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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Coralville Muni Water System

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.

MORE ABOUT THIS CONTAMINANT

 

26

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND160ND
20150.500 ppb21ND - 1.000 ppb
20160.500 ppb21ND - 1.000 ppb
20170.500 ppb21ND - 1.000 ppb
20180.500 ppb21ND - 1.000 ppb
20191.000 ppb21ND - 2.00 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
2014-01-132030317ND
2014-01-132030318ND
2014-01-132030319ND
2014-01-132030316ND
2014-04-142045967ND
2014-04-142045974ND
2014-04-142045975ND
2014-04-142045976ND
2014-07-162064214ND
2014-07-162064215ND
2014-07-162064216ND
2014-07-162064217ND
2014-10-172086564ND
2014-10-172086566ND
2014-10-172086565ND
2014-10-172086562ND
2015-07-20OE2693201.000 ppb
2015-07-20OE269321ND
2016-07-19OE403115ND
2016-07-19OE4031141.000 ppb
2017-07-11OE535095ND
2017-07-11OE5350961.000 ppb
2018-07-20OE686441ND
2018-07-20OE6864421.000 ppb
2019-07-23OE838838ND
2019-07-23OE8388392.00 ppb