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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Grain Valley

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.

 

32

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20142.70 ppb194ND - 13.3 ppb
2015ND60ND
2016ND20ND
2017ND20ND
2018ND10ND
2019ND20ND

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
2014-04-07AC19855ND
2014-04-07AC19856ND
2014-04-07AC19858ND
2014-06-12AC28484ND
2014-06-12AC2848513.3 ppb
2014-06-12AC28486ND
2014-06-12AC28487ND
2014-06-12AC2848812.1 ppb
2014-06-12AC2848912.9 ppb
2014-06-12AC28490ND
2014-06-12AC2849113.0 ppb
2014-09-18AC35562ND
2014-09-18AC35561ND
2014-09-18AC35560ND
2014-09-18AC35559ND
2014-12-16AC39457ND
2014-12-16AC39455ND
2014-12-16AC39456ND
2014-12-16AC39454ND
2015-03-13AC43534ND
2015-03-13AC43535ND
2015-03-13AC43537ND
2015-03-13AC43536ND
2015-06-10AC51150ND
2015-06-10AC51151ND
2016-06-09AC74805ND
2016-06-09AC74804ND
2017-06-09AC98395ND
2017-06-09AC98396ND
2018-06-13AD27224ND
2019-06-10AD49027ND
2019-06-10AD49028ND