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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 25.1 ppb | 16 | 16 | 16.3 ppb - 30.9 ppb |
| 2019 | 21.8 ppb | 16 | 16 | 12.3 ppb - 34.4 ppb |
| 2020 | 22.2 ppb | 16 | 16 | 15.1 ppb - 26.7 ppb |
| 2021 | 29.3 ppb | 16 | 16 | 19.0 ppb - 49.3 ppb |
| 2022 | 30.0 ppb | 16 | 16 | 21.6 ppb - 36.8 ppb |
| 2023 | 33.0 ppb | 16 | 16 | 26.9 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 |
|---|---|---|
| 2018-01-05 | DBP 200485411 | 24.0 ppb |
| 2018-01-05 | DBP 200485412 | 19.2 ppb |
| 2018-01-05 | DBP 200485413 | 25.3 ppb |
| 2018-01-05 | DBP 200485410 | 22.6 ppb |
| 2018-04-05 | DBP 200491446 | 28.3 ppb |
| 2018-04-05 | DBP 200491447 | 29.5 ppb |
| 2018-04-05 | DBP 200491448 | 30.9 ppb |
| 2018-04-05 | DBP 200491449 | 29.4 ppb |
| 2018-07-04 | DBP 200498638 | 28.7 ppb |
| 2018-07-04 | DBP 200498639 | 26.3 ppb |
| 2018-07-04 | DBP 200498640 | 26.6 ppb |
| 2018-07-04 | DBP 200498641 | 29.5 ppb |
| 2018-10-04 | DBP 200508048 | 23.3 ppb |
| 2018-10-04 | DBP 200508050 | 19.0 ppb |
| 2018-10-04 | DBP 200508049 | 16.3 ppb |
| 2018-10-04 | DBP 200508047 | 22.0 ppb |
| 2019-01-03 | DBP 200517506 | 26.7 ppb |
| 2019-01-03 | DBP 200517507 | 25.0 ppb |
| 2019-01-03 | DBP 200517508 | 19.2 ppb |
| 2019-01-03 | DBP 200517509 | 26.3 ppb |
| 2019-04-04 | DBP 200527182 | 28.4 ppb |
| 2019-04-04 | DBP 200527183 | 29.3 ppb |
| 2019-04-04 | DBP 200527184 | 34.4 ppb |
| 2019-04-04 | DBP 200527185 | 31.7 ppb |
| 2019-07-03 | DBP 200538923 | 22.0 ppb |
| 2019-07-03 | DBP 200538925 | 13.3 ppb |
| 2019-07-03 | DBP 200538924 | 13.2 ppb |
| 2019-07-03 | DBP 200538922 | 14.9 ppb |
| 2019-10-17 | DBP 200553335 | 12.3 ppb |
| 2019-10-17 | DBP 200553337 | 17.0 ppb |
| 2019-10-17 | DBP 200553339 | 17.9 ppb |
| 2019-10-17 | DBP 200553333 | 17.4 ppb |
| 2020-01-09 | DBP 200562313 | 15.1 ppb |
| 2020-01-09 | DBP 200562314 | 16.9 ppb |
| 2020-01-09 | DBP 200562315 | 18.9 ppb |
| 2020-01-09 | DBP 200562316 | 20.8 ppb |
| 2020-04-09 | DBP 200571896 | 25.3 ppb |
| 2020-04-09 | DBP 200571897 | 22.7 ppb |
| 2020-04-09 | DBP 200571895 | 25.0 ppb |
| 2020-04-09 | DBP 200571893 | 25.6 ppb |
| 2020-07-09 | DBP 200582084 | 23.6 ppb |
| 2020-07-09 | DBP 200582085 | 21.4 ppb |
| 2020-07-09 | DBP 200582086 | 26.7 ppb |
| 2020-07-09 | DBP 200582087 | 26.1 ppb |
| 2020-10-15 | DBP 200594167 | 22.5 ppb |
| 2020-10-15 | DBP 200594168 | 18.7 ppb |
| 2020-10-15 | DBP 200594169 | 24.3 ppb |
| 2020-10-15 | DBP 200594170 | 21.0 ppb |
| 2021-01-14 | DBP 200603902 | 23.5 ppb |
| 2021-01-14 | DBP 200603899 | 27.4 ppb |
| 2021-01-14 | DBP 200603900 | 22.5 ppb |
| 2021-01-14 | DBP 200603901 | 19.0 ppb |
| 2021-04-15 | DBP 200613338 | 27.7 ppb |
| 2021-04-15 | DBP 200613339 | 25.9 ppb |
| 2021-04-15 | DBP 200613340 | 31.9 ppb |
| 2021-04-15 | DBP 200613337 | 32.2 ppb |
| 2021-07-08 | DBP 200623691 | 28.1 ppb |
| 2021-07-08 | DBP 200623693 | 21.8 ppb |
| 2021-07-08 | DBP 200623708 | 24.4 ppb |
| 2021-07-08 | DBP 200623709 | 22.6 ppb |
| 2021-10-21 | B300086252 300086253 | 42.0 ppb |
| 2021-10-21 | B300086249 300086250 | 28.8 ppb |
| 2021-10-21 | B300086246 300086247 | 49.3 ppb |
| 2021-10-21 | B300086243 300086244 | 41.3 ppb |
| 2022-01-06 | D300128620 300128621 | 33.3 ppb |
| 2022-01-06 | D300128623 300128624 | 35.2 ppb |
| 2022-01-06 | D300128626 300128627 | 36.8 ppb |
| 2022-01-06 | D300128629 300128630 | 31.7 ppb |
| 2022-04-07 | D300167654 300167655 | 29.6 ppb |
| 2022-04-07 | D300167657 300167658 | 27.7 ppb |
| 2022-04-07 | D300167660 300167661 | 30.9 ppb |
| 2022-04-07 | D300167663 300167664 | 26.0 ppb |
| 2022-07-07 | D300209440 300209441 | 29.3 ppb |
| 2022-07-07 | D300209434 300209435 | 26.0 ppb |
| 2022-07-07 | D300209431 300209432 | 21.6 ppb |
| 2022-07-07 | D300209437 300209438 | 33.4 ppb |
| 2022-10-27 | D300264516 300264517 | 28.7 ppb |
| 2022-10-27 | D300264519 300264520 | 32.2 ppb |
| 2022-10-27 | D300264522 300264523 | 27.8 ppb |
| 2022-10-27 | D300264525 300264526 | 29.5 ppb |
| 2023-01-12 | D300297210 300297211 | 31.7 ppb |
| 2023-01-12 | D300297213 300297214 | 26.9 ppb |
| 2023-01-12 | D300297216 300297217 | 32.0 ppb |
| 2023-01-12 | D300297219 300297220 | 32.7 ppb |
| 2023-04-20 | D300336742 300336743 | 30.3 ppb |
| 2023-04-20 | D300336748 300336749 | 37.5 ppb |
| 2023-04-20 | D300336745 300336746 | 34.3 ppb |
| 2023-04-20 | D300336739 300336740 | 31.8 ppb |
| 2023-07-06 | D300377098 300377099 | 27.9 ppb |
| 2023-07-06 | D300377101 300377102 | 40.1 ppb |
| 2023-07-06 | D300377104 300377105 | 36.2 ppb |
| 2023-07-06 | D300377107 300377108 | 34.8 ppb |
| 2023-10-19 | D300433229 300433230 | 31.5 ppb |
| 2023-10-19 | D300433232 300433233 | 32.1 ppb |
| 2023-10-19 | D300433235 300433236 | 34.9 ppb |
| 2023-10-19 | D300433238 300433239 | 33.3 ppb |