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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Quail Valley Utility District

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.24 ppb162ND - 18.0 ppb
2015ND160ND
20160.0688 ppb161ND - 1.10 ppb
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 Lab ID Result
2014-02-20AC43844ND
2014-02-20AC43838ND
2014-02-20AC43837ND
2014-02-20AC43834ND
2014-05-21AC54971ND
2014-05-21AC5494218.0 ppb
2014-05-21AC54938ND
2014-05-21AC54944ND
2014-08-05AC62206ND
2014-08-05AC62188ND
2014-08-05AC62207ND
2014-08-05AC62183ND
2014-10-28AC70777ND
2014-10-28AC70770ND
2014-10-28AC70773ND
2014-10-28AC707661.90 ppb
2015-02-10AC79887ND
2015-02-10AC79889ND
2015-02-10AC79911ND
2015-02-10AC79888ND
2015-05-13AC91797ND
2015-05-13AC91791ND
2015-05-13AC91793ND
2015-05-13AC91795ND
2015-09-24AD08428ND
2015-09-24AD08431ND
2015-09-24AD08432ND
2015-09-24AD08427ND
2015-12-10AD16487ND
2015-12-10AD16489ND
2015-12-10AD16490ND
2015-12-10AD16484ND
2016-02-18AD24280ND
2016-02-18AD24275ND
2016-02-18AD24279ND
2016-02-18AD24278ND
2016-04-26AD34176ND
2016-04-26AD34174ND
2016-04-26AD34184ND
2016-04-26AD341731.10 ppb
2016-09-22AD50658ND
2016-09-22AD50649ND
2016-09-22AD50654ND
2016-09-22AD50655ND
2016-10-19AD53752ND
2016-10-19AD53754ND
2016-10-19AD53751ND
2016-10-19AD53753ND
2017-01-18AD65341ND
2017-01-18AD65340ND
2017-01-18AD65342ND
2017-01-18AD65343ND
2017-04-12AD79420ND
2017-04-12AD79418ND
2017-04-12AD79416ND
2017-04-12AD79419ND
2017-08-02AD91806ND
2017-08-02AD91804ND
2017-08-02AD91807ND
2017-08-02AD91805ND
2017-10-11AE00353ND
2017-10-11AE00331ND
2017-10-11AE00354ND
2017-10-11AE00329ND
2018-02-28AE16006ND
2018-02-28AE15984ND
2018-02-28AE15983ND
2018-02-28AE16012ND
2018-05-29AE27853ND
2018-05-29AE27869ND
2018-05-29AE27858ND
2018-05-29AE27868ND
2018-07-24AE34300ND
2018-07-24AE34297ND
2018-07-24AE34306ND
2018-07-24AE34296ND
2018-10-04AE42687ND
2018-10-04AE42689ND
2018-10-04AE42690ND
2018-10-04AE42686ND
2019-01-30AE52151ND
2019-01-30AE52156ND
2019-01-30AE52152ND
2019-01-30AE52153ND
2019-04-18AE62928ND
2019-04-18AE62926ND
2019-04-18AE62929ND
2019-04-18AE62930ND
2019-08-12AE77977ND
2019-08-12AE77978ND
2019-08-12AE77976ND
2019-08-12AE77980ND
2019-10-16AE86755ND
2019-10-16AE86754ND
2019-10-16AE86753ND
2019-10-16AE86749ND