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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Crescenta Valley CWD

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

 

135

Samples

0

Samples exceeding legal limit (MCL)

103

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20144.45 ppb16162.90 ppb - 6.80 ppb
20153.91 ppb16162.40 ppb - 6.60 ppb
20166.41 ppb16162.60 ppb - 15.0 ppb
20176.05 ppb16161.70 ppb - 15.0 ppb
20183.64 ppb20201.60 ppb - 6.80 ppb
20190.904 ppb5119ND - 4.50 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
2014-02-045806-800-10344.50 ppb
2014-02-045806-801-08504.10 ppb
2014-02-045806-802-11503.90 ppb
2014-02-045806-803-10204.40 ppb
2014-05-065806-008-11474.80 ppb
2014-05-065806-801-11204.10 ppb
2014-05-065806-802-10173.40 ppb
2014-05-065806-803-12004.00 ppb
2014-08-055806-800-10146.30 ppb
2014-08-055806-801-09375.90 ppb
2014-08-055806-802-11524.30 ppb
2014-08-055806-803-11206.80 ppb
2014-11-065806-800-11363.90 ppb
2014-11-065806-801-11214.00 ppb
2014-11-065806-802-11112.90 ppb
2014-11-065806-803-11503.90 ppb
2015-02-035806-800-08492.90 ppb
2015-02-035806-801-08033.20 ppb
2015-02-035806-802-09102.90 ppb
2015-02-035806-803-08583.00 ppb
2015-05-055806-800-12052.40 ppb
2015-05-055806-801-08572.80 ppb
2015-05-055806-802-10054.20 ppb
2015-05-055806-803-11554.50 ppb
2015-08-045806-800-10176.60 ppb
2015-08-045806-801-11205.30 ppb
2015-08-045806-802-11104.60 ppb
2015-08-045806-803-10025.10 ppb
2015-11-035806-800-10104.40 ppb
2015-11-035806-801-10553.50 ppb
2015-11-035806-802-10013.30 ppb
2015-11-035806-803-10283.80 ppb
2016-02-025806-800-10554.10 ppb
2016-02-025806-801-10153.10 ppb
2016-02-025806-802-10402.60 ppb
2016-02-025806-803-10403.60 ppb
2016-05-045806-800-10486.20 ppb
2016-05-045806-801-11056.80 ppb
2016-05-045806-802-10228.50 ppb
2016-05-045806-803-10337.00 ppb
2016-08-025806-800-12107.70 ppb
2016-08-025806-801-123011.0 ppb
2016-08-025806-802-124015.0 ppb
2016-08-025806-803-115812.0 ppb
2016-11-085806-800-09364.20 ppb
2016-11-085806-801-09153.80 ppb
2016-11-085806-802-09232.70 ppb
2016-11-085806-803-09514.20 ppb
2017-02-075806-800-10374.90 ppb
2017-02-075806-801-10503.40 ppb
2017-02-075806-802-10263.00 ppb
2017-02-075806-803-10204.40 ppb
2017-05-025806-800-090515.0 ppb
2017-05-025806-801-085110.00 ppb
2017-05-025806-802-123010.00 ppb
2017-05-025806-803-09209.90 ppb
2017-08-015806-800-10001.70 ppb
2017-08-015806-801-09405.10 ppb
2017-08-015806-802-11512.70 ppb
2017-08-015806-803-10159.00 ppb
2017-11-075806-800-10005.70 ppb
2017-11-075806-801-10354.50 ppb
2017-11-075806-802-11432.50 ppb
2017-11-075806-803-09405.00 ppb
2018-02-065806-800-10155.20 ppb
2018-02-065806-801-10395.60 ppb
2018-02-065806-802-09412.90 ppb
2018-02-065806-803-10006.50 ppb
2018-05-025806-800-09502.90 ppb
2018-05-025806-801-10253.00 ppb
2018-05-025806-802-10471.60 ppb
2018-05-025806-803-09302.30 ppb
2018-08-095806-800-08005.10 ppb
2018-08-095806-801-09304.10 ppb
2018-08-095806-802-13576.80 ppb
2018-08-095806-803-08155.90 ppb
2018-11-065806-800-10452.70 ppb
2018-11-065806-801-09452.70 ppb
2018-11-065806-802-12212.10 ppb
2018-11-065806-803-11002.70 ppb
2018-11-135806-800-10402.40 ppb
2018-11-135806-801-09402.90 ppb
2018-11-135806-802-10112.50 ppb
2018-11-135806-803-12302.90 ppb
2019-01-155806-800-10153.30 ppb
2019-01-155806-801-09123.30 ppb
2019-01-155806-802-09253.40 ppb
2019-01-155806-803-10003.60 ppb
2019-03-055806-800-11352.70 ppb
2019-03-055806-801-10502.20 ppb
2019-03-055806-802-12302.50 ppb
2019-03-125806-803-11032.40 ppb
2019-04-025806-800-11001.50 ppb
2019-04-025806-801-09401.40 ppb
2019-04-025806-802-10031.70 ppb
2019-04-025806-803-10401.70 ppb
2019-05-075806-800-10452.60 ppb
2019-05-075806-801-11051.80 ppb
2019-05-075806-802-11461.40 ppb
2019-05-075806-803-10051.10 ppb
2019-06-045806-800-1010ND
2019-06-045806-801-1035ND
2019-06-045806-802-1128ND
2019-06-045806-803-0950ND
2019-06-255806-028-0958ND
2019-07-025806-028-1225ND
2019-07-025806-800-0930ND
2019-07-025806-801-1015ND
2019-07-025806-802-1000ND
2019-07-025806-803-0945ND
2019-08-055806-800-12584.50 ppb
2019-08-055806-801-1225ND
2019-08-055806-802-1237ND
2019-08-055806-803-1315ND
2019-08-065806-028-1001ND
2019-09-035806-028-1240ND
2019-09-175806-800-1120ND
2019-09-175806-801-09302.20 ppb
2019-09-175806-802-1008ND
2019-09-175806-803-10572.80 ppb
2019-10-015806-028-1123ND
2019-10-155806-800-1036ND
2019-10-155806-801-1030ND
2019-10-155806-802-1020ND
2019-10-155806-803-1109ND
2019-11-045806-028-1227ND
2019-11-045806-800-1000ND
2019-11-045806-801-0915ND
2019-11-045806-802-1314ND
2019-11-045806-803-1015ND
2019-12-035806-028-1154ND
2019-12-175806-800-1027ND
2019-12-175806-801-0940ND
2019-12-175806-802-1052ND
2019-12-175806-803-1005ND