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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Monroe Twp 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)

70

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.65 ppb1610ND - 6.50 ppb
20153.97 ppb16161.16 ppb - 6.09 ppb
20161.20 ppb167ND - 4.00 ppb
20170.669 ppb167ND - 2.20 ppb
20184.05 ppb1614ND - 9.40 ppb
20193.41 ppb16161.02 ppb - 9.49 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
2014-02-14L4899932-16.50 ppb
2014-02-14L4899932-2ND
2014-02-14L4899932-36.06 ppb
2014-02-14L4899932-41.46 ppb
2014-05-15L5015734-2ND
2014-05-15L5015734-31.84 ppb
2014-05-15L5015734-11.19 ppb
2014-05-15L5015734-42.67 ppb
2014-08-15L5157771-2ND
2014-08-15L5157771-3ND
2014-08-15L5157771-1ND
2014-08-15L5157771-4ND
2014-11-14L5284466-32.18 ppb
2014-11-14L5284466-21.78 ppb
2014-11-14L5284466-12.00 ppb
2014-11-14L5284466-40.780 ppb
2015-02-13L5406112-44.88 ppb
2015-02-13L5406112-21.61 ppb
2015-02-13L5406112-15.90 ppb
2015-02-13L5406112-36.09 ppb
2015-05-15L5537620-43.98 ppb
2015-05-15L5537620-13.96 ppb
2015-05-15L5537620-21.16 ppb
2015-05-15L5537620-34.30 ppb
2015-08-14L5706749-42.40 ppb
2015-08-14L5706749-15.71 ppb
2015-08-14L5706749-21.65 ppb
2015-08-14L5706749-35.24 ppb
2015-11-18L5861111-14.63 ppb
2015-11-18L5861111-44.44 ppb
2015-11-18L5861111-23.20 ppb
2015-11-18L5861111-34.40 ppb
2016-02-16L6015107-41.86 ppb
2016-02-16L6015107-13.76 ppb
2016-02-16L6015107-33.86 ppb
2016-02-16L6015107-21.78 ppb
2016-05-1634503474.00 ppb
2016-05-1634503492.80 ppb
2016-05-163450350ND
2016-05-163450348ND
2016-08-153523095ND
2016-08-153523096ND
2016-08-153523094ND
2016-08-163528143ND
2016-11-1535870421.20 ppb
2016-11-153587041ND
2016-11-153587044ND
2016-11-153587043ND
2017-02-1636406242.20 ppb
2017-02-1636406221.50 ppb
2017-02-1636406251.80 ppb
2017-02-1636406231.20 ppb
2017-05-163696985ND
2017-05-1636969841.40 ppb
2017-05-1636969821.40 ppb
2017-05-163696983ND
2017-08-153757731ND
2017-08-153757729ND
2017-08-153757730ND
2017-08-153757732ND
2017-11-153823009ND
2017-11-1538230111.20 ppb
2017-11-153823010ND
2017-11-153823008ND
2018-02-153802150752.39 ppb
2018-02-153802150694.71 ppb
2018-02-153802150715.65 ppb
2018-02-153802150732.73 ppb
2018-05-163805160742.51 ppb
2018-05-163805160763.88 ppb
2018-05-163805160807.56 ppb
2018-05-163805160781.07 ppb
2018-08-153808157213.20 ppb
2018-08-15380815719ND
2018-08-153808157234.54 ppb
2018-08-15380815717ND
2018-11-15381115713.28.96 ppb
2018-11-15381115714.24.61 ppb
2018-11-15381115711.23.63 ppb
2018-11-15381115712.29.40 ppb
2019-02-14390214702.21.96 ppb
2019-02-14390214705.22.93 ppb
2019-02-14390214703.24.84 ppb
2019-02-14390214704.22.11 ppb
2019-05-16390516720.22.30 ppb
2019-05-16390516719.23.03 ppb
2019-05-16390516721.25.35 ppb
2019-05-16390516718.29.20 ppb
2019-08-14390814709.21.45 ppb
2019-08-14390814710.21.02 ppb
2019-08-14390814707.29.49 ppb
2019-08-14390814708.22.45 ppb
2019-11-13391113701.22.05 ppb
2019-11-13391113703.22.58 ppb
2019-11-13391113702.22.00 ppb
2019-11-13391113700.21.86 ppb