Know Your Environment. Protect Your Health.

Monochloroacetic acid

Town of Sunnyvale

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.15 ppb85ND - 2.90 ppb
20191.30 ppb86ND - 2.40 ppb
20200.838 ppb84ND - 2.20 ppb
20211.10 ppb84ND - 3.10 ppb
20221.03 ppb85ND - 2.00 ppb
20232.23 ppb881.30 ppb - 3.70 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
2018-01-04Q1800388002ND
2018-01-04Q1800388001ND
2018-05-08Q18184650032.90 ppb
2018-05-08Q18184650011.80 ppb
2018-07-24Q1829297001ND
2018-07-24Q18292970021.50 ppb
2018-10-17Q18414690011.90 ppb
2018-10-17Q18414690021.10 ppb
2019-01-08Q19008020011.40 ppb
2019-01-08Q19008020021.70 ppb
2019-04-24Q19167550012.40 ppb
2019-04-24Q19167550022.10 ppb
2019-07-22Q19467640021.40 ppb
2019-07-22Q19467640011.40 ppb
2019-10-01Q1970772001ND
2019-10-01Q1970772002ND
2020-01-08Q2000841001ND
2020-01-08Q20008410021.000 ppb
2020-04-29Q20167030012.20 ppb
2020-04-29Q20167030022.10 ppb
2020-07-13Q2027173001ND
2020-07-13Q20271730021.40 ppb
2020-10-06Q2039032001ND
2020-10-06Q2039032002ND
2021-01-06Q2100421002ND
2021-01-06Q21004210032.00 ppb
2021-04-22Q21103920013.10 ppb
2021-04-22Q21103920022.30 ppb
2021-08-02Q2119999001ND
2021-08-02Q21199990021.40 ppb
2021-10-28Q2130420001ND
2021-10-28Q2130420002ND
2022-02-17Q22059690011.10 ppb
2022-02-17Q2205969002ND
2022-04-21Q22122110011.90 ppb
2022-04-21Q22122110021.40 ppb
2022-09-13Q2227140002ND
2022-09-13Q22271400031.80 ppb
2022-10-04Q2229787001ND
2022-10-04Q22297870022.00 ppb
2023-01-26Q23037420011.40 ppb
2023-01-26Q23037420021.30 ppb
2023-05-08Q23173400013.70 ppb
2023-05-08Q23173400023.30 ppb
2023-08-02Q23314500021.70 ppb
2023-08-02Q23314500032.30 ppb
2023-10-17Q23442480011.90 ppb
2023-10-17Q23442480022.20 ppb