Know Your Environment. Protect Your Health.

Trichloroacetic acid

New London Water Association

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.

 

47

Samples

0

Samples exceeding legal limit (MCL)

20

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.13 ppb87ND - 1.40 ppb
20190.486 ppb73ND - 1.30 ppb
20200.288 ppb82ND - 1.20 ppb
20210.763 ppb85ND - 1.50 ppb
20220.466 ppb83ND - 1.55 ppb
2023ND80ND

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
2018-03-12180730018011.20 ppb
2018-03-12180730019011.20 ppb
2018-06-11181650042011.10 ppb
2018-06-1118165004101ND
2018-09-11182560036011.40 ppb
2018-09-11182560035011.40 ppb
2018-12-03183400040011.30 ppb
2018-12-03183400039011.40 ppb
2019-03-12190730023011.10 ppb
2019-03-12190730024011.000 ppb
2019-06-19191710041011.30 ppb
2019-09-0919255000801ND
2019-09-0919255000701ND
2019-12-0319339000501ND
2019-12-0319339000601ND
2020-03-0220064000401ND
2020-03-0220064000501ND
2020-06-29201830020011.10 ppb
2020-06-29201830019011.20 ppb
2020-09-0720254000801ND
2020-09-0720254000701ND
2020-11-3020338002501ND
2020-11-3020338002401ND
2021-03-1021070010701ND
2021-03-1021070010801ND
2021-06-09211610025011.50 ppb
2021-06-09211610024011.40 ppb
2021-09-08212520027011.000 ppb
2021-09-0821252002601ND
2021-12-07213420034011.10 ppb
2021-12-07213420033011.10 ppb
2022-03-02O195920-HAA-11.07 ppb
2022-03-02O195921-HAA-11.11 ppb
2022-06-07O198857-HAA-11.55 ppb
2022-06-07O198856-HAA-1ND
2022-09-07O201982-HAA-1ND
2022-09-07O201981-HAA-1ND
2022-12-05O204259-HAA-1ND
2022-12-05O204260-HAA-1ND
2023-03-07O206918-HAA-1ND
2023-03-29O207374-HAA-1ND
2023-06-14O209996-HAA-1ND
2023-06-14O209995-HAA-1ND
2023-09-06O211851-HAA-1ND
2023-09-25O212287-HAA-1ND
2023-12-05O214314-HAA-1ND
2023-12-05O214315-HAA-1ND