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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Cal American Water Company

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

 

184

Samples

0

Samples exceeding legal limit (MCL)

60

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.23 ppb2418ND - 4.60 ppb
20151.03 ppb3224ND - 1.60 ppb
20160.144 ppb324ND - 1.40 ppb
20170.266 ppb324ND - 2.30 ppb
20180.234 ppb325ND - 2.20 ppb
20190.206 ppb325ND - 1.40 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
2014-05-071225-006-13301.30 ppb
2014-05-071225-007-14151.60 ppb
2014-05-071225-008-09451.50 ppb
2014-05-071225-009-15101.50 ppb
2014-05-071225-010-10301.40 ppb
2014-05-071225-011-11051.50 ppb
2014-05-071225-012-12254.60 ppb
2014-05-071225-013-11501.30 ppb
2014-08-121225-006-11351.90 ppb
2014-08-121225-007-14101.20 ppb
2014-08-121225-008-13501.80 ppb
2014-08-121225-009-14251.30 ppb
2014-08-121225-010-13151.70 ppb
2014-08-121225-011-12101.60 ppb
2014-08-121225-012-10001.60 ppb
2014-08-121225-013-10551.40 ppb
2014-11-111225-006-1500ND
2014-11-111225-007-14001.20 ppb
2014-11-111225-008-1320ND
2014-11-111225-009-1430ND
2014-11-111225-010-1250ND
2014-11-111225-011-1230ND
2014-11-111225-012-15451.10 ppb
2014-11-111225-013-1520ND
2015-02-101225-006-1450ND
2015-02-101225-007-0933ND
2015-02-101225-008-1015ND
2015-02-101225-009-1515ND
2015-02-101225-010-1047ND
2015-02-101225-011-1120ND
2015-02-101225-012-14251.30 ppb
2015-02-101225-013-1350ND
2015-05-121225-006-13551.60 ppb
2015-05-121225-007-11501.40 ppb
2015-05-121225-008-11201.30 ppb
2015-05-121225-009-14201.40 ppb
2015-05-121225-010-10421.40 ppb
2015-05-121225-011-10001.40 ppb
2015-05-121225-012-13321.30 ppb
2015-05-121225-013-13001.30 ppb
2015-08-101225-006-13501.50 ppb
2015-08-101225-007-13251.50 ppb
2015-08-101225-008-10501.10 ppb
2015-08-101225-009-14101.60 ppb
2015-08-101225-010-11201.10 ppb
2015-08-101225-011-12001.30 ppb
2015-08-101225-012-09451.50 ppb
2015-08-101225-013-10151.20 ppb
2015-11-101225-006-11001.30 ppb
2015-11-101225-007-12001.60 ppb
2015-11-101225-008-11401.30 ppb
2015-11-101225-009-09301.30 ppb
2015-11-101225-010-10551.40 ppb
2015-11-101225-011-09501.30 ppb
2015-11-101225-012-13001.50 ppb
2015-11-101225-013-1200ND
2016-02-091225-006-1000ND
2016-02-091225-007-11501.40 ppb
2016-02-091225-008-09501.10 ppb
2016-02-091225-009-1210ND
2016-02-091225-010-10351.10 ppb
2016-02-091225-011-1120ND
2016-02-091225-012-1040ND
2016-02-091225-013-13051.000 ppb
2016-05-101225-006-0930ND
2016-05-101225-007-1030ND
2016-05-101225-008-0950ND
2016-05-101225-009-1155ND
2016-05-101225-010-1030ND
2016-05-101225-011-1055ND
2016-05-101225-012-1130ND
2016-05-101225-013-1100ND
2016-08-091225-006-1130ND
2016-08-091225-007-1100ND
2016-08-091225-008-1045ND
2016-08-091225-009-1000ND
2016-08-091225-010-1120ND
2016-08-091225-011-0950ND
