Know Your Environment. Protect Your Health.

Monochloroacetic acid

Bear Mountain Water Supply

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
20182.15 ppb42ND - 5.40 ppb
20191.16 ppb52ND - 3.20 ppb
20201.83 ppb42ND - 3.90 ppb
20210.268 ppb41ND - 1.07 ppb
20223.69 ppb223.07 ppb - 4.30 ppb
20230.394 ppb51ND - 1.97 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
2018-02-05THAAS 02061811:4ND
2018-05-07HAA5 05071819-2ND
2018-07-25HAA5 08091821-65.40 ppb
2018-11-13HAA5 11151803: 23.20 ppb
2019-02-05HAA5 02061903A:2ND
2019-02-05HAA5S 02061903A:1ND
2019-05-07HAA5S 05091905ND
2019-08-07HAA5 081419073.20 ppb
2019-11-04HAA5S QB1927482.60 ppb
2020-02-04DBP 02062004:2ND
2020-05-13DBP9 05132006:2ND
2020-08-13HAA5 08132013:23.90 ppb
2020-11-04DBP 11042008-23.40 ppb
2021-02-16HAA5 11042008:2ND
2021-05-05DBP 05052105:21.07 ppb
2021-08-03HAA5S 08042105C:2ND
2021-11-17HAA5S 11172114:2ND
2022-09-14HAA5S 09142230-44.30 ppb
2022-10-25HAA5S 10262215B:53.07 ppb
2023-01-19HAA5S 01192309-1ND
2023-06-15HAA5 06152304:21.97 ppb
2023-09-26HAA5 10042313B2ND
2023-10-06HAA5 12132334:2ND
2023-12-06HAA5 12132334-2ND