Know Your Environment. Protect Your Health.

Monochloroacetic acid

King County Water District #125

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
20180.483 ppb164ND - 2.44 ppb
20191.02 ppb168ND - 2.51 ppb
2020N/A00N/A
20211.35 ppb1611ND - 2.49 ppb
20220.904 ppb167ND - 2.75 ppb
20230.976 ppb169ND - 2.17 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
2018-03-14ND
2018-03-141.69 ppb
2018-03-14ND
2018-03-14ND
2018-06-11ND
2018-06-112.44 ppb
2018-06-11ND
2018-06-11ND
2018-09-101.65 ppb
2018-09-101.95 ppb
2018-09-10ND
2018-09-10ND
2018-12-11ND
2018-12-11ND
2018-12-11ND
2018-12-11ND
2019-03-11ND
2019-03-11ND
2019-03-11ND
2019-03-11ND
2019-06-112.51 ppb
2019-06-111.54 ppb
2019-06-111.89 ppb
2019-06-111.71 ppb
2019-09-102.21 ppb
2019-09-102.27 ppb
2019-09-102.22 ppb
2019-09-10ND
2019-12-09ND
2019-12-091.92 ppb
2019-12-09ND
2019-12-09ND
2021-03-0940889501.91 ppb
2021-03-0940889481.87 ppb
2021-03-0940889511.96 ppb
2021-03-0940889491.99 ppb
2021-06-154130754ND
2021-06-154130755ND
2021-06-154130757ND
2021-06-1541307561.57 ppb
2021-09-1441723602.07 ppb
2021-09-1441723572.49 ppb
2021-09-1441723582.08 ppb
2021-09-1441723592.04 ppb
2021-12-144215943ND
2021-12-144215940ND
2021-12-1442159411.91 ppb
2021-12-1442159421.66 ppb
2022-03-084258163ND
2022-03-084258164ND
2022-03-084258165ND
2022-03-084258162ND
2022-06-1442950202.70 ppb
2022-06-1442950222.75 ppb
2022-06-1442950231.81 ppb
2022-06-1442950212.35 ppb
2022-09-1543435491.54 ppb
2022-09-154343551ND
2022-09-1543435501.56 ppb
2022-09-1543435481.75 ppb
2022-12-154385541ND
2022-12-154385538ND
2022-12-154385540ND
2022-12-154385539ND
2023-03-164426509ND
2023-03-164426508ND
2023-03-164426507ND
2023-03-164426506ND
2023-06-1544686391.96 ppb
2023-06-1544686371.85 ppb
2023-06-1544686382.17 ppb
2023-06-1544686401.58 ppb
2023-09-1445145021.64 ppb
2023-09-144514503ND
2023-09-1445145001.68 ppb
2023-09-144514501ND
2023-12-1245569951.55 ppb
2023-12-1245569931.66 ppb
2023-12-1245569941.53 ppb
2023-12-124556996ND