Know Your Environment. Protect Your Health.

Haloacetic acids (HAA5)

City of Crosbyton

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20189.65 ppb42ND - 37.4 ppb
20190.625 ppb42ND - 1.40 ppb
2020ND40ND
20210.300 ppb41ND - 1.20 ppb
20220.325 ppb41ND - 1.30 ppb
20232.55 ppb42ND - 7.70 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
2018-02-06Q1804611007ND
2018-04-24Q18165110021.20 ppb
2018-07-17Q182822900237.4 ppb
2018-11-14Q1846235001ND
2019-02-12Q19062000041.10 ppb
2019-05-01Q1917586001ND
2019-08-06Q19514210011.40 ppb
2019-10-09Q1972065001ND
2020-03-09Q2008466003ND
2020-05-19Q2019884004ND
2020-09-15Q2036515001ND
2020-11-16Q2044958002ND
2021-03-04Q2105770002ND
2021-04-29Q2110926009ND
2021-08-11Q21214230011.20 ppb
2021-12-02Q2133344001ND
2022-03-14Q2208564004ND
2022-06-02Q2215629001ND
2022-09-06Q2226329001ND
2022-12-08Q22369570011.30 ppb
2023-02-09Q2305227005ND
2023-04-27Q23158580027.70 ppb
2023-08-17Q23346830012.50 ppb
2023-10-11Q2343429001ND