Know Your Environment. Protect Your Health.

Haloacetic acids (HAA5)

Avon Water Company

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.

 

97

Samples

0

Samples exceeding legal limit (MCL)

79

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.56 ppb1614ND - 3.30 ppb
20191.39 ppb1615ND - 3.10 ppb
20201.51 ppb1615ND - 4.30 ppb
20211.98 ppb1715ND - 10.6 ppb
20221.32 ppb169ND - 5.90 ppb
20231.96 ppb1611ND - 4.80 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
2018-01-24D8A1669-02HA51.60 ppb
2018-01-24D8A1669-03HA52.30 ppb
2018-01-24D8A1669-04HA51.000 ppb
2018-01-24D8A1669-01HA52.20 ppb
2018-04-25D8D2151-09HA53.30 ppb
2018-04-25D8D2151-10HA52.00 ppb
2018-04-25D8D2151-11HA51.90 ppb
2018-04-25D8D2151-08HA5ND
2018-07-26CA98743ND
2018-07-26CA987442.80 ppb
2018-07-26CA987451.70 ppb
2018-07-26CA987462.30 ppb
2018-10-09DBP 2005086650.800 ppb
2018-10-09DBP 2005086781.10 ppb
2018-10-09DBP 2005086761.20 ppb
2018-10-09DBP 2005086640.800 ppb
2019-01-08DBP 2005181310.600 ppb
2019-01-08DBP 200518132ND
2019-01-08DBP 2005181330.500 ppb
2019-01-08DBP 2005181350.500 ppb
2019-04-11DBP 2005282670.900 ppb
2019-04-11DBP 2005282683.10 ppb
2019-04-11DBP 2005282691.20 ppb
2019-04-11DBP 2005282701.90 ppb
2019-07-02DBP 2005389932.90 ppb
2019-07-02DBP 2005389962.30 ppb
2019-07-02DBP 2005389951.80 ppb
2019-07-02DBP 2005389920.500 ppb
2019-10-03DBP 2005514302.00 ppb
2019-10-03DBP 2005514311.50 ppb
2019-10-03DBP 2005514322.10 ppb
2019-10-03DBP 2005514290.500 ppb
2020-01-09DBP 200562755ND
2020-01-09DBP 2005627561.30 ppb
2020-01-09DBP 2005627571.30 ppb
2020-01-09DBP 2005627581.000 ppb
2020-04-16DBP 2005729281.70 ppb
2020-04-16DBP 2005729292.30 ppb
2020-04-16DBP 2005729272.10 ppb
2020-04-16DBP 2005729260.600 ppb
2020-07-20DBP 2005834130.500 ppb
2020-07-20DBP 2005834143.40 ppb
2020-07-20DBP 2005834151.40 ppb
2020-07-20DBP 2005834162.60 ppb
2020-10-21DBP 2005950440.500 ppb
2020-10-21DBP 2005950454.30 ppb
2020-10-21DBP 2005950460.600 ppb
2020-10-21DBP 2005950470.600 ppb
2021-01-07DBP 2006034061.90 ppb
2021-01-07DBP 2006034021.40 ppb
2021-01-07DBP 2006034041.50 ppb
2021-01-07DBP 2006034051.70 ppb
2021-01-08DBP 20060340910.6 ppb
2021-04-15DBP 2006136520.600 ppb
2021-04-15DBP 2006136532.00 ppb
2021-04-15DBP 2006136541.90 ppb
2021-04-15DBP 2006136551.90 ppb
2021-07-01DBP 200623334ND
2021-07-01DBP 2006233350.500 ppb
2021-07-01DBP 2006233362.10 ppb
2021-07-01DBP 2006233382.10 ppb
2021-10-12H300079407 3000794331.93 ppb
2021-10-12H300079409 300079435ND
2021-10-12H300079408 3000794341.78 ppb
2021-10-12H300079406 3000794321.68 ppb
2022-01-14CK17779ND
2022-01-14CK17780ND
2022-01-14CK17781ND
2022-01-18CK17774ND
2022-04-15CL11166ND
2022-04-15CL111671.70 ppb
2022-04-15CL111681.70 ppb
2022-04-15CL111692.00 ppb
2022-07-08CL75309ND
2022-07-08CL753122.70 ppb
2022-07-08CL753105.90 ppb
2022-07-08CL753112.90 ppb
2022-10-21CM692481.30 ppb
2022-10-21CM692491.80 ppb
2022-10-21CM692501.10 ppb
2022-10-21CM69251ND
2023-01-11CN21964ND
2023-01-12CN241882.60 ppb
2023-01-12CN241893.10 ppb
2023-01-12CN241901.20 ppb
2023-04-14CN858631.40 ppb
2023-04-14CN858652.70 ppb
2023-04-14CN858644.60 ppb
2023-04-14CN85862ND
2023-07-13CO53041ND
2023-07-13CO530422.90 ppb
2023-07-13CO530434.80 ppb
2023-07-25CO588554.40 ppb
2023-10-04CP17807ND
2023-10-04CP178082.00 ppb
2023-10-04CP178091.60 ppb
2023-10-04CP17810ND