Know Your Environment. Protect Your Health.

Haloacetic acids (HAA5)

Woodridge Village

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.

 

23

Samples

2

Samples exceeding legal limit (MCL)

23

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201845.0 ppb4434.0 ppb - 65.0 ppb
201934.4 ppb2230.1 ppb - 38.7 ppb
202022.9 ppb5517.5 ppb - 29.0 ppb
202135.1 ppb4415.0 ppb - 56.1 ppb
202234.3 ppb4423.0 ppb - 61.0 ppb
202328.0 ppb4418.0 ppb - 45.0 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
2018-03-01DBP J8C029134.0 ppb
2018-05-10DBP J8E0880-0141.0 ppb
2018-07-19DBP J8G1736-0165.0 ppb
2018-11-15DBP J8K0981-01,240.0 ppb
2019-02-28DBP J9B1399-0138.7 ppb
2019-07-25DBP J9G1503-0130.1 ppb
2020-02-05DBP S00002331517.5 ppb
2020-05-04HAA5 S00002652025.9 ppb
2020-07-31DBP9 S00003228521.1 ppb
2020-08-03DBP9 S00003018721.1 ppb
2020-11-03DBP S030182,9529.0 ppb
2021-03-24DBP 369667-0115.0 ppb
2021-05-19DBP 37129928.0 ppb
2021-08-10DBP S062168,5741741.2 ppb
2021-11-03DBP S068292,356.1 ppb
2022-02-08DBP S07481425.2 ppb
2022-05-10DBP S074282,1327.9 ppb
2022-08-02DBP S000074783,91061.0 ppb
2022-11-09DBP S0103915,3123.0 ppb
2023-02-08DBP S0137412,0022.0 ppb
2023-05-02DBP SO137398, 41318.0 ppb
2023-08-10DBP S0137399,40745.0 ppb
2023-11-15DBP S00016618327.0 ppb