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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

The Landings Subdivision

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.

MORE ABOUT THIS CONTAMINANT

 

96

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
20160.469 ppb164ND - 2.20 ppb
2017ND160ND
20180.913 ppb161ND - 14.6 ppb
2019ND160ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2014-02-17AI28210ND
2014-02-17AI28209ND
2014-02-17AI28208ND
2014-02-17AI28207ND
2014-05-15AI40653ND
2014-05-15AI40652ND
2014-05-15AI40651ND
2014-05-15AI40650ND
2014-08-11AI49139ND
2014-08-11AI49138ND
2014-08-11AI49140ND
2014-08-11AI49141ND
2014-11-17AI59648ND
2014-11-17AI59647ND
2014-11-17AI59646ND
2014-11-17AI59645ND
2015-02-10AI64880ND
2015-02-10AI64879ND
2015-02-10AI64878ND
2015-02-10AI64877ND
2015-05-12AI76980ND
2015-05-12AI76981ND
2015-05-12AI76983ND
2015-05-12AI76982ND
2015-08-12AI86242ND
2015-08-12AI86241ND
2015-08-12AI86240ND
2015-08-12AI86239ND
2015-12-08AJ02256ND
2015-12-08AJ02255ND
2015-12-08AJ02254ND
2015-12-08AJ02253ND
2016-02-09AJ06164ND
2016-02-09AJ06163ND
2016-02-09AJ06165ND
2016-02-09AJ06166ND
2016-05-11AJ12061ND
2016-05-11AJ12060ND
2016-05-11AJ12059ND
2016-05-11AJ12058ND
2016-08-11AJ22474ND
2016-08-11AJ22473ND
2016-08-11AJ22472ND
2016-08-11AJ22471ND
2016-11-07AJ327791.70 ppb
2016-11-07AJ327822.00 ppb
2016-11-07AJ327812.20 ppb
2016-11-07AJ327801.60 ppb
2017-02-07AJ45930ND
2017-02-07AJ45929ND
2017-02-07AJ45928ND
2017-02-07AJ45927ND
2017-05-15AJ55431ND
2017-05-15AJ55430ND
2017-05-15AJ55429ND
2017-05-15AJ55428ND
2017-08-09AJ63578ND
2017-08-09AJ63577ND
2017-08-09AJ63579ND
2017-08-09AJ63580ND
2017-11-06AJ73339ND
2017-11-06AJ73338ND
2017-11-06AJ73337ND
2017-11-06AJ73336ND
2018-02-12AJ83657ND
2018-02-12AJ83656ND
2018-02-12AJ83655ND
2018-02-12AJ83654ND
2018-06-21AJ92226ND
2018-06-21AJ92227ND
2018-06-21AJ92229ND
2018-06-21AJ92228ND
2018-08-20AJ98286ND
2018-08-20AJ98285ND
2018-08-20AJ98284ND
2018-08-20AJ98283ND
2018-11-14AK06118ND
2018-11-14AK06117ND
2018-11-14AK06116ND
2018-11-14AK0611514.6 ppb
2019-02-12AK11136ND
2019-02-12AK11135ND
2019-02-12AK11137ND
2019-02-12AK11138ND
2019-05-08AK16866ND
2019-05-08AK16865ND
2019-05-08AK16864ND
2019-05-08AK16863ND
2019-08-12AK25690ND
2019-08-12AK25689ND
2019-08-12AK25688ND
2019-08-12AK25687ND
2019-11-13AK36665ND
2019-11-13AK36668ND
2019-11-13AK36667ND
2019-11-13AK36666ND