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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Arcadia

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)

72

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.731 ppb168ND - 2.20 ppb
20151.31 ppb1612ND - 2.50 ppb
20161.48 ppb1613ND - 2.50 ppb
20171.06 ppb1612ND - 2.10 ppb
20181.20 ppb2015ND - 2.60 ppb
20191.43 ppb1612ND - 3.60 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
2014-01-319588-802-11001.20 ppb
2014-01-319588-800-11152.00 ppb
2014-01-319588-801-11251.40 ppb
2014-01-319588-803-1140ND
2014-04-249588-803-1315ND
2014-04-249588-802-13551.10 ppb
2014-04-249588-801-13301.20 ppb
2014-04-249588-800-13401.40 ppb
2014-07-289588-803-1320ND
2014-07-289588-802-1410ND
2014-07-289588-801-1345ND
2014-07-289588-800-1335ND
2014-10-289588-802-1215ND
2014-10-289588-801-12301.20 ppb
2014-10-289588-803-1240ND
2014-10-289588-800-12252.20 ppb
2015-01-309588-803-11051.10 ppb
2015-01-309588-802-10301.10 ppb
2015-01-309588-801-10501.80 ppb
2015-01-309588-800-10402.30 ppb
2015-04-309588-803-0910ND
2015-04-309588-802-09451.90 ppb
2015-04-309588-800-09201.60 ppb
2015-04-309588-801-09351.80 ppb
2015-07-319588-801-09401.90 ppb
2015-07-319588-800-09502.50 ppb
2015-07-319588-803-1005ND
2015-07-319588-802-09251.50 ppb
2015-10-309588-801-11101.30 ppb
2015-10-309588-800-11002.20 ppb
2015-10-309588-803-1125ND
2015-10-309588-802-1045ND
2016-01-299588-801-11151.70 ppb
2016-01-299588-800-11051.80 ppb
2016-01-299588-803-11301.10 ppb
2016-01-299588-802-10501.000 ppb
2016-04-289588-801-10102.50 ppb
2016-04-289588-800-09552.00 ppb
2016-04-289588-803-1025ND
2016-04-289588-802-09451.60 ppb
2016-07-299588-801-11252.40 ppb
2016-07-299588-800-11152.40 ppb
2016-07-299588-803-1140ND
2016-07-299588-802-11001.30 ppb
2016-10-289588-800-09452.10 ppb
2016-10-289588-802-09301.80 ppb
2016-10-289588-803-1010ND
2016-10-289588-801-09551.90 ppb
2017-01-309588-801-09501.70 ppb
2017-01-309588-800-09401.80 ppb
2017-01-309588-802-09251.70 ppb
2017-01-309588-803-10001.20 ppb
2017-04-289588-803-0955ND
2017-04-289588-800-09301.000 ppb
2017-04-289588-801-09401.10 ppb
2017-04-289588-802-09201.10 ppb
2017-07-319588-803-1355ND
2017-07-319588-801-14252.10 ppb
2017-07-319588-800-14151.50 ppb
2017-07-319588-802-14451.10 ppb
2017-10-319588-803-1015ND
2017-10-319588-800-09551.30 ppb
2017-10-319588-802-0945ND
2017-10-319588-801-10051.40 ppb
2018-01-319588-802-09401.20 ppb
2018-01-319588-803-1025ND
2018-01-319588-800-09551.20 ppb
2018-01-319588-801-10051.60 ppb
2018-02-209588-802-08551.40 ppb
2018-02-209588-803-09251.10 ppb
2018-02-209588-800-09101.80 ppb
2018-02-209588-801-09201.60 ppb
2018-04-279588-803-09451.10 ppb
2018-04-279588-800-10002.60 ppb
2018-04-279588-801-10101.90 ppb
2018-04-279588-802-10201.60 ppb
2018-07-309588-802-0930ND
2018-07-309588-803-1020ND
2018-07-309588-801-10001.50 ppb
2018-07-309588-800-0945ND
2018-10-309588-803-1020ND
2018-10-309588-802-09401.000 ppb
2018-10-309588-801-10051.80 ppb
2018-10-309588-800-09552.60 ppb
2019-01-299588-803-1030ND
2019-01-299588-800-09551.60 ppb
2019-01-299588-801-10051.70 ppb
2019-01-299588-802-09451.40 ppb
2019-04-299588-800-09552.50 ppb
2019-04-299588-802-09402.80 ppb
2019-04-299588-803-1025ND
2019-04-299588-801-10103.60 ppb
2019-07-299588-802-08451.000 ppb
2019-07-299588-800-09001.30 ppb
2019-07-299588-803-0935ND
2019-07-299588-801-09201.80 ppb
2019-10-299588-802-09201.30 ppb
2019-10-299588-801-09451.50 ppb
2019-10-299588-800-09352.30 ppb
2019-10-299588-803-0955ND