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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Hamilton Township MUA

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)

66

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.29 ppb1613ND - 6.20 ppb
20152.60 ppb16161.76 ppb - 4.89 ppb
20161.21 ppb168ND - 4.58 ppb
20174.04 ppb1611ND - 29.0 ppb
20181.33 ppb1611ND - 4.00 ppb
20190.731 ppb167ND - 3.20 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
2014-02-14L4900037-11.39 ppb
2014-02-14L4900037-25.60 ppb
2014-02-14L4900037-42.62 ppb
2014-02-14L4900037-3ND
2014-05-14L5015886-24.30 ppb
2014-05-14L5015886-42.92 ppb
2014-05-14L5015886-12.54 ppb
2014-05-14L5015886-3ND
2014-08-15L5158156-22.06 ppb
2014-08-15L5158156-41.03 ppb
2014-08-15L5158156-3ND
2014-08-19L5158156-51.54 ppb
2014-11-14L5284576-41.84 ppb
2014-11-14L5284576-26.20 ppb
2014-11-14L5284576-12.67 ppb
2014-11-14L5284576-31.97 ppb
2015-02-13L5406237-31.76 ppb
2015-02-13L5406237-24.89 ppb
2015-02-13L5406237-12.87 ppb
2015-02-13L5406237-41.84 ppb
2015-05-15L5537795-32.40 ppb
2015-05-15L5537795-13.90 ppb
2015-05-15L5537795-22.23 ppb
2015-05-15L5537795-42.28 ppb
2015-08-14L5707119-33.25 ppb
2015-08-14L5707119-13.08 ppb
2015-08-14L5707119-21.87 ppb
2015-08-14L5707119-42.37 ppb
2015-11-13L5861218-12.32 ppb
2015-11-13L5861218-32.52 ppb
2015-11-13L5861218-22.21 ppb
2015-11-13L5861218-41.84 ppb
2016-02-11L6015208-32.70 ppb
2016-02-11L6015208-14.58 ppb
2016-02-11L6015208-43.27 ppb
2016-02-11L6015208-22.05 ppb
2016-05-1634503401.60 ppb
2016-05-163450343ND
2016-05-163450342ND
2016-05-163450341ND
2016-08-1235213502.40 ppb
2016-08-123521353ND
2016-08-123521352ND
2016-08-1235213511.000 ppb
2016-11-143587410ND
2016-11-1435874091.70 ppb
2016-11-143587411ND
2016-11-143587412ND
2017-02-143638076ND
2017-02-143638073ND
2017-02-143638075ND
2017-02-1436380741.40 ppb
2017-05-123694364ND
2017-05-1236943652.50 ppb
2017-05-1236943621.30 ppb
2017-05-1236943632.50 ppb
2017-08-1437580451.10 ppb
2017-08-1437580421.90 ppb
2017-08-1437580432.60 ppb
2017-08-1437580441.000 ppb
2017-11-14382301729.0 ppb
2017-11-143823018ND
2017-11-14382301920.0 ppb
2017-11-1438230161.40 ppb
2018-02-143872409ND
2018-02-1438724074.00 ppb
2018-02-1438724081.10 ppb
2018-02-143872410ND
2018-05-1439436011.10 ppb
2018-05-1439435991.30 ppb
2018-05-1439436022.60 ppb
2018-05-1439436002.50 ppb
2018-08-3040429281.10 ppb
2018-08-3040429262.70 ppb
2018-08-3040429271.000 ppb
2018-08-3040429252.60 ppb
2018-11-144122299ND
2018-11-144122297ND
2018-11-144122298ND
2018-11-1441222961.20 ppb
2019-02-144198782ND
2019-02-144198784ND
2019-02-1441987831.30 ppb
2019-02-144198785ND
2019-05-144293596ND
2019-05-144293597ND
2019-05-1442935941.10 ppb
2019-05-144293595ND
2019-08-1443879451.40 ppb
2019-08-1443879431.000 ppb
2019-08-1443879441.10 ppb
2019-08-1443879462.60 ppb
2019-11-144487754ND
2019-11-1444877553.20 ppb
2019-11-144487757ND
2019-11-144487756ND