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EWG's Tap Water Database — 2019 UPDATE

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Trichloroacetic acid

California Water Service Company - Hermosa / Redondo Beach

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.

 

184

Samples

0

Samples exceeding legal limit (MCL)

159

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20122.33 ppb2417ND - 4.60 ppb
20133.75 ppb3227ND - 6.60 ppb
20143.10 ppb3229ND - 5.00 ppb
20153.07 ppb3229ND - 6.00 ppb
20162.29 ppb3230ND - 3.80 ppb
20173.18 ppb3227ND - 9.60 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
2012-06-055810-800-13084.00 ppb
2012-06-055810-801-09584.60 ppb
2012-06-055810-802-09474.60 ppb
2012-06-055810-803-1501ND
2012-06-055810-804-09194.10 ppb
2012-06-055810-805-15401.60 ppb
2012-06-055810-806-11174.50 ppb
2012-06-055810-807-1509ND
2012-09-045810-800-11404.30 ppb
2012-09-045810-801-09404.60 ppb
2012-09-045810-802-09324.30 ppb
2012-09-045810-803-1434ND
2012-09-045810-804-09033.50 ppb
2012-09-045810-805-15221.60 ppb
2012-09-045810-806-10374.00 ppb
2012-09-045810-807-1455ND
2012-12-045810-800-11071.40 ppb
2012-12-045810-801-10001.90 ppb
2012-12-045810-802-09482.40 ppb
2012-12-045810-803-1410ND
2012-12-045810-804-09322.50 ppb
2012-12-045810-805-1325ND
2012-12-045810-806-10372.10 ppb
2012-12-045810-807-1426ND
2013-03-065810-800-09204.00 ppb
2013-03-065810-801-09434.70 ppb
2013-03-065810-802-09354.70 ppb
2013-03-065810-803-0900ND
2013-03-065810-804-08405.60 ppb
2013-03-065810-805-09132.50 ppb
2013-03-065810-806-08554.50 ppb
2013-03-065810-807-09322.90 ppb
2013-06-045810-800-11006.60 ppb
2013-06-045810-801-10216.40 ppb
2013-06-045810-802-10125.90 ppb
2013-06-045810-803-12593.80 ppb
2013-06-045810-804-09565.80 ppb
2013-06-045810-805-14015.80 ppb
2013-06-045810-806-10425.80 ppb
2013-06-045810-807-13172.70 ppb
2013-09-035810-800-12326.20 ppb
2013-09-035810-801-09366.50 ppb
2013-09-035810-802-09226.50 ppb
2013-09-035810-803-1450ND
2013-09-035810-804-08516.10 ppb
2013-09-035810-805-15395.90 ppb
2013-09-035810-806-10456.00 ppb
2013-09-035810-807-1508ND
2013-12-105810-800-12151.70 ppb
2013-12-105810-801-09371.80 ppb
2013-12-105810-802-09271.70 ppb
2013-12-105810-803-1442ND
2013-12-105810-804-09032.00 ppb
2013-12-105810-805-15221.60 ppb
2013-12-105810-806-10512.20 ppb
2013-12-105810-807-1449ND
2014-03-045810-800-11553.30 ppb
2014-03-045810-801-09213.30 ppb
2014-03-045810-802-09103.50 ppb
2014-03-045810-803-14192.40 ppb
2014-03-045810-804-08482.80 ppb
2014-03-045810-805-15043.40 ppb
2014-03-045810-806-10353.20 ppb
2014-03-045810-807-14283.70 ppb
2014-06-035810-800-12424.50 ppb
2014-06-035810-801-09475.00 ppb
2014-06-035810-802-09355.00 ppb
2014-06-035810-803-14371.50 ppb
2014-06-035810-804-09124.70 ppb
2014-06-035810-805-15254.70 ppb
2014-06-035810-806-10524.70 ppb
2014-06-035810-807-1448ND
2014-09-025810-800-13004.20 ppb
2014-09-025810-801-10254.40 ppb
2014-09-025810-802-10104.30 ppb
2014-09-025810-803-1500ND
2014-09-025810-804-09404.20 ppb
2014-09-025810-805-15254.30 ppb
2014-09-025810-806-11304.20 ppb
2014-09-025810-807-1445ND
2014-12-025810-800-13352.30 ppb
2014-12-025810-801-10502.30 ppb
2014-12-025810-802-10372.50 ppb
