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EWG's Tap Water Database — 2019 UPDATE

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Haloacetic acids (HAA5)

Garden City Water and Sewer 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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND80ND
2013ND80ND
2014ND20ND
2015ND20ND
2016ND20ND
2017ND20ND

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
2012-07-12D1221131ND
2012-07-12D1221130ND
2012-07-12D1221129ND
2012-07-12D1221128ND
2012-07-12D1221127ND
2012-07-12D1221126ND
2012-07-12D1221133ND
2012-07-12D1221132ND
2013-07-10D1329615ND
2013-07-10D1329616ND
2013-07-10D1329617ND
2013-07-10D1329618ND
2013-07-10D1329619ND
2013-07-10D1329620ND
2013-07-10D1329621ND
2013-07-10D1329622ND
2014-07-01D1424567ND
2014-07-01D1424566ND
2015-07-16D1528921ND
2015-07-16D1528920ND
2016-07-18D1631710ND
2016-07-18D1631709ND
2017-07-12D1730457ND
2017-07-12D1730456ND