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EWG's Tap Water Database — 2019 UPDATE

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Haloacetic acids (HAA5)

Combine Water Supply Corporation

NOTE: Combine Water Supply Corporation purchases water from City of Seagoville which is required to test for haloacetic acids (haa5). Sample information shown below was taken by City of Seagoville.

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.

 

93

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20125.47 ppb333.10 ppb - 9.90 ppb
20135.60 ppb441.000 ppb - 14.2 ppb
20148.13 ppb442.60 ppb - 13.5 ppb
201510.5 ppb446.70 ppb - 19.2 ppb
20168.53 ppb443.60 ppb - 16.4 ppb
20177.05 ppb442.80 ppb - 11.3 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

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

NOTE: Combine Water Supply Corporation purchases water from City of Seagoville which is required to test for haloacetic acids (haa5). Sample information shown below was taken by City of Seagoville.

Date Lab ID Result
2012-02-2112025860039.80 ppb
2012-05-1612056510088.20 ppb
2012-05-1612056510079.50 ppb
2012-05-1612056510068.00 ppb
2012-05-1612056510057.80 ppb
2012-07-3112081000089.40 ppb
2012-07-31120810000511.5 ppb
2012-07-31120810000612.4 ppb
2012-07-31120810000712.2 ppb
2012-10-301210A290067.70 ppb
2012-10-301210A290056.50 ppb
2012-10-301210A290074.00 ppb
2012-10-301210A290086.00 ppb
2013-02-12130241500713.2 ppb
2013-02-12130241500913.7 ppb
2013-02-12130241500810.4 ppb
2013-02-12130241500613.5 ppb
2013-04-16130456600512.4 ppb
2013-04-16130456600611.9 ppb
2013-04-16130456600711.5 ppb
2013-04-16130456600811.0 ppb
2013-07-30Q13045590029.00 ppb
2013-07-30Q13045590019.30 ppb
2013-07-30Q13045590049.00 ppb
2013-07-30Q130455900311.0 ppb
2013-10-28Q13099790045.30 ppb
2013-10-28Q13099790038.90 ppb
2013-10-28Q13099790028.00 ppb
2013-10-28Q13099790019.30 ppb
2014-03-17Q140846400114.9 ppb
2014-03-17Q140846400215.1 ppb
2014-03-17Q140846400315.6 ppb
2014-03-17Q140846400412.8 ppb
2014-05-15Q14165980047.50 ppb
2014-05-15Q14165980027.30 ppb
2014-05-15Q14165980037.50 ppb
2014-05-15Q14165980017.20 ppb
2014-09-02Q1440529001ND
2014-09-02Q14405290029.40 ppb
2014-09-02Q14405290039.20 ppb
2014-09-02Q14405290046.30 ppb
2014-10-28Q14544380028.30 ppb
2014-10-28Q145443800112.4 ppb
2014-10-28Q14544380057.90 ppb
2014-10-28Q145443800411.5 ppb
2015-01-27Q15031470056.10 ppb
2015-01-27Q15031470049.20 ppb
2015-01-27Q150314700313.8 ppb
2015-01-27Q15031470026.20 ppb
2015-05-26Q15190360041.20 ppb
2015-05-26Q151903600328.2 ppb
2015-05-26Q151903600229.2 ppb
2015-05-26Q15190360012.50 ppb
2015-08-12Q153177900112.6 ppb
2015-08-12Q153177900217.2 ppb
2015-08-12Q153177900322.2 ppb
2015-08-12Q153177900411.1 ppb
2015-10-21Q15415020013.20 ppb
2015-10-21Q154150200218.8 ppb
2015-10-21Q154150200313.6 ppb
2015-10-21Q154150200411.4 ppb
2016-01-20Q160233200410.9 ppb
2016-01-20Q160233200312.9 ppb
2016-01-20Q160233200216.2 ppb
2016-01-20Q160233200114.5 ppb
2016-04-06Q161367200113.4 ppb
2016-04-06Q161367200213.8 ppb
2016-04-06Q161367200318.3 ppb
2016-04-06Q16136720049.30 ppb
2016-07-13Q162837700417.6 ppb
2016-07-13Q162837700326.2 ppb
2016-07-13Q162837700223.3 ppb
2016-07-13Q16283770016.20 ppb
2016-10-17Q1643890001ND
2016-10-17Q164389000310.00 ppb
2016-10-17Q16438900045.50 ppb
2016-10-17Q164389000210.1 ppb
2017-01-18Q17023490016.00 ppb
2017-01-18Q17023490052.80 ppb
2017-01-18Q17023490024.10 ppb
2017-01-18Q17023490046.10 ppb
2017-04-24Q171652600214.1 ppb
2017-04-24Q171652600412.7 ppb
2017-04-24Q171652600124.7 ppb
2017-04-24Q171652600314.1 ppb
2017-07-26Q17310450037.40 ppb
2017-07-26Q173104500418.9 ppb
2017-07-26Q17310450023.10 ppb
2017-07-26Q173104500120.3 ppb
2017-10-25Q17552880023.10 ppb
2017-10-25Q17552880048.50 ppb
2017-10-25Q17552880039.50 ppb
2017-10-25Q1755288001ND