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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Bellmead

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

 

62

Samples

0

Samples exceeding legal limit (MCL)

45

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.988 ppb1611ND - 3.20 ppb
20152.09 ppb1612ND - 16.0 ppb
20160.894 ppb1610ND - 2.00 ppb
2017ND20ND
20182.40 ppb221.20 ppb - 3.60 ppb
20191.51 ppb10101.000 ppb - 2.40 ppb

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
2014-03-06AC459401.10 ppb
2014-03-06AC459531.20 ppb
2014-03-06AC45952ND
2014-03-06AC45951ND
2014-04-16AC508163.20 ppb
2014-04-16AC508151.30 ppb
2014-04-16AC508141.000 ppb
2014-04-16AC508171.10 ppb
2014-08-12AC632541.60 ppb
2014-08-12AC63222ND
2014-08-12AC63224ND
2014-08-12AC632561.30 ppb
2014-11-18AC723881.20 ppb
2014-11-18AC72364ND
2014-11-18AC723951.40 ppb
2014-11-18AC723991.40 ppb
2015-02-17AC808102.50 ppb
2015-02-17AC808071.90 ppb
2015-02-17AC808061.30 ppb
2015-02-17AC808081.20 ppb
2015-05-13AC9182216.0 ppb
2015-05-13AC918233.10 ppb
2015-05-13AC91821ND
2015-05-13AC91824ND
2015-07-27AD01041ND
2015-07-27AD010401.30 ppb
2015-07-27AD010391.50 ppb
2015-07-27AD010421.10 ppb
2015-10-01AD092571.30 ppb
2015-10-01AD092581.000 ppb
2015-10-01AD092561.30 ppb
2015-10-01AD09259ND
2016-01-14AD181831.60 ppb
2016-01-14AD181821.50 ppb
2016-01-14AD181881.10 ppb
2016-01-14AD181841.10 ppb
2016-04-11AD325321.50 ppb
2016-04-11AD325172.00 ppb
2016-04-11AD32531ND
2016-04-11AD325161.000 ppb
2016-07-13AD440721.50 ppb
2016-07-13AD440621.30 ppb
2016-07-13AD440651.70 ppb
2016-07-13AD44067ND
2016-10-11AD53129ND
2016-10-11AD53127ND
2016-10-11AD53134ND
2016-10-11AD53133ND
2017-08-14AD92822ND
2017-08-14AD92825ND
2018-05-02AE247483.60 ppb
2018-05-02AE247751.20 ppb
2019-05-21AE673302.10 ppb
2019-05-21AE673311.000 ppb
2019-07-24AE757142.40 ppb
2019-07-24AE757651.10 ppb
2019-07-24AE757631.70 ppb
2019-07-24AE757641.40 ppb
2019-10-17AE868861.10 ppb
2019-10-17AE868811.80 ppb
2019-10-17AE868841.10 ppb
2019-10-17AE868851.40 ppb