27AI28844ND
2014-02-27AI288434.60 ppb
2014-05-27AI414625.30 ppb
2014-05-27AI414632.70 ppb
2014-05-27AI414641.80 ppb
2014-05-27AI41465ND
2014-08-26AI514851.30 ppb
2014-08-26AI514842.10 ppb
2014-08-26AI514835.10 ppb
2014-08-26AI5148210.00 ppb
2014-11-24AI60110ND
2014-11-24AI601091.70 ppb
2014-11-24AI60108ND
2014-11-24AI601074.30 ppb
2015-02-23AI65369ND
2015-02-23AI653663.20 ppb
2015-02-23AI65367ND
2015-02-23AI65368ND
2015-05-27AI78224ND
2015-05-27AI782231.80 ppb
2015-05-27AI782224.70 ppb
2015-05-27AI782219.70 ppb
2015-08-26AI876823.50 ppb
2015-08-26AI87681ND
2015-08-26AI876805.40 ppb
2015-08-26AI876795.30 ppb
2015-11-23AJ016151.60 ppb
2015-11-23AJ016142.50 ppb
2015-11-23AJ016131.50 ppb
2015-11-23AJ016127.50 ppb
2016-02-24AJ070553.50 ppb
2016-02-24AJ07056ND
2016-02-24AJ070571.20 ppb
2016-02-24AJ07058ND
2016-05-23AJ12732ND
2016-05-23AJ127312.30 ppb
2016-05-23AJ127304.30 ppb
2016-05-23AJ1272910.00 ppb
2016-08-23AJ23754ND
2016-08-23AJ237532.60 ppb
2016-08-23AJ237527.00 ppb
2016-08-23AJ237512.90 ppb
2016-10-25AJ32158ND
2016-10-25AJ32157ND
2016-11-21AJ33984ND
2016-11-21AJ339811.000 ppb
2016-11-21AJ339821.20 ppb
2016-11-21AJ339832.00 ppb
2017-02-21AJ46780ND
2017-02-21AJ467791.60 ppb
2017-02-21AJ46778ND
2017-02-21AJ467771.40 ppb
2017-05-23AJ559872.70 ppb
2017-05-23AJ55985ND
2017-05-23AJ559862.80 ppb
2017-05-23AJ55988ND
2017-08-23AJ654475.70 ppb
2017-08-23AJ654464.30 ppb
2017-08-23AJ654453.00 ppb
2017-08-23AJ654445.90 ppb
2017-11-20AJ740921.70 ppb
2017-11-20AJ74093ND
2017-11-20AJ740943.30 ppb
2017-11-20AJ740952.50 ppb
2018-02-27AJ84647ND
2018-02-27AJ846461.80 ppb
2018-02-27AJ846451.30 ppb
2018-02-27AJ84644ND
2018-08-08AJ971503.30 ppb
2018-08-08AJ97149ND
2019-07-30AK23846ND
2019-07-30AK23845ND
2019-08-22AK27872ND
2019-08-22AK278732.30 ppb