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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Haysville

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)

48

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.86 ppb168ND - 8.90 ppb
20152.17 ppb1611ND - 5.50 ppb
20162.16 ppb169ND - 5.60 ppb
20171.28 ppb166ND - 4.40 ppb
20182.21 ppb167ND - 7.70 ppb
20191.78 ppb167ND - 7.10 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
2014-03-11766482.00 ppb
2014-03-11766472.30 ppb
2014-03-1176646ND
2014-03-1176645ND
2014-06-101268874.10 ppb
2014-06-101268863.10 ppb
2014-06-10126852ND
2014-06-101268518.90 ppb
2014-09-09191462ND
2014-09-091914602.30 ppb
2014-09-091914683.60 ppb
2014-09-091914703.40 ppb
2014-12-08243939ND
2014-12-08243938ND
2014-12-08243937ND
2014-12-08243936ND
2015-03-162967542.20 ppb
2015-03-162967532.80 ppb
2015-03-16296752ND
2015-03-16296751ND
2015-06-15349017ND
2015-06-153490185.50 ppb
2015-06-153490203.50 ppb
2015-06-153490193.50 ppb
2015-09-14405796ND
2015-09-144057953.10 ppb
2015-09-144057943.50 ppb
2015-09-144057933.10 ppb
2015-12-14461218ND
2015-12-144612172.70 ppb
2015-12-144612162.20 ppb
2015-12-144612152.60 ppb
2016-03-07506793ND
2016-03-07506792ND
2016-03-07506794ND
2016-03-07506795ND
2016-06-065592942.30 ppb
2016-06-065592932.40 ppb
2016-06-065592923.60 ppb
2016-06-06559291ND
2016-09-126215044.80 ppb
2016-09-126215035.60 ppb
2016-09-126215024.70 ppb
2016-09-12621501ND
2016-12-06668538ND
2016-12-066685413.30 ppb
2016-12-066685403.10 ppb
2016-12-066685394.80 ppb
2017-03-137232832.20 ppb
2017-03-13723282ND
2017-03-13723281ND
2017-03-13723280ND
2017-06-127766893.10 ppb
2017-06-12776688ND
2017-06-12776687ND
2017-06-12776686ND
2017-09-18842345ND
2017-09-188423443.50 ppb
2017-09-18842346ND
2017-09-188423474.00 ppb
2017-12-11891687ND
2017-12-118916864.40 ppb
2017-12-11891685ND
2017-12-118916843.20 ppb
2018-03-129361743.40 ppb
2018-03-12936173ND
2018-03-12936172ND
2018-03-129361717.50 ppb
2018-06-11986704ND
2018-06-119867056.00 ppb
2018-06-11986707ND
2018-06-119867064.80 ppb
2018-09-171044630ND
2018-09-1710446297.70 ppb
2018-09-1710446283.50 ppb
2018-09-171044627ND
2018-12-101089162ND
2018-12-1010891612.40 ppb
2018-12-101089160ND
2018-12-101089159ND
2019-03-181139297ND
2019-03-181139296ND
2019-03-181139298ND
2019-03-1811392992.90 ppb
2019-06-101184526ND
2019-06-101184525ND
2019-06-1011845244.20 ppb
2019-06-1011845232.70 ppb
2019-09-1712430155.10 ppb
2019-09-171243014ND
2019-09-1712430137.10 ppb
2019-09-171243012ND
2019-12-0212815753.10 ppb
2019-12-021281579ND
2019-12-021281578ND
2019-12-0212815763.40 ppb