Know Your Environment. Protect Your Health.

Haloacetic acids (HAA5)

State College Boro Water Auth.

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.

 

112

Samples

0

Samples exceeding legal limit (MCL)

38

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.776 ppb163ND - 6.42 ppb
20190.871 ppb164ND - 6.02 ppb
20201.25 ppb164ND - 6.56 ppb
20212.30 ppb289ND - 16.6 ppb
20224.13 ppb209ND - 22.9 ppb
20233.72 ppb169ND - 12.2 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
2018-02-148B14168-01ND
2018-02-148B14168-02ND
2018-02-148B14168-03ND
2018-02-148B14168-04ND
2018-05-158E16034-01ND
2018-05-158E16034-02ND
2018-05-158E16034-036.42 ppb
2018-05-158E16034-04ND
2018-08-158H16067-01ND
2018-08-158H16067-022.89 ppb
2018-08-158H16067-033.10 ppb
2018-08-158H16067-04ND
2018-11-138K13106-01ND
2018-11-138K13106-02ND
2018-11-138K13106-03ND
2018-11-138K13106-04ND
2019-02-129B12132-01ND
2019-02-129B12132-02ND
2019-02-129B12132-03ND
2019-02-129B12132-04ND
2019-05-139E14034-06ND
2019-05-139E14034-07ND
2019-05-139E14034-08ND
2019-05-139E14034-09ND
2019-08-149H15047-013.05 ppb
2019-08-149H15047-022.69 ppb
2019-08-149H15047-036.02 ppb
2019-08-149H15047-04ND
2019-11-149K15090-01ND
2019-11-149K15090-022.18 ppb
2019-11-149K15090-03ND
2019-11-149K15090-04ND
2020-02-18ND
2020-02-18ND
2020-02-18ND
2020-02-18ND
2020-05-135.11 ppb
2020-05-13ND
2020-05-13ND
2020-05-13ND
2020-08-17ND
2020-08-173.89 ppb
2020-08-176.56 ppb
2020-08-17ND
2020-10-144.48 ppb
2020-10-14ND
2020-10-14ND
2020-10-14ND
2021-02-16ND
2021-02-16ND
2021-02-16ND
2021-02-16ND
2021-05-123.13 ppb
2021-05-12ND
2021-05-12ND
2021-05-12ND
2021-05-125.10 ppb
2021-05-12ND
2021-05-12ND
2021-05-12ND
2021-08-16ND
2021-08-163.24 ppb
2021-08-1610.5 ppb
2021-08-16ND
2021-08-1616.6 ppb
2021-08-162.61 ppb
2021-08-16ND
2021-08-162.04 ppb
2021-11-15ND
2021-11-155.81 ppb
2021-11-15ND
2021-11-15ND
2021-11-1515.4 ppb
2021-11-15ND
2021-11-15ND
2021-11-15ND
2022-02-15ND
2022-02-154.04 ppb
2022-02-15ND
2022-02-15ND
2022-02-156.25 ppb
2022-02-15ND
2022-02-15ND
2022-02-15ND
2022-05-16ND
2022-05-162.07 ppb
2022-05-16ND
2022-05-16ND
2022-08-16ND
2022-08-167.10 ppb
2022-08-1622.9 ppb
2022-08-1617.4 ppb
2022-11-16ND
2022-11-164.68 ppb
2022-11-163.96 ppb
2022-11-1614.1 ppb
2023-02-14ND
2023-02-145.05 ppb
2023-02-14ND
2023-02-14ND
2023-05-15ND
2023-06-1412.2 ppb
2023-06-147.20 ppb
2023-06-147.40 ppb
2023-08-143.20 ppb
2023-08-14ND
2023-08-147.40 ppb
2023-08-149.30 ppb
2023-11-13ND
2023-11-133.80 ppb
2023-11-13ND
2023-11-133.90 ppb