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Trichloroacetic acid

Marion Municipal Water Department

Trichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20100.285 ppb21ND - 0.570 ppb
2011ND20ND
20125.27 ppb225.27 ppb
2013ND10ND
2014ND20ND
20150.705 ppb220.600 ppb - 0.810 ppb

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.5 ppb

The health guideline of 0.5 ppb for trichloroacetic acid was defined by the Environmental Protection Agency 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.

EPA Maximum Contaminant
Level Goal (MCLG)20.0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Lab ID Result
2010-07-2117716420.570 ppb
2010-07-211771643ND
2011-07-181842902ND
2011-07-181842901ND
2012-07-2419195365.27 ppb
2012-07-2419195355.27 ppb
2013-07-301997643ND
2014-07-162065518ND
2014-07-162065519ND
2015-07-141G51128-020.600 ppb
2015-07-141G51128-010.810 ppb