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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Deridder 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

 

80

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND320ND
2015ND320ND
20160.490 ppb42ND - 0.980 ppb
2017ND40ND
20180.770 ppb440.760 ppb - 0.780 ppb
20190.725 ppb42ND - 1.45 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
2014-02-1935127180004ND
2014-02-1935127180001ND
2014-02-1935127180003ND
2014-02-1935127180004ND
2014-02-193512780002ND
2014-02-1935127180003ND
2014-02-1935127180001ND
2014-02-193512780002ND
2014-05-2035138860001ND
2014-05-2035138860001ND
2014-05-2035138860004ND
2014-05-2035138860003ND
2014-05-2035138860002ND
2014-05-2035138860004ND
2014-05-2035138860003ND
2014-05-2035138860002ND
2014-08-2035151582001ND
2014-08-2035151582002ND
2014-08-2035151582003ND
2014-08-2035151582004ND
2014-08-2035151582004ND
2014-08-2035151582003ND
2014-08-2035151582002ND
2014-08-2035151582001ND
2014-11-1835164770002ND
2014-11-1835164770003ND
2014-11-1835164770004ND
2014-11-1835164770001ND
2014-11-1835164770004ND
2014-11-1835164770003ND
2014-11-1835164770002ND
2014-11-1835164770001ND
2015-02-1735176101004ND
2015-02-1735176101004ND
2015-02-1735176101003ND
2015-02-1735176101002ND
2015-02-1735176101001ND
2015-02-1735176101003ND
2015-02-1735176101002ND
2015-02-1735176101001ND
2015-05-2135189637004ND
2015-05-2135189637003ND
2015-05-2135189637002ND
2015-05-2135189637001ND
2015-05-2135189637004ND
2015-05-2135189637003ND
2015-05-2135189637002ND
2015-05-2135189637001ND
2015-08-1935203492001ND
2015-08-1935203492004ND
2015-08-1935203492003ND
2015-08-1935203492001ND
2015-08-1935203492002ND
2015-08-1935203492003ND
2015-08-1935203492004ND
2015-08-1935203492002ND
2015-11-1635216977001ND
2015-11-1635216977003ND
2015-11-1635216977002ND
2015-11-1635216977001ND
2015-11-1635216977004ND
2015-11-1635216977002ND
2015-11-1635216977003ND
2015-11-1635216977004ND
2016-08-1635260425002ND
2016-08-16352604250010.980 ppb
2016-08-16352604250010.980 ppb
2016-08-1635260425002ND
2017-08-0235328357005ND
2017-08-0235328357006ND
2017-08-0235328357005ND
2017-08-0235328357006ND
2018-08-01354086890010.760 ppb
2018-08-01354086890010.760 ppb
2018-08-01354086890020.780 ppb
2018-08-01354086890020.780 ppb
2019-08-01354870410011.45 ppb
2019-08-0135487041002ND
2019-08-01354870410011.45 ppb
2019-08-0135487041002ND