Know Your Environment. Protect Your Health.

Monochloroacetic acid

City of Mountlake Terrace

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
20180.150 ppb161ND - 2.40 ppb
20191.23 ppb167ND - 4.50 ppb
2020N/A00N/A
20210.756 ppb165ND - 3.50 ppb
20220.794 ppb165ND - 3.10 ppb
20230.644 ppb164ND - 3.30 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
2018-03-13ND
2018-03-13ND
2018-03-13ND
2018-03-13ND
2018-06-12ND
2018-06-12ND
2018-06-12ND
2018-06-12ND
2018-09-11ND
2018-09-11ND
2018-09-11ND
2018-09-112.40 ppb
2018-12-12ND
2018-12-12ND
2018-12-12ND
2018-12-12ND
2019-03-11ND
2019-03-11ND
2019-03-11ND
2019-03-11ND
2019-06-112.50 ppb
2019-06-112.50 ppb
2019-06-113.00 ppb
2019-06-112.60 ppb
2019-09-104.50 ppb
2019-09-10ND
2019-09-10ND
2019-09-102.40 ppb
2019-12-10ND
2019-12-102.10 ppb
2019-12-10ND
2019-12-10ND
2021-03-174090728ND
2021-03-1740903262.10 ppb
2021-03-1740903282.40 ppb
2021-03-174090722ND
2021-06-1541646172.10 ppb
2021-06-1541646192.00 ppb
2021-06-154164615ND
2021-06-154164621ND
2021-09-0841742013.50 ppb
2021-09-084174203ND
2021-09-084174205ND
2021-09-084174199ND
2021-12-074220409ND
2021-12-074220415ND
2021-12-074220413ND
2021-12-074220411ND
2022-03-0842567372.70 ppb
2022-03-0842567132.10 ppb
2022-03-084256715ND
2022-03-0842567172.10 ppb
2022-06-144302591ND
2022-06-1443025662.70 ppb
2022-06-144302595ND
2022-06-144302593ND
2022-09-264357010ND
2022-09-264357006ND
2022-09-264357008ND
2022-09-2643683763.10 ppb
2022-12-144397567ND
2022-12-144397574ND
2022-12-144397569ND
2022-12-144397572ND
2023-03-074426992ND
2023-03-074426994ND
2023-03-074426996ND
2023-03-074426990ND
2023-06-144476490ND
2023-06-144476488ND
2023-06-1444764952.60 ppb
2023-06-1444764922.40 ppb
2023-09-054518052ND
2023-09-054522633ND
2023-09-0545180543.30 ppb
2023-09-054522635ND
2023-12-064559921ND
2023-12-0645599252.00 ppb
2023-12-064559923ND
2023-12-064559919ND