Know Your Environment. Protect Your Health.

Haloacetic acids (HAA5)

City of Sansom Park

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

33

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201810.9 ppb87ND - 29.2 ppb
201911.2 ppb86ND - 28.0 ppb
20203.64 ppb84ND - 12.0 ppb
20212.51 ppb85ND - 10.3 ppb
20222.55 ppb84ND - 7.00 ppb
20234.63 ppb87ND - 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
2018-02-07Q1805498002ND
2018-02-07Q18054980013.90 ppb
2018-05-22Q18207290026.30 ppb
2018-05-22Q182072900129.2 ppb
2018-09-12Q183653900112.0 ppb
2018-09-12Q18365390025.40 ppb
2018-11-08Q184478000123.2 ppb
2018-11-08Q18447800026.90 ppb
2019-02-06Q190549600128.0 ppb
2019-02-06Q190549600215.3 ppb
2019-05-02Q191814601618.6 ppb
2019-05-02Q19181460174.30 ppb
2019-09-13Q1965277002ND
2019-09-13Q19652770019.30 ppb
2019-11-18Q197712500113.7 ppb
2019-11-18Q1977125002ND
2020-01-21Q20022790346.00 ppb
2020-01-21Q2002279035ND
2020-05-21Q20204440012.10 ppb
2020-05-21Q2020444002ND
2020-09-01Q20348330179.00 ppb
2020-09-01Q2034833018ND
2020-10-28Q204161700112.0 ppb
2020-10-28Q2041617002ND
2021-03-09Q21061210191.80 ppb
2021-03-09Q2106121020ND
2021-04-28Q21107420012.00 ppb
2021-04-28Q2110742002ND
2021-08-03Q21201840014.60 ppb
2021-08-03Q21201840021.40 ppb
2021-11-15Q213178200610.3 ppb
2021-11-15Q2131782007ND
2022-03-14Q2208529009ND
2022-03-14Q22085290103.60 ppb
2022-05-05Q22136160084.30 ppb
2022-05-05Q2213616009ND
2022-08-01Q22218910015.50 ppb
2022-08-01Q2221891002ND
2022-10-13Q22310740167.00 ppb
2022-10-13Q2231074027ND
2023-01-18Q2302599001ND
2023-01-18Q23025990021.30 ppb
2023-04-13Q231371300912.2 ppb
2023-04-13Q23137130104.20 ppb
2023-08-15Q233408703711.2 ppb
2023-08-15Q23340870382.70 ppb
2023-12-01Q23516370011.60 ppb
2023-12-01Q23516370023.80 ppb