Know Your Environment. Protect Your Health.

Haloacetic acids (HAA5)

Remlap-Pine Mountain Water Authority

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.

 

48

Samples

2

Samples exceeding legal limit (MCL)

21

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201828.4 ppb887.12 ppb - 80.3 ppb
20194.39 ppb86ND - 22.0 ppb
20200.375 ppb82ND - 2.00 ppb
2021ND80ND
20229.56 ppb85ND - 33.0 ppb
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 Lab ID Result
2018-02-16180216053-27.12 ppb
2018-02-16180216053-17.94 ppb
2018-05-18180518066-211.3 ppb
2018-05-18180518066-18.57 ppb
2018-08-1718080559-00117.3 ppb
2018-08-1718080559-00218.5 ppb
2018-11-1518110431-00180.3 ppb
2018-11-1518110431-00276.5 ppb
2019-02-1419020552-0013.70 ppb
2019-02-1419020552-0021.30 ppb
2019-05-1619050551-0012.10 ppb
2019-05-1619050551-0024.20 ppb
2019-08-1620117530002_DBP2ND
2019-08-1620117530001_DBP21.80 ppb
2019-11-1420130720001_DBP2ND
2019-11-1420130720002_DBP222.0 ppb
2020-02-1320142709001_DBP2ND
2020-02-1320142709002_DBP2ND
2020-05-1420154730001_DBP2ND
2020-05-1420154730002_DBP2ND
2020-08-1320167401001_DBP2ND
2020-08-1320167401002_DBP22.00 ppb
2020-11-1220179959001_DBP21.000 ppb
2020-11-1220179959002_DBP2ND
2021-02-1135612898001_DBP2ND
2021-02-1135612898002_DBP2ND
2021-05-1335633429001_DBP2ND
2021-05-1335633429002_DBP2ND
2021-08-1235655751001ND
2021-08-1235655751002ND
2021-11-1235677483001_DBP2ND
2021-11-1235677483002_DBP2ND
2022-02-1835698127001_DBP2ND
2022-02-1835698127002_DBP2ND
2022-05-1235717559001A_DBP26.50 ppb
2022-05-1235717559002A_DBP2ND
2022-08-1235739462001_DBP232.0 ppb
2022-08-1235739462002_DBP233.0 ppb
2022-11-1735761011001_DBP21.20 ppb
2022-11-1735761011002_DBP23.80 ppb
2023-02-1635780484001_DBP2ND
2023-02-1635780484002_DBP2ND
2023-05-1135799398001_DBP2ND
2023-05-1135799398002_DBP2ND
2023-08-1835821842001_DBP2ND
2023-08-1835821842002_DBP2ND
2023-11-3035844936001_DBP2ND
2023-11-3035844936002_DBP2ND