Know Your Environment. Protect Your Health.

Haloacetic acids (HAA5)

North Village Special Service District

Haloacetic acids are formed when disinfectants such as chlorine are added to tap water. The group of five haloacetic acids regulated by federal standards includes monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid and dibromoacetic acid. Read More.

Haloacetic acids are harmful during pregnancy and may increase the risk of cancer. Haloacetic acids are� genotoxic, which means that they induce mutations and DNA damage. Multiple studies by the National Toxicology Program have demonstrated the cancer-causing properties of individual haloacetic acids in laboratory animals. The Department of Health and Human Services is currently considering listing di- or tri-haloacetic acids for possible inclusion in its comprehensive Report on Carcinogens.

Click here to read more about disinfection byproducts.

 

46

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND80ND
20192.08 ppb83ND - 11.8 ppb
20200.463 ppb81ND - 3.70 ppb
20210.250 ppb81ND - 2.00 ppb
2022ND60ND
2023ND80ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for the group of five haloacetic acids, or HAA5, was defined in a peer-reviewed scientific study by EWG and represents a one-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL): 60 ppb

The legal limit for the group of five haloacetic acids (HAA5), established in 1998, was based on the need for residual disinfectant levels in water served to customers and the cost of treatment. This limit does not fully protect against the risk of cancer and harm to the developing fetus due to exposure to haloacetic acids.

ppb = parts per billion

All test results

Date Result
2018-01-10ND
2018-01-10ND
2018-04-09ND
2018-04-09ND
2018-07-03ND
2018-07-03ND
2018-10-16ND
2018-10-16ND
2019-03-11ND
2019-03-112.60 ppb
2019-06-1911.8 ppb
2019-06-19ND
2019-09-10ND
2019-09-10ND
2019-12-032.20 ppb
2019-12-03ND
2020-03-17ND
2020-03-17ND
2020-06-09ND
2020-06-09ND
2020-09-02ND
2020-09-02ND
2020-12-01ND
2020-12-013.70 ppb
2021-03-092.00 ppb
2021-03-09ND
2021-06-08ND
2021-06-08ND
2021-09-15ND
2021-09-15ND
2021-12-02ND
2021-12-02ND
2022-03-08ND
2022-03-08ND
2022-06-16ND
2022-06-16ND
2022-09-12ND
2022-09-12ND
2023-03-14ND
2023-03-14ND
2023-06-12ND
2023-06-12ND
2023-09-06ND
2023-09-06ND
2023-12-04ND
2023-12-04ND