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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Ruidoso Downs 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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
20150.0900 ppb21ND - 0.180 ppb
2016ND20ND
2017ND20ND
2018ND20ND
20190.363 ppb21ND - 0.726 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
2014-08-181408930-001AND
2015-08-1420150237470.180 ppb
2015-09-232015028621ND
2016-08-101608647-001AND
2016-09-141609797-001AND
2017-08-141708A46-001ND
2017-09-111709597-001ND
2018-08-211808E42-001ND
2018-09-101809578-001ND
2019-08-191908C78-001ND
2019-09-091909499-0010.726 ppb