Know Your Environment. Protect Your Health.

Haloacetic acids (HAA5)

Middletown Water Department

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

0

Samples exceeding legal limit (MCL)

96

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201825.1 ppb161616.3 ppb - 30.9 ppb
201921.8 ppb161612.3 ppb - 34.4 ppb
202022.2 ppb161615.1 ppb - 26.7 ppb
202129.3 ppb161619.0 ppb - 49.3 ppb
202230.0 ppb161621.6 ppb - 36.8 ppb
202333.0 ppb161626.9 ppb - 40.1 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
2018-01-05DBP 20048541124.0 ppb
2018-01-05DBP 20048541219.2 ppb
2018-01-05DBP 20048541325.3 ppb
2018-01-05DBP 20048541022.6 ppb
2018-04-05DBP 20049144628.3 ppb
2018-04-05DBP 20049144729.5 ppb
2018-04-05DBP 20049144830.9 ppb
2018-04-05DBP 20049144929.4 ppb
2018-07-04DBP 20049863828.7 ppb
2018-07-04DBP 20049863926.3 ppb
2018-07-04DBP 20049864026.6 ppb
2018-07-04DBP 20049864129.5 ppb
2018-10-04DBP 20050804823.3 ppb
2018-10-04DBP 20050805019.0 ppb
2018-10-04DBP 20050804916.3 ppb
2018-10-04DBP 20050804722.0 ppb
2019-01-03DBP 20051750626.7 ppb
2019-01-03DBP 20051750725.0 ppb
2019-01-03DBP 20051750819.2 ppb
2019-01-03DBP 20051750926.3 ppb
2019-04-04DBP 20052718228.4 ppb
2019-04-04DBP 20052718329.3 ppb
2019-04-04DBP 20052718434.4 ppb
2019-04-04DBP 20052718531.7 ppb
2019-07-03DBP 20053892322.0 ppb
2019-07-03DBP 20053892513.3 ppb
2019-07-03DBP 20053892413.2 ppb
2019-07-03DBP 20053892214.9 ppb
2019-10-17DBP 20055333512.3 ppb
2019-10-17DBP 20055333717.0 ppb
2019-10-17DBP 20055333917.9 ppb
2019-10-17DBP 20055333317.4 ppb
2020-01-09DBP 20056231315.1 ppb
2020-01-09DBP 20056231416.9 ppb
2020-01-09DBP 20056231518.9 ppb
2020-01-09DBP 20056231620.8 ppb
2020-04-09DBP 20057189625.3 ppb
2020-04-09DBP 20057189722.7 ppb
2020-04-09DBP 20057189525.0 ppb
2020-04-09DBP 20057189325.6 ppb
2020-07-09DBP 20058208423.6 ppb
2020-07-09DBP 20058208521.4 ppb
2020-07-09DBP 20058208626.7 ppb
2020-07-09DBP 20058208726.1 ppb
2020-10-15DBP 20059416722.5 ppb
2020-10-15DBP 20059416818.7 ppb
2020-10-15DBP 20059416924.3 ppb
2020-10-15DBP 20059417021.0 ppb
2021-01-14DBP 20060390223.5 ppb
2021-01-14DBP 20060389927.4 ppb
2021-01-14DBP 20060390022.5 ppb
2021-01-14DBP 20060390119.0 ppb
2021-04-15DBP 20061333827.7 ppb
2021-04-15DBP 20061333925.9 ppb
2021-04-15DBP 20061334031.9 ppb
2021-04-15DBP 20061333732.2 ppb
2021-07-08DBP 20062369128.1 ppb
2021-07-08DBP 20062369321.8 ppb
2021-07-08DBP 20062370824.4 ppb
2021-07-08DBP 20062370922.6 ppb
2021-10-21B300086252 30008625342.0 ppb
2021-10-21B300086249 30008625028.8 ppb
2021-10-21B300086246 30008624749.3 ppb
2021-10-21B300086243 30008624441.3 ppb
2022-01-06D300128620 30012862133.3 ppb
2022-01-06D300128623 30012862435.2 ppb
2022-01-06D300128626 30012862736.8 ppb
2022-01-06D300128629 30012863031.7 ppb
2022-04-07D300167654 30016765529.6 ppb
2022-04-07D300167657 30016765827.7 ppb
2022-04-07D300167660 30016766130.9 ppb
2022-04-07D300167663 30016766426.0 ppb
2022-07-07D300209440 30020944129.3 ppb
2022-07-07D300209434 30020943526.0 ppb
2022-07-07D300209431 30020943221.6 ppb
2022-07-07D300209437 30020943833.4 ppb
2022-10-27D300264516 30026451728.7 ppb
2022-10-27D300264519 30026452032.2 ppb
2022-10-27D300264522 30026452327.8 ppb
2022-10-27D300264525 30026452629.5 ppb
2023-01-12D300297210 30029721131.7 ppb
2023-01-12D300297213 30029721426.9 ppb
2023-01-12D300297216 30029721732.0 ppb
2023-01-12D300297219 30029722032.7 ppb
2023-04-20D300336742 30033674330.3 ppb
2023-04-20D300336748 30033674937.5 ppb
2023-04-20D300336745 30033674634.3 ppb
2023-04-20D300336739 30033674031.8 ppb
2023-07-06D300377098 30037709927.9 ppb
2023-07-06D300377101 30037710240.1 ppb
2023-07-06D300377104 30037710536.2 ppb
2023-07-06D300377107 30037710834.8 ppb
2023-10-19D300433229 30043323031.5 ppb
2023-10-19D300433232 30043323332.1 ppb
2023-10-19D300433235 30043323634.9 ppb
2023-10-19D300433238 30043323933.3 ppb