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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Garden City

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)

21

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.01 ppb164ND - 5.50 ppb
20150.850 ppb165ND - 3.30 ppb
20160.163 ppb161ND - 2.60 ppb
20171.23 ppb167ND - 4.90 ppb
2018ND160ND
20190.563 ppb164ND - 2.40 ppb

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
2014-02-1060032ND
2014-02-1060026ND
2014-02-1060015ND
2014-02-1060011ND
2014-05-05109964ND
2014-05-05109963ND
2014-05-05109962ND
2014-05-05109961ND
2014-08-04166941ND
2014-08-04166940ND
2014-08-04166942ND
2014-08-04166943ND
2014-11-132346795.50 ppb
2014-11-132346783.00 ppb
2014-11-132346773.30 ppb
2014-11-132346764.40 ppb
2015-02-02271203ND
2015-02-02271202ND
2015-02-02271201ND
2015-02-02271200ND
2015-05-04329104ND
2015-05-04329105ND
2015-05-04329107ND
2015-05-043291062.60 ppb
2015-08-043791813.30 ppb
2015-08-043791802.40 ppb
2015-08-04379179ND
2015-08-04379178ND
2015-11-02428111ND
2015-11-024281103.30 ppb
2015-11-02428109ND
2015-11-024281082.00 ppb
2016-02-08490848ND
2016-02-08490847ND
2016-02-08490849ND
2016-02-08490850ND
2016-05-23551388ND
2016-05-23551387ND
2016-05-23551386ND
2016-05-23551385ND
2016-08-096009372.60 ppb
2016-08-09600936ND
2016-08-09600935ND
2016-08-09600934ND
2016-11-07656798ND
2016-11-07656801ND
2016-11-07656800ND
2016-11-07656799ND
2017-02-12708456ND
2017-02-13708459ND
2017-02-13708458ND
2017-02-13708457ND
2017-05-167629503.50 ppb
2017-05-167629492.00 ppb
2017-05-16762948ND
2017-05-167629470.830 ppb
2017-08-148197813.50 ppb
2017-08-14819789ND
2017-08-148197912.90 ppb
2017-08-21823976ND
2017-11-138781432.00 ppb
2017-11-13878142ND
2017-11-138781414.90 ppb
2017-11-13878140ND
2018-02-05908262ND
2018-02-05908261ND
2018-02-05908260ND
2018-02-05908259ND
2018-05-14970948ND
2018-05-14970949ND
2018-05-14970951ND
2018-05-14970950ND
2018-08-271032603ND
2018-08-271032602ND
2018-08-271032601ND
2018-08-271032600ND
2018-11-061074408ND
2018-11-061074407ND
2018-11-061074405ND
2018-11-061074404ND
2019-02-1111202092.00 ppb
2019-02-111120208ND
2019-02-111120210ND
2019-02-111120211ND
2019-05-061157871ND
2019-05-061157870ND
2019-05-061157869ND
2019-05-061157868ND
2019-08-121222414ND
2019-08-1212224132.40 ppb
2019-08-1212224122.20 ppb
2019-08-1212224112.40 ppb
2019-11-121274217ND
2019-11-121274220ND
2019-11-121274219ND
2019-11-121274218ND