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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

El Segundo Water Department

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

 

192

Samples

0

Samples exceeding legal limit (MCL)

115

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20144.63 ppb32322.80 ppb - 8.20 ppb
20152.61 ppb32321.20 ppb - 4.70 ppb
20160.778 ppb3219ND - 2.00 ppb
20171.94 ppb3216ND - 8.70 ppb
20180.331 ppb328ND - 1.60 ppb
20190.363 ppb328ND - 1.50 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
2014-01-083761-800-08453.80 ppb
2014-01-083761-801-07543.80 ppb
2014-01-083761-802-09433.80 ppb
2014-01-083761-803-10073.70 ppb
2014-01-083761-804-11113.60 ppb
2014-01-083761-805-11243.50 ppb
2014-01-083761-806-11403.80 ppb
2014-01-083761-807-12073.40 ppb
2014-04-023761-800-07523.90 ppb
2014-04-023761-801-07034.20 ppb
2014-04-023761-802-09143.50 ppb
2014-04-023761-803-09333.90 ppb
2014-04-023761-804-09494.20 ppb
2014-04-023761-805-10433.70 ppb
2014-04-023761-806-10264.20 ppb
2014-04-023761-807-11033.60 ppb
2014-07-023761-800-08577.40 ppb
2014-07-023761-801-07267.30 ppb
2014-07-023761-802-09177.90 ppb
2014-07-023761-803-09468.00 ppb
2014-07-023761-804-10306.70 ppb
2014-07-023761-805-11328.10 ppb
2014-07-023761-806-11187.50 ppb
2014-07-023761-807-11488.20 ppb
2014-10-013761-800-08054.20 ppb
2014-10-013761-801-07272.80 ppb
2014-10-013761-802-09203.60 ppb
2014-10-013761-803-09383.30 ppb
2014-10-013761-804-10033.00 ppb
2014-10-013761-805-10273.10 ppb
2014-10-013761-806-10402.90 ppb
2014-10-013761-807-11133.50 ppb
2015-01-143761-800-08001.60 ppb
2015-01-143761-801-07331.20 ppb
2015-01-143761-802-09251.60 ppb
2015-01-143761-803-09471.50 ppb
2015-01-143761-804-10171.30 ppb
2015-01-143761-805-11191.50 ppb
2015-01-143761-806-11001.30 ppb
2015-01-143761-807-11301.60 ppb
2015-04-013761-800-07452.90 ppb
2015-04-013761-801-07173.30 ppb
2015-04-013761-802-09153.20 ppb
2015-04-013761-803-09353.00 ppb
2015-04-013761-804-09533.10 ppb
2015-04-013761-805-10253.20 ppb
2015-04-013761-806-10373.00 ppb
2015-04-013761-807-11033.30 ppb
2015-07-153761-800-07584.00 ppb
2015-07-153761-801-07154.00 ppb
2015-07-153761-802-09104.60 ppb
2015-07-153761-803-09304.70 ppb
2015-07-153761-804-10004.30 ppb
2015-07-153761-805-10204.20 ppb
2015-07-153761-806-10373.90 ppb
2015-07-153761-807-11104.60 ppb
2015-10-073761-800-08301.30 ppb
2015-10-073761-801-07521.30 ppb
2015-10-073761-802-09221.80 ppb
2015-10-073761-803-09372.00 ppb
2015-10-073761-804-10101.70 ppb
2015-10-073761-805-10171.60 ppb
2015-10-073761-806-10401.40 ppb
2015-10-073761-807-11051.50 ppb
2016-01-133761-800-0745ND
2016-01-133761-801-07121.000 ppb
2016-01-133761-802-08561.000 ppb
2016-01-133761-803-09281.000 ppb
2016-01-133761-804-09491.000 ppb
2016-01-133761-805-10021.000 ppb
2016-01-133761-806-1017ND
2016-01-133761-807-10501.000 ppb
2016-04-133761-800-0838ND
2016-04-133761-801-0749ND
2016-04-133761-802-10271.000 ppb
2016-04-133761-803-10531.000 ppb
2016-04-133761-804-1131ND
2016-04-133761-805-1147ND
2016-04-133761-806-1210ND
2016-04-133761-807-1235ND
2016-07-063761-800-08001.80 ppb
2016-07-063761-801-07301.40 ppb
