Know Your Environment. Protect Your Health.

Monochloroacetic acid

North City Water District

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.

 

80

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.226 ppb162ND - 1.96 ppb
20190.774 ppb165ND - 3.15 ppb
2020N/A00N/A
20211.66 ppb1612ND - 2.84 ppb
20220.828 ppb167ND - 2.20 ppb
20231.13 ppb169ND - 2.41 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
2018-02-13ND
2018-02-13ND
2018-02-13ND
2018-02-131.96 ppb
2018-05-16ND
2018-05-16ND
2018-05-16ND
2018-05-16ND
2018-08-02ND
2018-08-02ND
2018-08-021.66 ppb
2018-08-02ND
2018-11-14ND
2018-11-14ND
2018-11-14ND
2018-11-14ND
2019-02-21ND
2019-02-21ND
2019-02-21ND
2019-02-21ND
2019-05-15ND
2019-05-152.38 ppb
2019-05-15ND
2019-05-15ND
2019-08-132.78 ppb
2019-08-133.15 ppb
2019-08-13ND
2019-08-13ND
2019-11-13ND
2019-11-13ND
2019-11-132.06 ppb
2019-11-132.02 ppb
2021-02-0940785962.84 ppb
2021-02-0940785942.73 ppb
2021-02-0940785952.61 ppb
2021-02-0940785972.74 ppb
2021-05-1141209972.06 ppb
2021-05-1141209951.57 ppb
2021-05-1141209942.37 ppb
2021-05-1141209961.79 ppb
2021-08-124172310ND
2021-08-1241723091.85 ppb
2021-08-124172311ND
2021-08-124172312ND
2021-11-1042062091.68 ppb
2021-11-1042062062.60 ppb
2021-11-104206208ND
2021-11-1042062071.79 ppb
2022-02-084244625ND
2022-02-084244624ND
2022-02-084244626ND
2022-02-0842446231.59 ppb
2022-05-1042848241.69 ppb
2022-05-1042848262.20 ppb
2022-05-104284827ND
2022-05-1042848252.16 ppb
2022-08-104330606ND
2022-08-104330605ND
2022-08-104330607ND
2022-08-104330608ND
2022-11-0943743501.99 ppb
2022-11-0943743512.09 ppb
2022-11-094374353ND
2022-11-0943743521.52 ppb
2023-02-134412819ND
2023-02-134412822ND
2023-02-134412820ND
2023-02-134412821ND
2023-05-0444522761.78 ppb
2023-05-0444522782.12 ppb
2023-05-044452279ND
2023-05-0444522772.32 ppb
2023-08-0144991731.94 ppb
2023-08-0144991741.75 ppb
2023-08-0144991751.52 ppb
2023-08-0144991722.22 ppb
2023-11-064548273ND
2023-11-0645482712.41 ppb
2023-11-064548272ND
2023-11-0645482742.01 ppb