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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Waynesville

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

 

104

Samples

0

Samples exceeding legal limit (MCL)

104

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
201415.8 ppb242410.8 ppb - 22.0 ppb
201521.3 ppb161616.0 ppb - 28.0 ppb
201615.9 ppb161610.00 ppb - 19.0 ppb
201726.4 ppb161619.0 ppb - 38.0 ppb
201822.1 ppb161617.0 ppb - 28.0 ppb
201916.8 ppb161610.00 ppb - 22.0 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
2014-01-0992186030001-215.0 ppb
2014-01-0992186030002-216.0 ppb
2014-01-0992186030003-220.0 ppb
2014-01-0992186030004-220.0 ppb
2014-04-0992196762001TTH-216.0 ppb
2014-04-0992196762002TTH-214.0 ppb
2014-04-0992196762003TTH-218.0 ppb
2014-04-0992196762004TTH-216.0 ppb
2014-04-0992196762001DIS-215.6 ppb
2014-04-0992196762002DIS-214.3 ppb
2014-04-0992196762003DIS-217.8 ppb
2014-04-0992196762004DIS-216.5 ppb
2014-07-1492209273001DIS22.0 ppb
2014-07-1492209273002DIS12.0 ppb
2014-07-1492209273003DIS11.0 ppb
2014-07-1492209273004DIS10.8 ppb
2014-07-1492209273001TTH21.0 ppb
2014-07-1492209273002TTH12.0 ppb
2014-07-1492209273003TTH11.0 ppb
2014-07-1492209273004TTH11.0 ppb
2014-10-1592221743001TTH-219.0 ppb
2014-10-1592221743002TTH-217.0 ppb
2014-10-1592221743003TTH-217.0 ppb
2014-10-1592221743004TTH-216.0 ppb
2015-01-1425.0 ppb
2015-01-1421.0 ppb
2015-01-1419.0 ppb
2015-01-1423.0 ppb
2015-04-1420.0 ppb
2015-04-1420.0 ppb
2015-04-1419.0 ppb
2015-04-1419.0 ppb
2015-07-2222.0 ppb
2015-07-2226.0 ppb
2015-07-2224.0 ppb
2015-07-2220.0 ppb
2015-10-1428.0 ppb
2015-10-1416.0 ppb
2015-10-1419.0 ppb
2015-10-1419.0 ppb
2016-01-1937729_16-0228411.0 ppb
2016-01-1937729_16-0228515.0 ppb
2016-01-1937729_16-0228610.00 ppb
2016-01-1937729_16-0228713.0 ppb
2016-04-1237729_16-1162316.0 ppb
2016-04-1237729_16-1162416.0 ppb
2016-04-1237729_16-1162517.0 ppb
2016-04-1237729_16-1162618.0 ppb
2016-07-1237729_16-2325419.0 ppb
2016-07-1237729_16-2327516.0 ppb
2016-07-1237729_16-2327617.0 ppb
2016-07-1237729_16-2327714.0 ppb
2016-10-0337729_16-3497519.0 ppb
2016-10-0337729_16-3497617.0 ppb
2016-10-0337729_16-3497718.0 ppb
2016-10-0337729_16-3497818.0 ppb
2017-01-1137729_17-0125425.0 ppb
2017-01-1137729_17-0125527.0 ppb
2017-01-1137729_17-0125627.0 ppb
2017-01-1137729_17-0125731.0 ppb
2017-04-1137729_17-1208424.0 ppb
2017-04-1137729_17-1208523.0 ppb
2017-04-1137729_17-1208626.0 ppb
2017-04-1137729_17-1208726.0 ppb
2017-07-1937729_17-2549826.0 ppb
2017-07-1937729_17-2549919.0 ppb
2017-07-1937729_17-2550019.0 ppb
2017-07-1937729_17-2550124.0 ppb
2017-10-1637729_17-3919036.0 ppb
2017-10-1637729_17-3919238.0 ppb
2017-10-1637729_17-3919325.0 ppb
2017-10-1637729_17-3919426.0 ppb
2018-02-0637729_18-04624 22.0 ppb
2018-02-0637729_18-04625 20.0 ppb
2018-02-0637729_18-04626 23.0 ppb
2018-02-0637729_18-04627 19.0 ppb
2018-04-1037729_18-14164 23.0 ppb
2018-04-1037729_18-14167 22.0 ppb
2018-04-1037729_18-14168 24.0 ppb
2018-04-1037729_18-14169 23.0 ppb
2018-07-1037729_18-28200 19.0 ppb
2018-07-1037729_18-28203 22.0 ppb
2018-07-1037729_18-28204 17.0 ppb
2018-07-1037729_18-28205 25.0 ppb
2018-10-0237729_18-40791 24.0 ppb
2018-10-0237729_18-40793 17.0 ppb
2018-10-0237729_18-40794 26.0 ppb
2018-10-0237729_18-40795 28.0 ppb
2019-01-0837729_19-01136 18.0 ppb
2019-01-0837729_19-01137 21.0 ppb
2019-01-0837729_19-01138 13.0 ppb
2019-01-0837729_19-01139 20.0 ppb
2019-04-1037729_19-15101 17.0 ppb
2019-04-1037729_19-15102 16.0 ppb
2019-04-1037729_19-15103 20.0 ppb
2019-04-1037729_19-15104 14.0 ppb
2019-07-1037729_19-29050 10.00 ppb
2019-07-1037729_19-29053 20.0 ppb
2019-07-1037729_19-29054 10.00 ppb
2019-07-1037729_19-29055 22.0 ppb
2019-10-1637729_19-44927 14.0 ppb
2019-10-1637729_19-44928 20.0 ppb
2019-10-1637729_19-44929 15.0 ppb
2019-10-1637729_19-44930 18.0 ppb