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EWG's Tap Water Database — 2019 UPDATE

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Haloacetic acids (HAA5)

Juneau

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.

 

82

Samples

0

Samples exceeding legal limit (MCL)

38

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20125.80 ppb87ND - 14.0 ppb
20134.60 ppb106ND - 10.00 ppb
20142.99 ppb1610ND - 9.00 ppb
20152.01 ppb164ND - 10.9 ppb
20161.30 ppb163ND - 8.70 ppb
20172.15 ppb168ND - 6.90 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 on-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
2012-02-07DB*2012021100863.50 ppb
2012-02-07DB*201202110085ND
2012-05-29DB*2012053102484.40 ppb
2012-05-29DB*2012053102495.40 ppb
2012-08-20DB*2012082403333.00 ppb
2012-08-20DB*20120824033414.0 ppb
2012-10-30DT*2012110201465.10 ppb
2012-10-30DT*20121102014711.0 ppb
2013-01-28DB*2013020509084.40 ppb
2013-01-28DB*2013020509079.50 ppb
2013-04-09DB*201304130210ND
2013-04-09DB*2013041302128.70 ppb
2013-07-09DB*20130712031110.00 ppb
2013-07-09DB*201307120312ND
2013-10-14DB*201310160316ND
2013-10-14DB*201310160317ND
2013-10-14DB*2013101603184.90 ppb
2013-10-14DB*2013101603198.50 ppb
2014-01-06DB*2014011100398.00 ppb
2014-01-06DB*2014011100414.40 ppb
2014-01-06DB*2014011100422.00 ppb
2014-01-06DB*201401110043ND
2014-04-01DB*201404030460ND
2014-04-01DB*201404030464ND
2014-04-01DB*201404030463ND
2014-04-01DB*2014040304628.30 ppb
2014-07-07H2*3059544ND
2014-07-07H2*30595431.000 ppb
2014-07-07H2*30595429.00 ppb
2014-07-07H2*3059541ND
2014-10-06DH*31203954.00 ppb
2014-10-06DH*31204011.40 ppb
2014-10-06DH*31203991.70 ppb
2014-10-06DH*31203978.10 ppb
2015-01-12DH*3172556ND
2015-01-12DH*31725575.70 ppb
2015-01-12DH*3172558ND
2015-01-12DH*3172559ND
2015-04-06DH*3219948ND
2015-04-06DH*3219946ND
2015-04-06DH*3219942ND
2015-04-06DH*32199448.70 ppb
2015-07-06DH*3275769ND
2015-07-06DH*327577010.9 ppb
2015-07-06DH*3275771ND
2015-07-06DH*3275772ND
2015-10-05DH*3336172ND
2015-10-05DH*3336171ND
2015-10-05DH*3336170ND
2015-10-05DH*33361696.80 ppb
2016-01-04DH*3382669ND
2016-01-04DH*3382670ND
2016-01-04DH*3382671ND
2016-01-04DH*3382672ND
2016-04-04DH*3426419ND
2016-04-04DH*3426418ND
2016-04-04DH*3426417ND
2016-04-04DH*3426416ND
2016-07-18DH*3499728ND
2016-07-18DH*34997298.70 ppb
2016-07-18DH*3499730ND
2016-07-18DH*3499731ND
2016-10-03DB*3559108ND
2016-10-03DB*35591077.00 ppb
2016-10-03DB*35591065.10 ppb
2016-10-03DB*3559109ND
2017-01-09DH*3619065ND
2017-01-09DH*36190665.90 ppb
2017-01-09DH*3619067ND
2017-01-09DH*3619068ND
2017-04-03DH*3667838ND
2017-04-03DH*3667841ND
2017-04-03DH*3667840ND
2017-04-03DH*36678396.20 ppb
2017-07-03DH*37268282.40 ppb
2017-07-03DH*37268296.90 ppb
2017-07-03DH*3726830ND
2017-07-03DH*3726831ND
2017-10-02DH*37918494.80 ppb
2017-10-02DH*37918506.10 ppb
2017-10-02DH*37918511.10 ppb
2017-10-02DH*37918521.000 ppb