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EWG's Tap Water Database — 2019 UPDATE

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Trichloroacetic acid

Waterloo Water Works

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND80ND
20130.0950 ppb122ND - 0.630 ppb
20140.280 ppb21ND - 0.560 ppb
20151.38 ppb221.10 ppb - 1.65 ppb
20160.815 ppb220.730 ppb - 0.900 ppb
20170.915 ppb220.770 ppb - 1.06 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for trichloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.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
2012-07-191918819ND
2012-07-191918817ND
2012-07-191918818ND
2012-07-191918820ND
2012-10-311944629ND
2012-10-311944627ND
2012-10-311944628ND
2012-10-311944630ND
2013-01-221958027ND
2013-01-2219580260.630 ppb
2013-01-221958025ND
2013-01-2219580240.510 ppb
2013-04-111973814ND
2013-04-111973817ND
2013-04-111973816ND
2013-04-111973815ND
2013-07-181993049ND
2013-07-181993050ND
2013-07-181993051ND
2013-07-181993052ND
2014-07-162065521ND
2014-07-1620655200.560 ppb
2015-07-071G50517-011.10 ppb
2015-07-071G50517-021.65 ppb
2016-07-201G61634-010.900 ppb
2016-07-201G61634-020.730 ppb
2017-07-111G70795-010.770 ppb
2017-07-111G70795-021.06 ppb