Know Your Environment. Protect Your Health.

Trichloroacetic acid

City of Gonzales Water System

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.

 

128

Samples

0

Samples exceeding legal limit (MCL)

44

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.767 ppb3216ND - 9.20 ppb
20190.536 ppb3210ND - 5.30 ppb
20200.283 ppb1610ND - 0.510 ppb
20210.0613 ppb162ND - 0.490 ppb
20220.105 ppb165ND - 0.370 ppb
20230.0188 ppb161ND - 0.300 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
2018-02-0235371907001ND
2018-02-0235371907002ND
2018-02-0235371907003ND
2018-02-0235371907004ND
2018-02-0235371907001ND
2018-02-0235371907002ND
2018-02-0235371907003ND
2018-02-0235371907004ND
2018-05-18353932310010.430 ppb
2018-05-18353932310020.430 ppb
2018-05-18353932310030.440 ppb
2018-05-18353932310049.20 ppb
2018-05-18353932310010.430 ppb
2018-05-18353932310020.430 ppb
2018-05-18353932310030.440 ppb
2018-05-18353932310049.20 ppb
2018-08-0335408663001ND
2018-08-0335408663002ND
2018-08-0335408663003ND
2018-08-0335408663004ND
2018-08-0335408663001ND
2018-08-0335408663002ND
2018-08-0335408663003ND
2018-08-0335408663004ND
2018-11-01354282040010.460 ppb
2018-11-01354282040020.490 ppb
2018-11-01354282040030.450 ppb
2018-11-01354282040040.370 ppb
2018-11-01354282040010.460 ppb
2018-11-01354282040020.490 ppb
2018-11-01354282040030.450 ppb
2018-11-01354282040040.370 ppb
2019-02-0735447124001ND
2019-02-0735447124002ND
2019-02-07354471240030.620 ppb
2019-02-0735447124004ND
2019-02-0735447124001ND
2019-02-0735447124002ND
2019-02-07354471240030.620 ppb
2019-02-0735447124004ND
2019-05-0835468287001ND
2019-05-0835468287002ND
2019-05-08354682870035.30 ppb
2019-05-0835468287004ND
2019-05-0835468287001ND
2019-05-0835468287002ND
2019-05-08354682870035.30 ppb
2019-05-0835468287004ND
2019-08-06354887330010.860 ppb
2019-08-06354887330020.920 ppb
2019-08-06354887330030.870 ppb
2019-08-0635488733004ND
2019-08-06354887330010.860 ppb
2019-08-06354887330020.920 ppb
2019-08-06354887330030.870 ppb
2019-08-0635488733004ND
2019-11-0635511100001ND
2019-11-0635511100002ND
2019-11-0635511100003ND
2019-11-0635511100004ND
2019-11-0635511100001ND
2019-11-0635511100002ND
2019-11-0635511100003ND
2019-11-0635511100004ND
2020-02-04355293520010.510 ppb
2020-02-04355293520020.510 ppb
2020-02-04355293520030.490 ppb
2020-02-04355293520040.500 ppb
2020-05-1235550484001ND
2020-05-12355504840020.270 ppb
2020-05-12355504840030.400 ppb
2020-05-1235550484004ND
2020-08-0435569238001ND
2020-08-0435569238002ND
2020-08-0435569238003ND
2020-08-0435569238004ND
2020-11-04355905220010.460 ppb
2020-11-04355905220020.460 ppb
2020-11-04355905220030.440 ppb
2020-11-04355905220040.480 ppb
2021-02-0135610064001ND
2021-02-0135610064002ND
2021-02-0135610064003ND
2021-02-0135610064004ND
2021-05-0335631688001ND
2021-05-0335631688002ND
2021-05-0335631688003ND
2021-05-0335631688004ND
2021-08-0535653948001ND
2021-08-0535653948002ND
2021-08-0535653948003ND
2021-08-0535653948004ND
2021-11-0335676417001ND
2021-11-0335676417002ND
2021-11-03356764170030.490 ppb
2021-11-03356764170040.490 ppb
2022-02-17356983730010.340 ppb
2022-02-17356983730020.350 ppb
2022-02-17356983730030.320 ppb
2022-02-17356983730040.300 ppb
2022-05-09357174130010.370 ppb
2022-05-0935717413002ND
2022-05-0935717413003ND
2022-05-0935717413004ND
2022-08-1035739070001ND
2022-08-1035739070002ND
2022-08-1035739070003ND
2022-08-1035739070004ND
2022-11-0335757716001ND
2022-11-0335757716002ND
2022-11-0335757716003ND
2022-11-0335757716004ND
2023-02-0235776737001ND
2023-02-0235776737002ND
2023-02-0235776737003ND
2023-02-0235776737004ND
2023-05-0435797439001ND
2023-05-0435797439002ND
2023-05-0435797439003ND
2023-05-0435797439004ND
2023-08-0235817723001ND
2023-08-02358177230020.300 ppb
2023-08-0235817723003ND
2023-08-0235817723004ND
2023-11-0735840526001ND
2023-11-0735840526002ND
2023-11-0735840526003ND
2023-11-0735840526004ND