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Haloacetic acids (HAA5)

Forrest City Waterworks

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20101.10 ppb111.10 ppb
2011ND10ND
20121.20 ppb111.20 ppb
20131.36 ppb551.000 ppb - 2.20 ppb
20141.000 ppb126ND - 4.20 ppb
20152.00 ppb221.30 ppb - 2.70 ppb

ppb = parts per billion.

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 60 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

All test results

Date Lab ID Result
2010-06-29101810042011.10 ppb
2011-08-3111244001501ND
2012-08-27122420033011.20 ppb
2013-08-27132410009011.000 ppb
2013-11-26133310046011.30 ppb
2013-11-26133310048011.000 ppb
2013-11-26133310047012.20 ppb
2013-11-26133310049011.30 ppb
2014-03-1714079001101ND
2014-03-1714079001301ND
2014-03-17140790010011.000 ppb
2014-03-17140790012011.50 ppb
2014-06-2514177009001ND
2014-06-25141770088013.10 ppb
2014-06-25141770091011.10 ppb
2014-06-25141770089011.10 ppb
2014-08-2714240002901ND
2014-08-2714240003001ND
2014-08-27142400031014.20 ppb
2014-08-2714240002501ND
2015-04-08150990099011.30 ppb
2015-08-24152380008012.70 ppb