Know Your Environment. Protect Your Health.

Trichloroacetic acid

El Oso Water Supply Corporation

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.

 

46

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.138 ppb81ND - 1.10 ppb
20190.188 ppb81ND - 1.50 ppb
20200.150 ppb81ND - 1.20 ppb
2021ND80ND
2022ND70ND
20230.729 ppb74ND - 1.70 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for trichloroacetic acid was defined by the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to reproduction and child development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-01-24AE10141ND
2018-01-24AE101401.10 ppb
2018-04-17AE22993ND
2018-04-17AE22989ND
2018-07-27AE34843ND
2018-07-27AE34846ND
2018-10-22AE44086ND
2018-10-22AE44087ND
2019-02-19AE54837ND
2019-02-19AE54838ND
2019-04-01AE60646ND
2019-04-01AE60648ND
2019-07-11AE74097ND
2019-07-11AE741041.50 ppb
2019-11-15AE89531ND
2019-11-15AE89534ND
2020-03-19AF03779ND
2020-03-19AF03780ND
2020-06-09AF14626ND
2020-06-09AF14627ND
2020-09-11AF27342ND
2020-09-11AF27343ND
2020-11-13AF34586ND
2020-11-13AF345841.20 ppb
2021-01-26AF41045ND
2021-01-26AF41048ND
2021-06-15AF58059ND
2021-06-15AF58060ND
2021-09-08AF69099ND
2021-09-08AF69102ND
2021-12-10AF78628ND
2021-12-10AF78629ND
2022-03-10AF88638ND
2022-03-10AF88639ND
2022-06-24AG02348ND
2022-06-24AG02352ND
2022-09-08AG12064ND
2022-09-08AG12065ND
2022-12-30AG23216ND
2023-02-16AG293171.10 ppb
2023-02-16AG29318ND
2023-06-01AG427741.10 ppb
2023-06-01AG42776ND
2023-09-27AG577511.70 ppb
2023-09-27AG577521.20 ppb
2023-12-22AG67344ND