Know Your Environment. Protect Your Health.

Monochloroacetic acid

Clayton Water Supply Corporation Plant 3 and 7

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
20183.33 ppb42ND - 8.70 ppb
20192.95 ppb42ND - 5.90 ppb
2020ND40ND
20210.500 ppb41ND - 2.00 ppb
2022ND40ND
20236.60 ppb43ND - 14.6 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
2018-02-22Q1807615001ND
2018-05-24Q18209430014.60 ppb
2018-08-23Q1833946008ND
2018-12-14Q18517840018.70 ppb
2019-02-05Q19052140055.90 ppb
2019-04-30Q19172520015.90 ppb
2019-08-26Q1959271001ND
2019-12-17Q1980333001ND
2020-03-05Q2008342005ND
2020-05-27Q2020839001ND
2020-09-22Q2037533001ND
2020-12-03Q2048553001ND
2021-02-24Q2104970001ND
2021-04-29Q2110985001ND
2021-09-28Q21265210062.00 ppb
2021-12-02Q2133315001ND
2022-02-01Q2203638001ND
2022-04-12Q2211209001ND
2022-09-13Q2227119001ND
2022-11-03Q2233353006ND
2023-02-16Q230653700114.6 ppb
2023-05-03Q231680000110.6 ppb
2023-07-27Q23302700051.20 ppb
2023-10-17Q2344249001ND