Know Your Environment. Protect Your Health.

Monochloroacetic acid

King County Water District No 90

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
2018ND160ND
20190.610 ppb165ND - 2.18 ppb
2020N/A00N/A
20211.00 ppb168ND - 2.55 ppb
20221.08 ppb168ND - 3.47 ppb
2023ND160ND

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
2018-03-08ND
2018-03-08ND
2018-03-08ND
2018-03-08ND
2018-06-05ND
2018-06-05ND
2018-06-05ND
2018-06-05ND
2018-09-06ND
2018-09-06ND
2018-09-06ND
2018-09-06ND
2018-12-05ND
2018-12-05ND
2018-12-05ND
2018-12-05ND
2019-03-07ND
2019-03-071.86 ppb
2019-03-07ND
2019-03-07ND
2019-06-05ND
2019-06-05ND
2019-06-05ND
2019-06-05ND
2019-09-051.74 ppb
2019-09-052.18 ppb
2019-09-05ND
2019-09-051.99 ppb
2019-12-05ND
2019-12-05ND
2019-12-05ND
2019-12-051.99 ppb
2021-03-034088919ND
2021-03-034088916ND
2021-03-034088917ND
2021-03-034088918ND
2021-06-0241307252.00 ppb
2021-06-0241307232.22 ppb
2021-06-0241307222.29 ppb
2021-06-0241307242.55 ppb
2021-09-0241723271.82 ppb
2021-09-0241723251.60 ppb
2021-09-024172326ND
2021-09-0241723281.50 ppb
2021-12-024215904ND
2021-12-024215906ND
2021-12-0242159072.04 ppb
2021-12-024215905ND
2022-03-024258129ND
2022-03-024258127ND
2022-03-024258128ND
2022-03-024258126ND
2022-06-0242949901.76 ppb
2022-06-0242949882.83 ppb
2022-06-0242949891.52 ppb
2022-06-0242949913.47 ppb
2022-09-0643435091.71 ppb
2022-09-0643435082.03 ppb
2022-09-0643435111.87 ppb
2022-09-0643435102.09 ppb
2022-12-074385497ND
2022-12-074385498ND
2022-12-074385499ND
2022-12-074385496ND
2023-03-024426462ND
2023-03-024426460ND
2023-03-024426461ND
2023-03-024426463ND
2023-06-014468598ND
2023-06-014468596ND
2023-06-014468597ND
2023-06-014468595ND
2023-09-044514470ND
2023-09-044514469ND
2023-09-044514467ND
2023-09-044514468ND
2023-12-054556970ND
2023-12-054556969ND
2023-12-054556971ND
2023-12-054556972ND