2014-12-025810-803-13181.70 ppb
2014-12-025810-804-10122.40 ppb
2014-12-025810-805-14212.20 ppb
2014-12-025810-806-10152.40 ppb
2014-12-025810-807-13362.20 ppb
2015-03-035810-800-11502.60 ppb
2015-03-035810-801-09462.60 ppb
2015-03-035810-802-09342.20 ppb
2015-03-035810-803-14312.10 ppb
2015-03-035810-804-09572.30 ppb
2015-03-035810-805-15212.60 ppb
2015-03-035810-806-10562.30 ppb
2015-03-035810-807-14462.30 ppb
2015-06-025810-800-12423.60 ppb
2015-06-025810-801-10513.80 ppb
2015-06-025810-802-10343.70 ppb
2015-06-025810-803-14433.40 ppb
2015-06-025810-804-09323.90 ppb
2015-06-025810-805-15203.70 ppb
2015-06-025810-806-11313.70 ppb
2015-06-025810-807-1533ND
2015-09-085810-800-11445.90 ppb
2015-09-085810-801-10005.60 ppb
2015-09-085810-802-09435.60 ppb
2015-09-085810-803-14053.50 ppb
2015-09-085810-804-09155.80 ppb
2015-09-085810-805-14485.80 ppb
2015-09-085810-806-10536.00 ppb
2015-09-085810-807-1419ND
2015-12-085810-800-13002.50 ppb
2015-12-085810-801-10242.40 ppb
2015-12-085810-802-10152.40 ppb
2015-12-085810-803-14571.80 ppb
2015-12-085810-804-09522.10 ppb
2015-12-085810-805-15362.00 ppb
2015-12-085810-806-11282.00 ppb
2015-12-085810-807-1506ND
2016-03-085810-800-13001.50 ppb
2016-03-085810-801-10101.20 ppb
2016-03-085810-802-09551.40 ppb
2016-03-085810-803-14541.10 ppb
2016-03-085810-804-09321.10 ppb
2016-03-085810-805-1540ND
2016-03-085810-806-11131.10 ppb
2016-03-085810-807-15071.30 ppb
2016-06-075810-800-12273.10 ppb
2016-06-075810-801-10273.60 ppb
2016-06-075810-802-10193.40 ppb
2016-06-075810-803-14332.20 ppb
2016-06-075810-804-09553.80 ppb
2016-06-075810-805-15093.20 ppb
2016-06-075810-806-15273.70 ppb
2016-06-075810-807-14412.80 ppb
2016-09-065810-800-09433.30 ppb
2016-09-065810-801-09213.30 ppb
2016-09-065810-802-09143.40 ppb
2016-09-065810-803-10451.90 ppb
2016-09-065810-804-09023.30 ppb
2016-09-065810-805-10223.60 ppb
2016-09-065810-806-10073.30 ppb
2016-09-065810-807-11012.70 ppb
2016-12-065810-800-11472.10 ppb
2016-12-065810-801-09482.30 ppb
2016-12-065810-802-09362.20 ppb
2016-12-065810-803-1439ND
2016-12-065810-804-09002.50 ppb
2016-12-065810-805-15191.60 ppb
2016-12-065810-806-10562.30 ppb
2016-12-065810-807-14541.10 ppb
2017-03-075810-800-13464.30 ppb
2017-03-075810-801-10496.20 ppb
2017-03-075810-802-10256.40 ppb
2017-03-075810-803-15291.50 ppb
2017-03-075810-804-10047.00 ppb
2017-03-075810-805-15523.70 ppb
2017-03-075810-806-11475.90 ppb
2017-03-075810-807-16002.00 ppb
2017-06-065810-800-11473.40 ppb
2017-06-065810-801-10103.70 ppb
2017-06-065810-802-10003.90 ppb
2017-06-065810-803-1448ND
2017-06-065810-804-09342.90 ppb
2017-06-065810-805-15151.90 ppb
2017-06-065810-806-11093.80 ppb
2017-06-065810-807-1440ND
2017-09-055810-800-12583.30 ppb
2017-09-055810-801-09564.20 ppb
2017-09-055810-802-09432.50 ppb
2017-09-055810-803-14472.00 ppb
2017-09-055810-804-09145.70 ppb
2017-09-055810-805-15262.20 ppb
2017-09-055810-806-11123.50 ppb
2017-09-055810-807-14531.50 ppb
2017-12-065810-800-10201.20 ppb
2017-12-065810-801-0950ND
2017-12-065810-802-0940ND
2017-12-065810-803-11204.50 ppb
2017-12-065810-804-09201.10 ppb
2017-12-065810-805-11553.90 ppb
2017-12-065810-806-1005ND
2017-12-065810-807-11359.60 ppb