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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Beauregard Water Authority

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

 

86

Samples

0

Samples exceeding legal limit (MCL)

38

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.512 ppb1811ND - 3.09 ppb
20150.194 ppb145ND - 1.04 ppb
20160.112 ppb146ND - 0.318 ppb
20170.408 ppb148ND - 1.14 ppb
20180.593 ppb128ND - 1.72 ppb
20190.0541 ppb142ND - 0.469 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
2014-01-13AA88228ND
2014-01-14AA882320.528 ppb
2014-01-14AA882300.510 ppb
2014-01-14AA882310.379 ppb
2014-01-14AA88229ND
2014-04-16AA89108ND
2014-04-16AA89107ND
2014-04-16AA891110.779 ppb
2014-04-16AA891090.679 ppb
2014-04-16AA891100.623 ppb
2014-07-18AA906410.348 ppb
2014-07-18AA90638ND
2014-07-18AA90639ND
2014-07-18AA906400.324 ppb
2014-07-18AA906420.916 ppb
2014-10-14AA92136ND
2014-10-15AA921381.03 ppb
2014-10-15AA921373.09 ppb
2015-01-14AB02031ND
2015-01-14AB02030ND
2015-01-14AB020320.352 ppb
2015-04-14AB033020.418 ppb
2015-04-14AB03303ND
2015-04-14AB033010.418 ppb
2015-07-15AB060351.04 ppb
2015-07-15AB060360.494 ppb
2015-07-15AB06040ND
2015-10-13AB08338ND
2015-10-13AB08340ND
2015-10-13AB08337ND
2015-10-13AB08339ND
2015-10-13AB08336ND
2016-01-12AB09704ND
2016-01-12AB09705ND
2016-01-12AB09707ND
2016-01-12AB09708ND
2016-01-12AB097060.318 ppb
2016-04-13AB111130.221 ppb
2016-04-13AB11111ND
2016-04-13AB11112ND
2016-07-13AB13455ND
2016-07-13AB134540.209 ppb
2016-07-13AB134530.280 ppb
2016-10-12AB157850.273 ppb
2016-10-12AB157860.260 ppb
2016-10-13AB15784ND
2017-01-10AB171760.0770 ppb
2017-01-10AB171780.0710 ppb
2017-01-10AB17177ND
2017-04-11AB18598ND
2017-04-11AB185960.616 ppb
2017-04-11AB18597ND
2017-07-10AB20779ND
2017-07-10AB207821.07 ppb
2017-07-10AB207811.10 ppb
2017-07-10AB27831.14 ppb
2017-07-10AB20780ND
2017-10-13AB237041.01 ppb
2017-10-13AB237030.631 ppb
2017-10-13AB23705ND
2018-01-08AB249420.910 ppb
2018-01-08AB24944ND
2018-01-08AB249431.02 ppb
2018-04-11AB263281.30 ppb
2018-04-11AB263301.72 ppb
2018-04-11AB263291.09 ppb
2018-07-10AB282990.272 ppb
2018-07-10AB28300ND
2018-07-10AB28298ND
2018-10-09AB308290.539 ppb
2018-10-09AB308270.272 ppb
2018-10-09AB30828ND
2019-01-17AB32615ND
2019-01-17AB32618ND
2019-01-17AB32614ND
2019-01-17AB326160.288 ppb
2019-01-17AB326170.469 ppb
2019-04-10AB34083ND
2019-04-10AB34082ND
2019-04-10AB34084ND
2019-04-10AB34081ND
2019-10-17AB39414ND
2019-10-17AB39413ND
2019-10-17AB39412ND
2019-10-17AB39411ND
2019-10-17AB39410ND