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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Denville Twp Water Department

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)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.750 ppb161ND - 12.0 ppb
2015ND160ND
20160.494 ppb164ND - 2.03 ppb
2017ND160ND
20180.551 ppb162ND - 7.59 ppb
20191.16 ppb166ND - 9.23 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
2014-03-04340305029ND
2014-03-04340305027ND
2014-03-04340305031ND
2014-03-04340305033ND
2014-06-03340604008ND
2014-06-03340604012ND
2014-06-03340604010ND
2014-06-0334060401412.0 ppb
2014-09-02340903010ND
2014-09-02340903006ND
2014-09-02340903012ND
2014-09-02340903008ND
2014-12-02341202100ND
2014-12-02341202104ND
2014-12-02341202106ND
2014-12-02341202102ND
2015-03-03350303149ND
2015-03-03350303151ND
2015-03-03350303153ND
2015-03-03350303147ND
2015-06-02350602104ND
2015-06-02350602100ND
2015-06-02350602098ND
2015-06-02350602102ND
2015-09-01350901127ND
2015-09-01350901131ND
2015-09-01350901129ND
2015-09-01350901125ND
2015-12-01351201104ND
2015-12-01351201100ND
2015-12-01351201102ND
2015-12-01351201098ND
2016-03-01360301149ND
2016-03-013603011452.03 ppb
2016-03-01360301147ND
2016-03-01360301143ND
2016-06-013606010112.02 ppb
2016-06-013606010131.96 ppb
2016-06-01360601015ND
2016-06-01360601009ND
2016-09-01360901013ND
2016-09-013609010151.90 ppb
2016-09-01360901017ND
2016-09-01360901011ND
2016-12-01361201023ND
2016-12-01361201025ND
2016-12-01361201021ND
2016-12-01361201019ND
2017-03-01370301011ND
2017-03-01370301009ND
2017-03-01370301013ND
2017-03-01370301007ND
2017-06-01370601018ND
2017-06-01370601016ND
2017-06-01370601022ND
2017-06-01370601020ND
2017-09-01370901007ND
2017-09-01370901013ND
2017-09-01370901011ND
2017-09-01370901009ND
2017-12-01371201015ND
2017-12-01371201013ND
2017-12-01371201011ND
2017-12-01371201017ND
2018-03-02380302009ND
2018-03-02380302005ND
2018-03-02380302003ND
2018-03-02380302007ND
2018-06-04380604012ND
2018-06-04380604016ND
2018-06-04380604010ND
2018-06-04380604014ND
2018-09-04380904053ND
2018-09-04380904049ND
2018-09-04380904055ND
2018-09-043809040517.59 ppb
2018-12-033812030071.23 ppb
2018-12-03381203011ND
2018-12-03381203009ND
2018-12-03381203013ND
2019-03-053903051611.47 ppb
2019-03-05390305165ND
2019-03-053903051599.23 ppb
2019-03-05390305163ND
2019-06-04390604151ND
2019-06-04390604149ND
2019-06-043906041551.46 ppb
2019-06-04390604153ND
2019-09-04390904007.2AND
2019-09-04390904009.2A2.80 ppb
2019-09-04390904008.2AND
2019-09-04390904006.2A1.76 ppb
2019-12-043912040161.90 ppb
2019-12-04391204014ND
2019-12-04391204010ND
2019-12-04391204012ND