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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Medford Twp Department of Muni

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

 

83

Samples

0

Samples exceeding legal limit (MCL)

26

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.817 ppb126ND - 5.50 ppb
20151.16 ppb1211ND - 2.50 ppb
2016ND120ND
20170.333 ppb151ND - 5.00 ppb
20181.52 ppb166ND - 10.6 ppb
20190.956 ppb162ND - 12.1 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
2014-03-31L5006573-3ND
2014-03-31L5006573-1ND
2014-03-31L5006573-2ND
2014-03-31L5006573-4ND
2014-06-30L5057738-4ND
2014-06-30L5057738-3ND
2014-06-30L5057738-22.60 ppb
2014-06-30L5057738-15.50 ppb
2014-12-30L5322042-30.430 ppb
2014-12-30L5322042-50.440 ppb
2014-12-30L5322042-10.410 ppb
2014-12-30L5322042-20.420 ppb
2015-03-30L5526947-2ND
2015-03-30L5526947-30.480 ppb
2015-03-30L5526947-10.530 ppb
2015-03-30L5526947-40.300 ppb
2015-09-30L5771399-20.780 ppb
2015-09-30L5771399-30.990 ppb
2015-09-30L5771399-41.000 ppb
2015-09-30L5771399-10.420 ppb
2015-12-23L5915487-42.50 ppb
2015-12-23L5915487-32.40 ppb
2015-12-23L5915487-22.20 ppb
2015-12-23L5915487-12.30 ppb
2016-06-303487122ND
2016-06-303487123ND
2016-06-303487124ND
2016-06-303487125ND
2016-09-293557762ND
2016-09-293557763ND
2016-09-293557760ND
2016-09-293557761ND
2016-12-023598977ND
2016-12-023598979ND
2016-12-023598980ND
2016-12-023598978ND
2017-03-093654062ND
2017-03-093654063ND
2017-03-0936540615.00 ppb
2017-06-013706974ND
2017-06-013706972ND
2017-06-013706975ND
2017-06-093712358ND
2017-09-213785976ND
2017-09-213785974ND
2017-09-213785977ND
2017-09-213785975ND
2017-12-283847490ND
2017-12-283847488ND
2017-12-283847491ND
2017-12-283847489ND
2018-03-1638933511.80 ppb
2018-03-1638933521.80 ppb
2018-03-1638933501.70 ppb
2018-03-2338971303.30 ppb
2018-06-293977721ND
2018-06-293977720ND
2018-06-293977719ND
2018-06-293977718ND
2018-09-284076052ND
2018-09-2840760515.10 ppb
2018-09-284076053ND
2018-09-28407605010.6 ppb
2018-12-284164248ND
2018-12-284164249ND
2018-12-284164251ND
2018-12-284164250ND
2019-02-154201481ND
2019-02-154201479ND
2019-02-154201480ND
2019-02-154201482ND
2019-05-314317624ND
2019-05-314317627ND
2019-05-314317625ND
2019-05-314317626ND
2019-09-274441935ND
2019-09-274441932ND
2019-09-274441933ND
2019-09-274441934ND
2019-12-27453063512.1 ppb
2019-12-2745306363.20 ppb
2019-12-274530638ND
2019-12-274530637ND