Know Your Environment. Protect Your Health.

Monochloroacetic acid

Tukwila Water Department

Monochloroacetic 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)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.926 ppb167ND - 2.73 ppb
20190.856 ppb168ND - 2.42 ppb
2020N/A00N/A
20211.05 ppb169ND - 2.22 ppb
20220.660 ppb165ND - 3.13 ppb
20230.322 ppb163ND - 1.94 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 53 ppb

The EWG Health Guideline of 53 ppb for monochloroacetic 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.a public health goal. This health guideline protects against change to fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-03-15ND
2018-03-15ND
2018-03-151.80 ppb
2018-03-15ND
2018-06-142.73 ppb
2018-06-142.11 ppb
2018-06-142.50 ppb
2018-06-141.70 ppb
2018-09-13ND
2018-09-13ND
2018-09-13ND
2018-09-132.38 ppb
2018-12-12ND
2018-12-12ND
2018-12-12ND
2018-12-121.59 ppb
2019-03-18ND
2019-03-18ND
2019-03-18ND
2019-03-18ND
2019-06-121.71 ppb
2019-06-121.57 ppb
2019-06-12ND
2019-06-121.58 ppb
2019-09-101.52 ppb
2019-09-10ND
2019-09-102.42 ppb
2019-09-101.80 ppb
2019-12-11ND
2019-12-111.60 ppb
2019-12-111.50 ppb
2019-12-11ND
2021-03-1040889402.03 ppb
2021-03-1040889412.16 ppb
2021-03-1040889422.04 ppb
2021-03-1040889432.22 ppb
2021-06-104130744ND
2021-06-1041307421.67 ppb
2021-06-104130743ND
2021-06-1041307451.50 ppb
2021-09-024172329ND
2021-09-0241723321.88 ppb
2021-09-024172331ND
2021-09-024172330ND
2021-12-0842159161.51 ppb
2021-12-084215917ND
2021-12-0842159191.72 ppb
2021-12-084215918ND
2022-03-0942581481.64 ppb
2022-03-0942581461.88 ppb
2022-03-094258149ND
2022-03-094258147ND
2022-06-0642949922.35 ppb
2022-06-0642949951.56 ppb
2022-06-064294994ND
2022-06-0642949933.13 ppb
2022-09-084343523ND
2022-09-084343521ND
2022-09-084343520ND
2022-09-084343522ND
2022-12-144385524ND
2022-12-144385526ND
2022-12-144385527ND
2022-12-144385525ND
2023-03-074426468ND
2023-03-074426471ND
2023-03-074426469ND
2023-03-074426470ND
2023-06-084468607ND
2023-06-084468608ND
2023-06-084468609ND
2023-06-084468610ND
2023-09-054514463ND
2023-09-054514465ND
2023-09-0545144661.50 ppb
2023-09-054514464ND
2023-12-044556966ND
2023-12-044556968ND
2023-12-0445569671.71 ppb
2023-12-0445569651.94 ppb