2016-08-091225-012-1300ND
2016-08-091225-013-1208ND
2016-11-091225-006-1200ND
2016-11-091225-007-1445ND
2016-11-091225-008-1355ND
2016-11-091225-009-1315ND
2016-11-091225-010-1340ND
2016-11-091225-012-1045ND
2016-11-091225-013-1130ND
2016-11-111225-011-1010ND
2017-02-081225-006-1000ND
2017-02-081225-007-1300ND
2017-02-081225-008-1040ND
2017-02-081225-009-1050ND
2017-02-081225-010-1100ND
2017-02-081225-011-1200ND
2017-02-081225-012-1100ND
2017-02-081225-013-1315ND
2017-05-091225-006-1110ND
2017-05-091225-007-1330ND
2017-05-091225-008-1300ND
2017-05-091225-009-1200ND
2017-05-091225-010-1150ND
2017-05-091225-011-1115ND
2017-05-091225-012-1030ND
2017-05-091225-013-1030ND
2017-08-081225-006-1100ND
2017-08-081225-007-1130ND
2017-08-081225-008-1300ND
2017-08-081225-009-1030ND
2017-08-081225-010-1145ND
2017-08-081225-011-1100ND
2017-08-081225-012-1200ND
2017-08-081225-013-1000ND
2017-11-091225-006-1245ND
2017-11-091225-007-14352.20 ppb
2017-11-091225-008-14092.20 ppb
2017-11-091225-009-1300ND
2017-11-091225-010-13522.30 ppb
2017-11-091225-011-13371.80 ppb
2017-11-091225-012-1317ND
2017-11-091225-013-1315ND
2018-02-061225-006-1000ND
2018-02-061225-007-1100ND
2018-02-061225-008-1130ND
2018-02-061225-009-1030ND
2018-02-061225-010-1100ND
2018-02-061225-011-1200ND
2018-02-061225-012-1200ND
2018-02-061225-013-1015ND
2018-05-081225-006-09002.20 ppb
2018-05-081225-007-11001.20 ppb
2018-05-081225-008-11001.40 ppb
2018-05-081225-009-0930ND
2018-05-081225-010-10401.40 ppb
2018-05-081225-011-10121.30 ppb
2018-05-081225-012-1130ND
2018-05-081225-013-0950ND
2018-08-081225-006-1030ND
2018-08-081225-007-1130ND
2018-08-081225-008-1110ND
2018-08-081225-009-1100ND
2018-08-081225-010-1135ND
2018-08-081225-011-1155ND
2018-08-081225-012-1300ND
2018-08-081225-013-1040ND
2018-11-141225-006-1355ND
2018-11-141225-007-1455ND
2018-11-141225-008-1520ND
2018-11-141225-009-1425ND
2018-11-141225-010-1540ND
2018-11-141225-011-1555ND
2018-11-141225-012-1250ND
2018-11-141225-013-1320ND
2019-02-121225-006-1400ND
2019-02-121225-007-15001.40 ppb
2019-02-121225-008-1420ND
2019-02-121225-009-1430ND
2019-02-121225-010-1500ND
2019-02-121225-011-1440ND
2019-02-121225-012-1600ND
2019-02-121225-013-1600ND
2019-05-141225-006-1230ND
2019-05-141225-007-1330ND
2019-05-141225-008-1600ND
2019-05-141225-009-1300ND
2019-05-141225-010-1630ND
2019-05-141225-011-1530ND
2019-05-141225-012-1430ND
2019-05-141225-013-1400ND
2019-08-141225-006-1200ND
2019-08-141225-007-1300ND
2019-08-141225-008-13501.20 ppb
2019-08-141225-009-1230ND
2019-08-141225-010-13301.30 ppb
2019-08-141225-011-13001.30 ppb
2019-08-141225-012-1400ND
2019-08-141225-013-12301.40 ppb
2019-11-131225-006-1615ND
2019-11-131225-007-1749ND
2019-11-131225-009-1645ND
2019-11-131225-010-1707ND
2019-11-131225-011-1725ND
2019-11-131225-012-1409ND
2019-11-131225-013-1510ND
2019-11-211225-008-1108ND