Know Your Environment. Protect Your Health.

Haloacetic acids (HAA5)

Bradford City 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.

 

96

Samples

3

Samples exceeding legal limit (MCL)

96

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201835.6 ppb16169.00 ppb - 65.0 ppb
201938.2 ppb161621.9 ppb - 60.7 ppb
202030.9 ppb161613.1 ppb - 54.4 ppb
202121.5 ppb16166.20 ppb - 32.0 ppb
202221.0 ppb16167.21 ppb - 39.3 ppb
202319.4 ppb161615.1 ppb - 29.5 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
2018-03-14(704) 704 Co46.0 ppb
2018-03-14(703) 703 Co63.0 ppb
2018-03-14(701) 701 Co57.0 ppb
2018-03-14(702) 702 Co9.00 ppb
2018-06-12(703) 703 Co27.0 ppb
2018-06-12(701) 701 Co27.0 ppb
2018-06-12(704) 704 Co65.0 ppb
2018-06-12(702) 702 Co12.0 ppb
2018-09-18(703) 703 Co23.0 ppb
2018-09-18(701) 701 Co30.0 ppb
2018-09-18(704) 704 Co44.0 ppb
2018-09-18(702) 702 Co50.0 ppb
2018-12-18(702) 702 Co30.0 ppb
2018-12-18(703) 703 Co26.0 ppb
2018-12-18(704) 704 Co28.0 ppb
2018-12-18(701) 701 Co33.0 ppb
2019-03-1219C1742-0221.9 ppb
2019-03-1219C1742-0444.1 ppb
2019-03-1219C1742-0335.5 ppb
2019-03-1219C1742-0160.7 ppb
2019-06-1219F0212-0352.3 ppb
2019-06-1219F0212-0248.8 ppb
2019-06-1219F0212-0136.6 ppb
2019-06-1219F0212-0428.1 ppb
2019-09-1719I0850-0124.5 ppb
2019-09-1719I0850-0444.5 ppb
2019-09-1719I0850-0337.3 ppb
2019-09-1719I0850-0229.6 ppb
2019-12-1719L0037-0433.6 ppb
2019-12-1719L0037-0340.6 ppb
2019-12-1719L0037-0238.7 ppb
2019-12-1719L0037-0134.9 ppb
2020-03-1745.9 ppb
2020-03-1737.9 ppb
2020-03-1728.3 ppb
2020-03-1751.9 ppb
2020-06-1654.4 ppb
2020-06-1635.4 ppb
2020-06-1627.5 ppb
2020-06-1633.1 ppb
2020-09-3017.4 ppb
2020-09-3016.3 ppb
2020-09-3013.1 ppb
2020-09-3016.6 ppb
2020-12-1523.4 ppb
2020-12-1548.0 ppb
2020-12-1516.1 ppb
2020-12-1528.7 ppb
2021-03-1723.4 ppb
2021-03-1718.2 ppb
2021-03-1723.9 ppb
2021-03-1721.4 ppb
2021-06-1614.6 ppb
2021-06-1617.0 ppb
2021-06-1625.8 ppb
2021-06-166.20 ppb
2021-09-1532.0 ppb
2021-09-1524.1 ppb
2021-09-1522.8 ppb
2021-09-1518.9 ppb
2021-12-1525.4 ppb
2021-12-1525.7 ppb
2021-12-1522.0 ppb
2021-12-1522.9 ppb
2022-03-1539.3 ppb
2022-03-1526.0 ppb
2022-03-1531.4 ppb
2022-03-1533.2 ppb
2022-06-1414.8 ppb
2022-06-1416.0 ppb
2022-06-1413.6 ppb
2022-06-1415.5 ppb
2022-09-1325.0 ppb
2022-09-1310.2 ppb
2022-09-138.14 ppb
2022-09-137.21 ppb
2022-12-1424.9 ppb
2022-12-1422.6 ppb
2022-12-1428.2 ppb
2022-12-1420.7 ppb
2023-03-1421.3 ppb
2023-03-1416.1 ppb
2023-03-1417.2 ppb
2023-03-1429.5 ppb
2023-06-1418.0 ppb
2023-06-1418.5 ppb
2023-06-1417.1 ppb
2023-06-1421.1 ppb
2023-09-1316.6 ppb
2023-09-1318.4 ppb
2023-09-1317.0 ppb
2023-09-1315.1 ppb
2023-12-1319.4 ppb
2023-12-1325.7 ppb
2023-12-1315.6 ppb
2023-12-1323.0 ppb