Know Your Environment. Protect Your Health.

Monochloroacetic acid

King County Water District #20

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
20180.194 ppb162ND - 1.58 ppb
20190.354 ppb163ND - 2.33 ppb
2020N/A00N/A
20211.25 ppb167ND - 6.60 ppb
20220.798 ppb166ND - 2.74 ppb
20230.108 ppb161ND - 1.72 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
2018-03-05ND
2018-03-05ND
2018-03-05ND
2018-03-05ND
2018-06-04ND
2018-06-04ND
2018-06-04ND
2018-06-04ND
2018-09-051.58 ppb
2018-09-05ND
2018-09-05ND
2018-09-051.52 ppb
2018-12-03ND
2018-12-03ND
2018-12-03ND
2018-12-03ND
2019-03-11ND
2019-03-11ND
2019-03-11ND
2019-03-11ND
2019-06-041.79 ppb
2019-06-04ND
2019-06-04ND
2019-06-04ND
2019-09-03ND
2019-09-032.33 ppb
2019-09-03ND
2019-09-03ND
2019-12-111.55 ppb
2019-12-11ND
2019-12-11ND
2019-12-11ND
2021-03-0440889293.45 ppb
2021-03-0440889302.30 ppb
2021-03-0440889311.63 ppb
2021-03-0440889286.60 ppb
2021-06-084130726ND
2021-06-084130728ND
2021-06-084130727ND
2021-06-084130729ND
2021-09-094172354ND
2021-09-094172356ND
2021-09-0941723532.06 ppb
2021-09-0941723552.18 ppb
2021-12-084215936ND
2021-12-0842159381.80 ppb
2021-12-084215937ND
2021-12-084215939ND
2022-03-044258132ND
2022-03-044258131ND
2022-03-044258133ND
2022-03-044258130ND
2022-06-0742950182.58 ppb
2022-06-074295019ND
2022-06-0742950172.00 ppb
2022-06-0742950161.52 ppb
2022-09-0643435132.11 ppb
2022-09-0643435121.81 ppb
2022-09-0643435142.74 ppb
2022-09-064343515ND
2022-12-074385511ND
2022-12-074385508ND
2022-12-074385509ND
2022-12-074385510ND
2023-03-064426472ND
2023-03-074426475ND
2023-03-074426473ND
2023-03-074426474ND
2023-06-054468602ND
2023-06-054468601ND
2023-06-054468599ND
2023-06-054468600ND
2023-09-054514472ND
2023-09-054514471ND
2023-09-054514473ND
2023-09-054514474ND
2023-12-054556976ND
2023-12-0545569741.72 ppb
2023-12-054556973ND
2023-12-054556975ND