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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Denham Springs Water 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.

MORE ABOUT THIS CONTAMINANT

 

192

Samples

0

Samples exceeding legal limit (MCL)

94

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND320ND
20150.476 ppb322ND - 7.62 ppb
2016ND320ND
20174.29 ppb32320.580 ppb - 8.30 ppb
20186.87 ppb32321.44 ppb - 14.3 ppb
20194.29 ppb3228ND - 17.5 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
2014-02-271281491ND
2014-02-271281492ND
2014-02-271281493ND
2014-02-271281496ND
2014-02-271281491ND
2014-02-271281492ND
2014-02-271281493ND
2014-02-271281496ND
2014-05-291305553ND
2014-05-291305558ND
2014-05-291305559ND
2014-05-291305560ND
2014-05-291305553ND
2014-05-291305558ND
2014-05-291305559ND
2014-05-291305560ND
2014-08-071324590ND
2014-08-071324595ND
2014-08-071324596ND
2014-08-071324597ND
2014-08-071324590ND
2014-08-071324595ND
2014-08-071324596ND
2014-08-071324597ND
2014-11-251353453ND
2014-11-251353454ND
2014-11-251353455ND
2014-11-251353459ND
2014-11-251353453ND
2014-11-251353454ND
2014-11-251353455ND
2014-11-251353459ND
2015-02-181373929ND
2015-02-181373933ND
2015-02-181373934ND
2015-02-181373935ND
2015-02-181373929ND
2015-02-181373933ND
2015-02-181373934ND
2015-02-181373935ND
2015-05-201397046ND
2015-05-201397047ND
2015-05-201397048ND
2015-05-201397054ND
2015-05-201397046ND
2015-05-201397047ND
2015-05-201397048ND
2015-05-201397054ND
2015-08-191421235ND
2015-08-1914212367.62 ppb
2015-08-191421237ND
2015-08-191421238ND
2015-08-191421235ND
2015-08-1914212367.62 ppb
2015-08-191421237ND
2015-08-191421238ND
2015-11-241447170ND
2015-11-241447171ND
2015-11-241447172ND
2015-11-241447173ND
2015-11-241447170ND
2015-11-241447171ND
2015-11-241447172ND
2015-11-241447173ND
2016-02-181469077ND
2016-02-181469078ND
2016-02-181469079ND
2016-02-181469080ND
2016-02-181469077ND
2016-02-181469078ND
2016-02-181469079ND
2016-02-181469080ND
2016-05-181492839ND
2016-05-181492840ND
2016-05-181492841ND
2016-05-181492842ND
2016-05-181492839ND
2016-05-181492840ND
2016-05-181492841ND
2016-05-181492842ND
2016-08-101515341ND
2016-08-101515343ND
2016-08-101515344ND
2016-08-101515345ND
2016-08-101515341ND
2016-08-101515343ND
2016-08-101515344ND
2016-08-101515345ND
2016-11-221543480ND
2016-11-221543481ND
2016-11-221543482ND
2016-11-221543483ND
2016-11-221543480ND
2016-11-221543481ND
2016-11-221543482ND
2016-11-221543483ND
2017-02-06352934090014.80 ppb
2017-02-06352934090024.70 ppb
2017-02-06352934090038.20 ppb
2017-02-06352934090041.29 ppb
2017-02-06352934090014.80 ppb
2017-02-06352934090024.70 ppb
2017-02-06352934090038.20 ppb
2017-02-06352934090041.29 ppb
2017-05-04353105070027.10 ppb
2017-05-04353105070030.580 ppb
2017-05-04353105070044.80 ppb
2017-05-04353105070055.40 ppb
2017-05-04353105070027.10 ppb
2017-05-04353105070030.580 ppb
2017-05-04353105070044.80 ppb
2017-05-04353105070055.40 ppb
2017-08-01353279580014.90 ppb
2017-08-01353279580024.70 ppb
2017-08-01353279580032.50 ppb
2017-08-01353279580041.71 ppb
2017-08-01353279580014.90 ppb
2017-08-01353279580024.70 ppb
2017-08-01353279580032.50 ppb
2017-08-01353279580041.71 ppb
2017-11-02353458640012.50 ppb
2017-11-02353458640028.30 ppb
2017-11-02353458640034.90 ppb
2017-11-02353458640042.18 ppb
2017-11-02353458640012.50 ppb
2017-11-02353458640028.30 ppb
2017-11-02353458640034.90 ppb
2017-11-02353458640042.18 ppb
2018-02-01353718460018.60 ppb
2018-02-01353718460029.30 ppb
2018-02-01353718460031.44 ppb
2018-02-01353718460048.70 ppb
2018-02-01353718460018.60 ppb
2018-02-01353718460029.30 ppb
2018-02-01353718460031.44 ppb
2018-02-01353718460048.70 ppb
2018-05-04353903080018.40 ppb
2018-05-04353903080028.10 ppb
2018-05-04353903080039.20 ppb
2018-05-04353903080042.03 ppb
2018-05-04353903080018.40 ppb
2018-05-04353903080028.10 ppb
2018-05-04353903080039.20 ppb
2018-05-04353903080042.03 ppb
2018-08-07354098120019.60 ppb
2018-08-073540981200214.3 ppb
2018-08-073540981200312.8 ppb
2018-08-07354098120042.90 ppb
2018-08-07354098120019.60 ppb
2018-08-073540981200214.3 ppb
2018-08-073540981200312.8 ppb
2018-08-07354098120042.90 ppb
2018-11-02354281940013.60 ppb
2018-11-02354281940026.30 ppb
2018-11-02354281940031.96 ppb
2018-11-02354281940042.70 ppb
2018-11-02354281940013.60 ppb
2018-11-02354281940026.30 ppb
2018-11-02354281940031.96 ppb
2018-11-02354281940042.70 ppb
2019-02-15354488410012.40 ppb
2019-02-15354488410024.00 ppb
2019-02-15354488410038.00 ppb
2019-02-15354488410041.20 ppb
2019-02-15354488410012.40 ppb
2019-02-15354488410024.00 ppb
2019-02-15354488410038.00 ppb
2019-02-15354488410041.20 ppb
2019-05-0335466097001ND
2019-05-03354660970021.30 ppb
2019-05-033546609700317.5 ppb
2019-05-0335466097004ND
2019-05-0335466097001ND
2019-05-03354660970021.30 ppb
2019-05-033546609700317.5 ppb
2019-05-0335466097004ND
2019-08-01354868710013.60 ppb
2019-08-01354868710024.00 ppb
2019-08-01354868710034.30 ppb
2019-08-01354868710042.70 ppb
2019-08-01354868710013.60 ppb
2019-08-01354868710024.00 ppb
2019-08-01354868710034.30 ppb
2019-08-01354868710042.70 ppb
2019-11-01355091280013.20 ppb
2019-11-01355091280026.50 ppb
2019-11-01355091280038.00 ppb
2019-11-01355091280042.00 ppb
2019-11-01355091280013.20 ppb
2019-11-01355091280026.50 ppb
2019-11-01355091280038.00 ppb
2019-11-01355091280042.00 ppb