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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Eden

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

 

100

Samples

0

Samples exceeding legal limit (MCL)

100

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
201417.4 ppb20208.60 ppb - 25.0 ppb
201521.6 ppb161612.0 ppb - 32.0 ppb
201622.6 ppb161611.0 ppb - 38.0 ppb
201724.3 ppb161614.0 ppb - 37.0 ppb
201820.6 ppb161610.00 ppb - 42.0 ppb
201918.7 ppb16167.20 ppb - 34.0 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
2014-02-0392188333002-29.20 ppb
2014-02-0392188333001-29.00 ppb
2014-02-0392188333004-28.60 ppb
2014-02-0392188333003-213.0 ppb
2014-05-0192199448001TTH-215.0 ppb
2014-05-0192199448002TTH-214.0 ppb
2014-05-0192199448003TTH-218.0 ppb
2014-05-0192199448004TTH-215.0 ppb
2014-05-0192199448001DIS-215.1 ppb
2014-05-0192199448002DIS-213.9 ppb
2014-05-0192199448003DIS-220.0 ppb
2014-05-0192199448004DIS-215.3 ppb
2014-08-0592211903002TTH-225.0 ppb
2014-08-0592211903004TTH-224.0 ppb
2014-08-0592211903003TTH-219.0 ppb
2014-08-0592211903001TTH-224.0 ppb
2014-11-0492223894001TTH-221.0 ppb
2014-11-0492223894002TTH-222.0 ppb
2014-11-0492223894003TTH-224.0 ppb
2014-11-0492223894004TTH-223.0 ppb
2015-02-0213.0 ppb
2015-02-0212.0 ppb
2015-02-0212.0 ppb
2015-02-0212.0 ppb
2015-05-0422.0 ppb
2015-05-0420.0 ppb
2015-05-0420.0 ppb
2015-05-0421.0 ppb
2015-08-0430.0 ppb
2015-08-0432.0 ppb
2015-08-0429.0 ppb
2015-08-0431.0 ppb
2015-11-0322.0 ppb
2015-11-0323.0 ppb
2015-11-0322.0 ppb
2015-11-0324.0 ppb
2016-02-0292284970002TTH-211.0 ppb
2016-02-0292284970004TTH-212.0 ppb
2016-02-0292284970003TTH-213.0 ppb
2016-02-0292284970001TTH-211.0 ppb
2016-05-0392295997001TTH-226.0 ppb
2016-05-0392295997002TTH-225.0 ppb
2016-05-0392295997003TTH-218.0 ppb
2016-05-0392295997004TTH-217.0 ppb
2016-08-0492307615001TTH-237.0 ppb
2016-08-0492307615002TTH-238.0 ppb
2016-08-0492307615003TTH-229.0 ppb
2016-08-0492307615004TTH-238.0 ppb
2016-11-0292318131004TTH-228.0 ppb
2016-11-0292318131003TTH-219.0 ppb
2016-11-0292318131001TTH-221.0 ppb
2016-11-0292318131002TTH-219.0 ppb
2017-02-0192328280001TTH14.0 ppb
2017-02-0192328280002TTH14.0 ppb
2017-02-0192328280003TTH19.0 ppb
2017-02-0192328280004TTH17.0 ppb
2017-05-0392339176001TTH23.0 ppb
2017-05-0392339176002TTH23.0 ppb
2017-05-0392339176003TTH18.0 ppb
2017-05-0392339176004TTH23.0 ppb
2017-08-0292349789002TTH37.0 ppb
2017-08-0292349789004TTH35.0 ppb
2017-08-0292349789003TTH33.0 ppb
2017-08-0292349789001TTH35.0 ppb
2017-11-0192361492001TTH23.0 ppb
2017-11-0192361492002TTH24.0 ppb
2017-11-0192361492003TTH26.0 ppb
2017-11-0192361492004TTH25.0 ppb
2018-02-0692372084004TTH 11.0 ppb
2018-02-0692372084003TTH 10.00 ppb
2018-02-0692372084002TTH 10.00 ppb
2018-02-0692372084001TTH 10.00 ppb
2018-05-0292383118004TTH 18.0 ppb
2018-05-0292383118001TTH 18.0 ppb
2018-05-0292383118002TTH 17.0 ppb
2018-05-0292383118003TTH 18.0 ppb
2018-08-0792394678004TTH 35.0 ppb
2018-08-0792394678003TTH 33.0 ppb
2018-08-0792394678002TTH 34.0 ppb
2018-08-2392396866001TTH 42.0 ppb
2018-11-0192405596001TTH 18.0 ppb
2018-11-0192405596002TTH 18.0 ppb
2018-11-0192405596003TTH 21.0 ppb
2018-11-0192405596004TTH 16.0 ppb
2019-02-0492416286001_37708.00 ppb
2019-02-0492416286002_37707.20 ppb
2019-02-0492416286003_37707.90 ppb
2019-02-0492416286004_37708.10 ppb
2019-05-0192427509001_377013.2 ppb
2019-05-0192427509004_377013.2 ppb
2019-05-0192427509003_377012.9 ppb
2019-05-0192427509002_377020.0 ppb
2019-08-0192439513002_377031.0 ppb
2019-08-0192439513004_377031.0 ppb
2019-08-0192439513003_377034.0 ppb
2019-08-0192439513001_377032.0 ppb
2019-11-0492452118004_377028.0 ppb
2019-11-0492452118003_377017.2 ppb
2019-11-0492452118002_377017.1 ppb
2019-11-0492452118001_377017.6 ppb