2016-07-063761-802-09232.00 ppb
2016-07-063761-803-09432.00 ppb
2016-07-063761-804-10101.80 ppb
2016-07-063761-805-10261.50 ppb
2016-07-063761-806-10411.50 ppb
2016-07-063761-807-11071.90 ppb
2016-10-053761-800-0806ND
2016-10-053761-801-0725ND
2016-10-053761-802-09451.000 ppb
2016-10-053761-803-09571.000 ppb
2016-10-053761-804-1012ND
2016-10-053761-805-1050ND
2016-10-053761-806-1034ND
2016-10-053761-807-11001.000 ppb
2017-01-043761-800-07251.60 ppb
2017-01-043761-801-08051.60 ppb
2017-01-043761-802-09151.50 ppb
2017-01-043761-803-09301.50 ppb
2017-01-043761-804-09551.50 ppb
2017-01-043761-805-10101.30 ppb
2017-01-043761-806-10201.30 ppb
2017-01-043761-807-10451.40 ppb
2017-04-053761-800-07404.70 ppb
2017-04-053761-801-08151.80 ppb
2017-04-053761-802-09408.70 ppb
2017-04-053761-803-09558.10 ppb
2017-04-053761-804-10358.00 ppb
2017-04-053761-805-10455.90 ppb
2017-04-053761-806-11005.50 ppb
2017-04-053761-807-11107.60 ppb
2017-07-123761-800-0804ND
2017-07-123761-801-0741ND
2017-07-123761-802-0926ND
2017-07-123761-803-0959ND
2017-07-123761-804-1016ND
2017-07-123761-805-1030ND
2017-07-123761-806-1115ND
2017-07-123761-807-1133ND
2017-10-043761-800-0757ND
2017-10-043761-801-0810ND
2017-10-043761-802-0950ND
2017-10-043761-803-1015ND
2017-10-043761-804-1054ND
2017-10-043761-805-1110ND
2017-10-043761-806-1140ND
2017-10-043761-807-1212ND
2018-01-033761-800-07061.000 ppb
2018-01-033761-801-0736ND
2018-01-033761-802-0835ND
2018-01-033761-803-0845ND
2018-01-033761-804-0856ND
2018-01-033761-805-0910ND
2018-01-033761-806-0937ND
2018-01-033761-807-0950ND
2018-07-183761-800-0715ND
2018-07-183761-801-0737ND
2018-07-183761-802-0843ND
2018-07-183761-803-0900ND
2018-07-183761-804-0922ND
2018-07-183761-805-0932ND
2018-07-183761-806-1012ND
2018-07-183761-807-1026ND
2018-10-033761-800-0821ND
2018-10-033761-801-0802ND
2018-10-033761-802-0908ND
2018-10-033761-803-0921ND
2018-10-033761-804-0938ND
2018-10-033761-805-0948ND
2018-10-033761-806-1007ND
2018-10-033761-807-1028ND
2018-12-044790-800-0845ND
2018-12-044790-801-11581.60 ppb
2018-12-044790-802-10451.40 ppb
2018-12-044790-803-10501.30 ppb
2018-12-044790-804-10541.30 ppb
2018-12-044790-805-11031.40 ppb
2018-12-044790-806-11141.30 ppb
2018-12-044790-807-11361.30 ppb
2019-01-093761-800-10151.40 ppb
2019-01-093761-801-06251.40 ppb
2019-01-093761-802-10351.50 ppb
2019-01-093761-803-10461.50 ppb
2019-01-093761-804-10561.40 ppb
2019-01-093761-805-11091.50 ppb
2019-01-093761-806-11171.40 ppb
2019-01-093761-807-11241.50 ppb
2019-04-033761-800-0824ND
2019-04-033761-801-0847ND
2019-04-033761-802-0936ND
2019-04-033761-803-0945ND
2019-04-033761-804-0959ND
2019-04-033761-805-1007ND
2019-04-033761-806-1019ND
2019-04-033761-807-1038ND
2019-07-033761-800-0809ND
2019-07-033761-801-0737ND
2019-07-033761-802-0910ND
2019-07-033761-803-0925ND
2019-07-033761-804-0950ND
2019-07-033761-805-1000ND
2019-07-033761-806-1014ND
2019-07-033761-807-1034ND
2019-10-023761-800-0747ND
2019-10-023761-801-0724ND
2019-10-023761-802-0830ND
2019-10-023761-803-0842ND
2019-10-023761-804-0858ND
2019-10-023761-805-0910ND
2019-10-023761-806-0920ND
2019-10-023761-807-0938ND