Know Your Environment. Protect Your Health.

Monochloroacetic acid

City of Joaquin

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.

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20186.50 ppb443.50 ppb - 9.70 ppb
20191.78 ppb82ND - 7.40 ppb
20200.250 ppb81ND - 2.00 ppb
20210.750 ppb41ND - 3.00 ppb
20221.85 ppb43ND - 3.30 ppb
20233.18 ppb442.30 ppb - 5.20 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
2018-09-27Q18387000113.50 ppb
2018-09-27Q18387000109.70 ppb
2018-12-11Q18506730015.10 ppb
2018-12-11Q18506730027.70 ppb
2019-03-14Q1910906001ND
2019-03-14Q1910906002ND
2019-05-15Q19256740046.80 ppb
2019-05-15Q19256740057.40 ppb
2019-09-30Q1969941001ND
2019-09-30Q1969941002ND
2019-12-05Q1979152001ND
2019-12-05Q1979152002ND
2020-03-05Q2008347004ND
2020-03-05Q2008347005ND
2020-05-13Q2018935001ND
2020-05-13Q2018935002ND
2020-09-01Q2035105001ND
2020-09-01Q2035105002ND
2020-11-04Q20430730012.00 ppb
2020-11-04Q2043073002ND
2021-01-26Q2101842010ND
2021-04-13Q21094010013.00 ppb
2021-08-04Q2120442001ND
2021-10-18Q2129052001ND
2022-03-14Q22084630051.50 ppb
2022-05-23Q22149600013.30 ppb
2022-08-11Q2223336001ND
2022-11-14Q22340280012.60 ppb
2023-02-15Q23063010042.30 ppb
2023-04-25Q23155360012.50 ppb
2023-07-05Q23260360015.20 ppb
2023-10-02Q23421000012.70 ppb