Know Your Environment. Protect Your Health.

Monochloroacetic acid

Town of Westlake

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.25 ppb42ND - 3.10 ppb
20191.43 ppb43ND - 2.40 ppb
20201.28 ppb43ND - 2.00 ppb
20210.575 ppb42ND - 1.20 ppb
2022ND40ND
20231.90 ppb43ND - 3.00 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
2018-01-11Q1801597001ND
2018-04-05Q18141430013.10 ppb
2018-07-02Q18262190011.90 ppb
2018-10-01Q1839294001ND
2019-02-13Q19065880021.60 ppb
2019-04-11Q19147300012.40 ppb
2019-08-01Q19501080011.70 ppb
2019-11-21Q1977743001ND
2020-03-03Q20079530011.80 ppb
2020-05-21Q20204480011.30 ppb
2020-09-01Q2034839001ND
2020-11-04Q20429420012.00 ppb
2021-02-08Q2103716001ND
2021-04-27Q21106610011.10 ppb
2021-08-02Q2120008001ND
2021-10-04Q21271330011.20 ppb
2022-01-06Q2200432002ND
2022-04-07Q2210851001ND
2022-07-11Q2219179001ND
2022-10-03Q2229802001ND
2023-01-26Q23037460013.00 ppb
2023-04-24Q23152590022.20 ppb
2023-08-17Q23346750012.40 ppb
2023-10-25Q2346055001ND