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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Murray 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.

MORE ABOUT THIS CONTAMINANT

 

97

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND200ND
2015ND80ND
2016ND210ND
2017ND160ND
2018ND160ND
2019ND160ND

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 Result
2014-01-15ND
2014-01-15ND
2014-01-15ND
2014-01-15ND
2014-02-25ND
2014-02-25ND
2014-02-25ND
2014-02-25ND
2014-06-24ND
2014-06-24ND
2014-06-24ND
2014-06-24ND
2014-09-17ND
2014-09-17ND
2014-09-17ND
2014-09-17ND
2014-10-29ND
2014-10-29ND
2014-10-29ND
2014-10-29ND
2015-04-16ND
2015-04-16ND
2015-04-16ND
2015-04-16ND
2015-06-18ND
2015-06-18ND
2015-06-18ND
2015-06-18ND
2016-02-09ND
2016-02-09ND
2016-02-09ND
2016-02-09ND
2016-02-09ND
2016-03-09ND
2016-03-09ND
2016-03-09ND
2016-03-09ND
2016-05-09ND
2016-05-09ND
2016-05-09ND
2016-05-09ND
2016-08-23ND
2016-08-23ND
2016-08-23ND
2016-08-23ND
2016-11-29ND
2016-11-29ND
2016-11-29ND
2016-11-29ND
2017-02-08ND
2017-02-08ND
2017-02-08ND
2017-02-08ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-08-18ND
2017-08-18ND
2017-08-18ND
2017-08-18ND
2017-11-20ND
2017-11-20ND
2017-11-20ND
2017-11-20ND
2018-02-05ND
2018-02-05ND
2018-02-05ND
2018-02-05ND
2018-06-06ND
2018-06-06ND
2018-06-06ND
2018-06-06ND
2018-08-24ND
2018-08-24ND
2018-08-24ND
2018-08-24ND
2018-11-14ND
2018-11-14ND
2018-11-14ND
2018-11-14ND
2019-02-21ND
2019-02-21ND
2019-02-21ND
2019-02-21ND
2019-05-13ND
2019-05-13ND
2019-05-13ND
2019-05-13ND
2019-08-26ND
2019-08-26ND
2019-08-26ND
2019-08-26ND
2019-11-06ND
2019-11-06ND
2019-11-06ND
2019-11-06ND