Know Your Environment. Protect Your Health.

Haloacetic acids (HAA5)

Sunbelt Fresh Water Supply District Oakwilde Subdivision

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

0

Samples exceeding legal limit (MCL)

31

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20185.21 ppb86ND - 10.7 ppb
20192.20 ppb84ND - 5.50 ppb
20202.83 ppb86ND - 7.10 ppb
20211.95 ppb84ND - 6.90 ppb
20227.08 ppb86ND - 16.5 ppb
20236.04 ppb85ND - 16.4 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
2018-01-29AE11219ND
2018-01-29AE112141.80 ppb
2018-04-10AE218539.70 ppb
2018-04-10AE2185110.7 ppb
2018-08-28AE386468.10 ppb
2018-08-28AE386503.60 ppb
2018-10-12AE43396ND
2018-10-12AE433977.80 ppb
2019-01-30AE521593.70 ppb
2019-01-30AE521775.00 ppb
2019-04-15AE622655.50 ppb
2019-04-15AE62266ND
2019-08-05AE77012ND
2019-08-05AE77008ND
2019-12-06AE91631ND
2019-12-18AE926943.40 ppb
2020-02-19AE989582.40 ppb
2020-02-19AE98959ND
2020-05-20AF120831.000 ppb
2020-05-20AF121127.10 ppb
2020-08-18AF240291.20 ppb
2020-08-18AF240305.60 ppb
2020-10-14AF305615.30 ppb
2020-10-14AF30562ND
2021-02-03AF424226.90 ppb
2021-02-03AF42442ND
2021-04-29AF51874ND
2021-04-29AF518762.00 ppb
2021-08-18AF668393.60 ppb
2021-08-18AF66843ND
2021-10-14AF73535ND
2021-10-14AF735403.10 ppb
2022-01-26AF818633.00 ppb
2022-01-26AF818951.90 ppb
2022-05-26AF98649ND
2022-05-26AF9865614.9 ppb
2022-08-22AG1020316.5 ppb
2022-08-22AG1020513.0 ppb
2022-12-15AG21928ND
2022-12-15AG219327.30 ppb
2023-03-07AG318498.70 ppb
2023-03-07AG31850ND
2023-05-03AG39101ND
2023-05-03AG391078.80 ppb
2023-07-19AG49295ND
2023-07-19AG4933216.4 ppb
2023-11-27Q235078000113.0 ppb
2023-11-27Q23507800021.40 ppb