Know Your Environment. Protect Your Health.

Monochloroacetic acid

City of Lynnwood

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.

 

128

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.138 ppb161ND - 2.20 ppb
20190.306 ppb162ND - 2.90 ppb
2020N/A00N/A
20211.16 ppb3216ND - 3.10 ppb
20221.32 ppb3218ND - 3.20 ppb
20230.994 ppb3211ND - 3.90 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
2018-02-15ND
2018-02-15ND
2018-02-15ND
2018-02-15ND
2018-05-23ND
2018-05-23ND
2018-05-23ND
2018-05-23ND
2018-08-30ND
2018-08-302.20 ppb
2018-08-30ND
2018-08-30ND
2018-11-27ND
2018-11-27ND
2018-11-27ND
2018-11-27ND
2019-02-25ND
2019-02-25ND
2019-02-25ND
2019-02-25ND
2019-05-22ND
2019-05-22ND
2019-05-22ND
2019-05-22ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-11-13ND
2019-11-132.00 ppb
2019-11-132.90 ppb
2019-11-13ND
2021-02-2440811202.00 ppb
2021-02-2440811222.10 ppb
2021-02-244081116ND
2021-02-244081114ND
2021-02-244081112ND
2021-02-2440811102.10 ppb
2021-02-244081124ND
2021-02-2440811182.40 ppb
2021-05-1241141362.00 ppb
2021-05-1241138932.00 ppb
2021-05-124114140ND
2021-05-124114138ND
2021-05-124113895ND
2021-05-124114134ND
2021-05-124114130ND
2021-05-1241138972.00 ppb
2021-08-254166202ND
2021-08-2541662062.10 ppb
2021-08-2541662082.80 ppb
2021-08-2541662162.50 ppb
2021-08-2541662142.30 ppb
2021-08-2541662122.90 ppb
2021-08-2541662043.10 ppb
2021-08-2541662102.50 ppb
2021-11-234210642ND
2021-11-2342106402.20 ppb
2021-11-234210637ND
2021-11-234210635ND
2021-11-234210631ND
2021-11-2342106332.10 ppb
2021-11-234210644ND
2021-11-234210629ND
2022-02-2842495382.10 ppb
2022-02-2842528522.20 ppb
2022-02-2842528542.50 ppb
2022-02-2842528562.10 ppb
2022-02-2842528582.40 ppb
2022-02-284252846ND
2022-02-2842528502.30 ppb
2022-02-2842528482.30 ppb
2022-05-264302617ND
2022-05-264302623ND
2022-05-2643026152.00 ppb
2022-05-264302627ND
2022-05-264302619ND
2022-05-264302621ND
2022-05-264302611ND
2022-05-264302613ND
2022-08-3143591732.20 ppb
2022-08-3143591552.00 ppb
2022-08-3143591503.20 ppb
2022-08-3143591442.30 ppb
2022-08-3143591593.00 ppb
2022-08-3143591782.10 ppb
2022-08-3143591692.00 ppb
2022-08-3143591652.90 ppb
2022-11-1643847142.30 ppb
2022-11-164384717ND
2022-11-164384704ND
2022-11-164384697ND
2022-11-1643847122.20 ppb
2022-11-164384709ND
2022-11-164384702ND
2022-11-164384700ND
2023-02-164422937ND
2023-02-164422982ND
2023-02-164422946ND
2023-02-164422940ND
2023-02-164422965ND
2023-02-164422970ND
2023-02-164422932ND
2023-02-164422976ND
2023-05-304468969ND
2023-05-304468963ND
2023-05-304468961ND
2023-05-304468965ND
2023-05-304468967ND
2023-05-304468971ND
2023-05-304468959ND
2023-05-304468957ND
2023-08-2145070612.60 ppb
2023-08-2145070472.40 ppb
2023-08-2145070493.70 ppb
2023-08-2145070513.20 ppb
2023-08-2145070573.60 ppb
2023-08-2145070592.70 ppb
2023-08-2145070553.60 ppb
2023-08-2145070533.90 ppb
2023-11-274562894ND
2023-11-274562898ND
2023-11-274562890ND
2023-11-2745628922.10 ppb
2023-11-274562884ND
2023-11-274562886ND
2023-11-2745628962.00 ppb
2023-11-2745628882.00 ppb