Know Your Environment. Protect Your Health.

Haloacetic acids (HAA5)

Villages of Bocage- Madisonville

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.

 

64

Samples

0

Samples exceeding legal limit (MCL)

37

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.00 ppb1612ND - 2.20 ppb
20191.07 ppb16160.610 ppb - 1.40 ppb
20200.178 ppb82ND - 0.810 ppb
20210.158 ppb82ND - 0.820 ppb
20220.674 ppb84ND - 1.70 ppb
20233.95 ppb81ND - 31.6 ppb

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
2018-02-0235371897001ND
2018-02-0235371897002ND
2018-02-0235371897002ND
2018-02-0235371897001ND
2018-05-03353903220021.55 ppb
2018-05-03353903220011.54 ppb
2018-05-03353903220021.55 ppb
2018-05-03353903220011.54 ppb
2018-08-01354082730012.20 ppb
2018-08-01354082730022.00 ppb
2018-08-01354082730012.20 ppb
2018-08-01354082730022.00 ppb
2018-11-15354322770010.370 ppb
2018-11-15354322770010.370 ppb
2018-11-15354322770020.370 ppb
2018-11-15354322770020.370 ppb
2019-02-21354500290011.000 ppb
2019-02-21354500290021.03 ppb
2019-02-21354500290011.000 ppb
2019-02-21354500290021.03 ppb
2019-05-08354682940011.40 ppb
2019-05-08354682940021.37 ppb
2019-05-08354682940011.40 ppb
2019-05-08354682940021.37 ppb
2019-08-07354884540021.04 ppb
2019-08-07354884540011.28 ppb
2019-08-07354884540011.28 ppb
2019-08-07354884540021.04 ppb
2019-11-15355128710010.850 ppb
2019-11-15355128710020.610 ppb
2019-11-15355128710020.610 ppb
2019-11-15355128710010.850 ppb
2020-02-07355295090020.610 ppb
2020-02-07355295090010.810 ppb
2020-05-0835548829001ND
2020-05-0835548829002ND
2020-08-1335570704001ND
2020-08-1335570704002ND
2020-11-0635590520001ND
2020-11-0635590520002ND
2021-02-0535610009001ND
2021-02-0535610009002ND
2021-05-0735631657001ND
2021-05-0735631657002ND
2021-08-06356537870010.820 ppb
2021-08-06356537870020.440 ppb
2021-11-0535676310001ND
2021-11-0535676310002ND
2022-02-11356965850021.19 ppb
2022-02-11356965850011.20 ppb
2022-05-06357159290021.30 ppb
2022-05-06357159290011.70 ppb
2022-08-0335737001009ND
2022-08-0335737001010ND
2022-11-0435758185001ND
2022-11-0435758185002ND
2023-02-0335776978001ND
2023-02-0335776978002ND
2023-05-0535797780001ND
2023-05-0535797780002ND
2023-08-0435818388001ND
2023-08-0435818388002ND
2023-11-0335839347001ND
2023-11-033583934700231.6 ppb