Know Your Environment. Protect Your Health.

Trichloroacetic acid

City of Port Angeles

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.

 

80

Samples

0

Samples exceeding legal limit (MCL)

38

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.794 ppb167ND - 2.90 ppb
20190.713 ppb167ND - 2.00 ppb
2020N/A00N/A
20210.950 ppb168ND - 3.70 ppb
20221.50 ppb1612ND - 6.60 ppb
20230.306 ppb164ND - 1.50 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
2018-01-311.80 ppb
2018-01-312.90 ppb
2018-01-311.30 ppb
2018-01-311.80 ppb
2018-04-112.80 ppb
2018-04-111.000 ppb
2018-04-11ND
2018-04-11ND
2018-07-13ND
2018-07-13ND
2018-07-131.10 ppb
2018-07-13ND
2018-10-24ND
2018-10-24ND
2018-10-24ND
2018-11-08ND
2019-01-17ND
2019-01-171.70 ppb
2019-01-171.70 ppb
2019-01-171.70 ppb
2019-04-10ND
2019-04-102.00 ppb
2019-04-10ND
2019-04-10ND
2019-07-161.10 ppb
2019-07-16ND
2019-07-16ND
2019-07-161.80 ppb
2019-10-231.40 ppb
2019-10-23ND
2019-10-23ND
2019-10-23ND
2021-03-0940906383.70 ppb
2021-03-0940906371.60 ppb
2021-03-094090634ND
2021-03-0940906401.30 ppb
2021-06-084168798ND
2021-06-084168800ND
2021-06-0841688021.80 ppb
2021-06-0841688041.30 ppb
2021-09-144178754ND
2021-09-144178732ND
2021-09-1441787461.000 ppb
2021-09-144178738ND
2021-12-1342214552.50 ppb
2021-12-134221453ND
2021-12-1342214512.00 ppb
2021-12-134221449ND
2022-02-0842461566.60 ppb
2022-02-0842461521.10 ppb
2022-02-0842461581.20 ppb
2022-02-0842461541.80 ppb
2022-04-1242729262.70 ppb
2022-04-124272922ND
2022-04-1242729201.60 ppb
2022-04-1242729181.10 ppb
2022-07-124316187ND
2022-07-1243161931.50 ppb
2022-07-124316189ND
2022-07-124316191ND
2022-10-1843684241.10 ppb
2022-10-1843684221.10 ppb
2022-10-2043684201.30 ppb
2022-10-2643703712.90 ppb
2023-01-244407731ND
2023-01-2444077331.30 ppb
2023-01-2444077371.50 ppb
2023-01-244407735ND
2023-05-094457484ND
2023-05-0944574821.000 ppb
2023-05-094457488ND
2023-05-094457486ND
2023-08-024497020ND
2023-08-024497026ND
2023-08-024497022ND
2023-08-024497024ND
2023-11-074555599ND
2023-11-074555601ND
2023-11-0745556051.10 ppb
2023-11-074555603ND