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EWG's Tap Water Database — 2019 UPDATE

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Haloacetic acids (HAA5)

Farmington City Water System

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.

 

58

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND100ND
20130.313 ppb162ND - 2.50 ppb
2014ND80ND
20150.313 ppb81ND - 2.50 ppb
20161.45 ppb82ND - 7.10 ppb
2017ND80ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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 Result
2012-09-11ND
2012-09-11ND
2012-09-11ND
2012-09-11ND
2012-12-04ND
2012-12-04ND
2012-12-04ND
2012-12-04ND
2012-12-04ND
2012-12-04ND
2013-03-13ND
2013-03-13ND
2013-03-13ND
2013-03-13ND
2013-06-24ND
2013-06-24ND
2013-06-24ND
2013-06-24ND
2013-08-272.50 ppb
2013-08-27ND
2013-08-27ND
2013-08-272.50 ppb
2013-12-17ND
2013-12-17ND
2013-12-17ND
2013-12-17ND
2014-02-27ND
2014-02-27ND
2014-06-17ND
2014-06-17ND
2014-09-17ND
2014-09-17ND
2014-12-11ND
2014-12-11ND
2015-03-10ND
2015-03-10ND
2015-06-11ND
2015-06-112.50 ppb
2015-09-23ND
2015-09-23ND
2015-12-09ND
2015-12-09ND
2016-03-02ND
2016-03-02ND
2016-06-22ND
2016-06-22ND
2016-09-01ND
2016-09-014.50 ppb
2016-11-097.10 ppb
2016-11-09ND
2017-03-08ND
2017-03-08ND
2017-05-12ND
2017-05-12ND
2017-07-20ND
2017-07-20ND
2017-10-18ND
2017-10-18ND