Know Your Environment. Protect Your Health.

Monochloroacetic acid

New London Water Association

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.

 

47

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND80ND
2019ND70ND
2020ND80ND
20210.275 ppb81ND - 2.20 ppb
2022ND80ND
20230.323 ppb81ND - 2.58 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
2018-03-1218073001801ND
2018-03-1218073001901ND
2018-06-1118165004201ND
2018-06-1118165004101ND
2018-09-1118256003501ND
2018-09-1118256003601ND
2018-12-0318340004001ND
2018-12-0318340003901ND
2019-03-1219073002401ND
2019-03-1219073002301ND
2019-06-1919171004101ND
2019-09-0919255000701ND
2019-09-0919255000801ND
2019-12-0319339000501ND
2019-12-0319339000601ND
2020-03-0220064000501ND
2020-03-0220064000401ND
2020-06-2920183002001ND
2020-06-2920183001901ND
2020-09-0720254000801ND
2020-09-0720254000701ND
2020-11-3020338002501ND
2020-11-3020338002401ND
2021-03-1021070010701ND
2021-03-10210700108012.20 ppb
2021-06-0921161002501ND
2021-06-0921161002401ND
2021-09-0821252002701ND
2021-09-0821252002601ND
2021-12-0721342003401ND
2021-12-0721342003301ND
2022-03-02O195920-HAA-1ND
2022-03-02O195921-HAA-1ND
2022-06-07O198857-HAA-1ND
2022-06-07O198856-HAA-1ND
2022-09-07O201982-HAA-1ND
2022-09-07O201981-HAA-1ND
2022-12-05O204260-HAA-1ND
2022-12-05O204259-HAA-1ND
2023-03-07O206918-HAA-12.58 ppb
2023-03-29O207374-HAA-1ND
2023-06-14O209996-HAA-1ND
2023-06-14O209995-HAA-1ND
2023-09-06O211851-HAA-1ND
2023-09-25O212287-HAA-1ND
2023-12-05O214314-HAA-1ND
2023-12-05O214315-HAA-1ND