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EWG's Tap Water Database — 2019 UPDATE

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Dichloroacetic acid

Waterloo Water Works

Dichloroacetic 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)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.350 ppb81ND - 2.80 ppb
2013ND120ND
2014ND20ND
20151.70 ppb21ND - 3.39 ppb
20160.960 ppb21ND - 1.92 ppb
20171.72 ppb221.68 ppb - 1.75 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.2 ppb

The EWG Health Guideline of 0.2 ppb for dichloroacetic 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
2012-07-191918820ND
2012-07-191918819ND
2012-07-191918818ND
2012-07-1919188172.80 ppb
2012-10-311944627ND
2012-10-311944628ND
2012-10-311944629ND
2012-10-311944630ND
2013-01-221958024ND
2013-01-221958025ND
2013-01-221958026ND
2013-01-221958027ND
2013-04-111973815ND
2013-04-111973817ND
2013-04-111973816ND
2013-04-111973814ND
2013-07-181993049ND
2013-07-181993050ND
2013-07-181993051ND
2013-07-181993052ND
2014-07-162065520ND
2014-07-162065521ND
2015-07-071G50517-01ND
2015-07-071G50517-023.39 ppb
2016-07-201G61634-011.92 ppb
2016-07-201G61634-02ND
2017-07-111G70795-011.68 ppb
2017-07-111G70795-021.75 ppb