Know Your Environment. Protect Your Health.

Trichloroacetic acid

San Antonio 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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND30ND
20201.10 ppb32ND - 2.10 ppb
2021ND30ND
20220.650 ppb21ND - 1.30 ppb
20232.20 ppb221.10 ppb - 3.30 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
2018-09-18CA3610085_DST_604-201809181200ND
2018-09-18CA3610085_DST_601-201809181000ND
2019-08-13CA3610085_DST_605-201908131015ND
2019-08-13CA3610085_DST_601-201908130915ND
2019-08-13CA3610085_DST_604-201908130930ND
2020-08-10CA3610085_DST_604-2020081010231.20 ppb
2020-08-10CA3610085_DST_605-202008101123ND
2020-08-10CA3610085_DST_601-2020081009422.10 ppb
2021-10-12CA3610085_DST_601-202110121200ND
2021-10-12CA3610085_DST_604-202110121220ND
2021-10-12CA3610085_DST_605-202110121050ND
2022-09-27CA3610085_DST_601-202209270920ND
2022-09-27CA3610085_DST_604-2022092709351.30 ppb
2023-08-15CA3610085_DST_604-2023081510001.10 ppb
2023-08-15CA3610085_DST_601-2023081504453.30 ppb