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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Los Lunas 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

 

72

Samples

0

Samples exceeding legal limit (MCL)

17

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
20150.192 ppb82ND - 0.904 ppb
20160.195 ppb168ND - 0.910 ppb
20170.188 ppb165ND - 1.000 ppb
20180.168 ppb164ND - 1.000 ppb
20190.129 ppb164ND - 0.710 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
2015-07-292015021719ND
2015-07-292015021721ND
2015-07-292015021717ND
2015-07-2920150217160.630 ppb
2015-11-041511221-001A0.904 ppb
2015-11-041511213-001AND
2015-11-041511215-001AND
2015-11-041511217-001AND
2016-02-251602A77-001AND
2016-02-251602A75-001AND
2016-02-251602A76-001AND
2016-02-251602A74-001A0.570 ppb
2016-04-1120160101650.630 ppb
2016-04-112016010166ND
2016-04-112016010167ND
2016-04-112016010168ND
2016-07-072016019228ND
2016-07-0720160192310.110 ppb
2016-07-0720160192300.120 ppb
2016-07-0720160192290.910 ppb
2016-10-1120160294660.140 ppb
2016-10-1120160294650.130 ppb
2016-10-112016029467ND
2016-10-1120160294640.510 ppb
2017-01-0420170001710.570 ppb
2017-01-042017000170ND
2017-01-042017000169ND
2017-01-042017000168ND
2017-04-0420170096180.600 ppb
2017-04-042017009615ND
2017-04-042017009616ND
2017-04-042017009617ND
2017-07-1220170199210.630 ppb
2017-07-122017019920ND
2017-07-122017019923ND
2017-07-122017019922ND
2017-10-102017029141ND
2017-10-1020170291421.000 ppb
2017-10-1020170291400.200 ppb
2017-10-102017029139ND
2018-01-172018001598ND
2018-01-1720180015970.290 ppb
2018-01-172018001596ND
2018-01-172018001595ND
2018-04-112018010250ND
2018-04-112018010247ND
2018-04-112018010248ND
2018-04-1120180102490.820 ppb
2018-07-102018018580ND
2018-07-102018018579ND
2018-07-1020180185781.000 ppb
2018-07-102018018577ND
2018-10-0320180283520.570 ppb
2018-10-032018028353ND
2018-10-032018028354ND
2018-10-032018028355ND
2019-01-082019000454ND
2019-01-082019000455ND
2019-01-0820190004560.490 ppb
2019-01-082019000457ND
2019-04-032019008329ND
2019-04-032019008332ND
2019-04-032019008331ND
2019-04-0320190083300.420 ppb
2019-07-152019019199ND
2019-07-1520190192010.710 ppb
2019-07-152019019200ND
2019-07-152019019198ND
2019-10-162019029569ND
2019-10-162019029568ND
2019-10-162019029567ND
2019-10-1620190295660.440 ppb