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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

East Rio Hondo WSC

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

64

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20142.31 ppb1612ND - 6.00 ppb
20151.63 ppb1615ND - 2.40 ppb
20161.18 ppb1612ND - 2.00 ppb
20171.29 ppb1612ND - 2.60 ppb
20180.831 ppb1610ND - 1.90 ppb
20190.200 ppb163ND - 1.20 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
2014-03-06AC459332.50 ppb
2014-03-06AC45939ND
2014-03-06AC459712.00 ppb
2014-03-06AC459352.50 ppb
2014-06-06AC563136.00 ppb
2014-06-06AC56282ND
2014-06-06AC563126.00 ppb
2014-06-06AC562855.60 ppb
2014-09-09AC664122.60 ppb
2014-09-09AC663732.60 ppb
2014-09-09AC66372ND
2014-09-09AC664132.40 ppb
2014-11-20AC726611.90 ppb
2014-11-20AC72644ND
2014-11-20AC726421.60 ppb
2014-11-20AC726501.20 ppb
2015-03-18AC849811.50 ppb
2015-03-18AC849701.60 ppb
2015-03-18AC849731.40 ppb
2015-03-18AC849771.70 ppb
2015-06-17AC962481.60 ppb
2015-06-17AC962751.70 ppb
2015-06-17AC962471.70 ppb
2015-06-17AC962491.90 ppb
2015-09-23AD081872.20 ppb
2015-09-23AD08202ND
2015-09-23AD081842.20 ppb
2015-09-23AD081882.40 ppb
2015-12-01AD148592.00 ppb
2015-12-01AD148561.000 ppb
2015-12-01AD149061.40 ppb
2015-12-01AD148551.70 ppb
2016-02-25AD257041.80 ppb
2016-02-25AD256791.000 ppb
2016-02-25AD25699ND
2016-02-25AD256781.000 ppb
2016-05-17AD369891.90 ppb
2016-05-17AD36990ND
2016-05-17AD369871.70 ppb
2016-05-17AD369881.70 ppb
2016-09-27AD514831.90 ppb
2016-09-27AD51454ND
2016-09-27AD514371.90 ppb
2016-09-27AD514842.00 ppb
2016-12-09AD616211.50 ppb
2016-12-09AD616231.40 ppb
2016-12-09AD61622ND
2016-12-09AD616241.10 ppb
2017-03-03AD734071.50 ppb
2017-03-03AD73408ND
2017-03-03AD734091.40 ppb
2017-03-03AD734101.50 ppb
2017-05-19AD850321.20 ppb
2017-05-19AD85029ND
2017-05-19AD850351.20 ppb
2017-05-19AD850361.20 ppb
2017-09-07AD951032.10 ppb
2017-09-07AD951152.60 ppb
2017-09-07AD95099ND
2017-09-07AD951042.60 ppb
2017-11-30AE063291.90 ppb
2017-11-30AE06326ND
2017-11-30AE063301.50 ppb
2017-11-30AE063221.90 ppb
2018-02-01AE117981.40 ppb
2018-02-01AE11799ND
2018-02-01AE118011.000 ppb
2018-03-07AE172361.40 ppb
2018-06-05AE28648ND
2018-06-05AE286441.20 ppb
2018-06-05AE286431.10 ppb
2018-06-05AE28649ND
2018-08-28AE386781.20 ppb
2018-08-28AE38676ND
2018-08-28AE386751.000 ppb
2018-08-28AE386771.20 ppb
2018-11-29AE473761.90 ppb
2018-11-29AE47367ND
2018-11-29AE47375ND
2018-11-29AE473731.90 ppb
2019-02-19AE55016ND
2019-02-19AE55026ND
2019-02-19AE55017ND
2019-02-19AE55024ND
2019-06-06AE694061.000 ppb
2019-06-06AE69409ND
2019-06-06AE69407ND
2019-06-06AE69410ND
2019-07-18AE749841.20 ppb
2019-07-18AE749831.000 ppb
2019-07-18AE74988ND
2019-07-18AE74987ND
2019-11-26AE90563ND
2019-11-26AE90573ND
2019-11-26AE90575ND
2019-11-26AE90562ND