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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

West Hwy 80 Ark Road WS

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)

138

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.88 ppb328ND - 15.7 ppb
20154.89 ppb3210ND - 20.6 ppb
20169.27 ppb3224ND - 17.4 ppb
201723.2 ppb323212.7 ppb - 49.6 ppb
201827.8 ppb323220.6 ppb - 40.0 ppb
201925.2 ppb323211.3 ppb - 35.1 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
2014-02-181278951ND
2014-02-181278952ND
2014-02-181278953ND
2014-02-181278954ND
2014-02-181278951ND
2014-02-181278952ND
2014-02-181278953ND
2014-02-181278954ND
2014-05-151302273ND
2014-05-151302274ND
2014-05-151302275ND
2014-05-151302276ND
2014-05-151302273ND
2014-05-151302274ND
2014-05-151302275ND
2014-05-151302276ND
2014-08-21132864015.7 ppb
2014-08-2113286419.63 ppb
2014-08-2113286429.87 ppb
2014-08-21132864310.9 ppb
2014-08-21132864015.7 ppb
2014-08-2113286419.63 ppb
2014-08-2113286429.87 ppb
2014-08-21132864310.9 ppb
2014-11-251353111ND
2014-11-251353112ND
2014-11-251353113ND
2014-11-251353114ND
2014-11-251353111ND
2014-11-251353112ND
2014-11-251353113ND
2014-11-251353114ND
2015-02-181373853ND
2015-02-181373854ND
2015-02-181373855ND
2015-02-181373856ND
2015-02-181373853ND
2015-02-181373854ND
2015-02-181373855ND
2015-02-181373856ND
2015-05-191396214ND
2015-05-191396215ND
2015-05-191396216ND
2015-05-1913962176.21 ppb
2015-05-191396214ND
2015-05-191396215ND
2015-05-191396216ND
2015-05-1913962176.21 ppb
2015-08-031415897ND
2015-08-031415898ND
2015-08-031415899ND
2015-08-031415900ND
2015-08-031415897ND
2015-08-031415898ND
2015-08-031415899ND
2015-08-031415900ND
2015-11-18144567213.0 ppb
2015-11-18144567319.5 ppb
2015-11-18144567213.0 ppb
2015-11-18144567319.5 ppb
2015-11-19144567018.9 ppb
2015-11-19144567120.6 ppb
2015-11-19144567018.9 ppb
2015-11-19144567120.6 ppb
2016-02-1114673099.35 ppb
2016-02-1114673108.99 ppb
2016-02-111467311ND
2016-02-111467312ND
2016-02-1114673099.35 ppb
2016-02-1114673108.99 ppb
2016-02-111467311ND
2016-02-111467312ND
2016-05-0514900786.55 ppb
2016-05-051490079ND
2016-05-051490080ND
2016-05-05149008115.0 ppb
2016-05-0514900786.55 ppb
2016-05-051490079ND
2016-05-051490080ND
2016-05-05149008115.0 ppb
2016-08-09151478914.7 ppb
2016-08-09151479012.0 ppb
2016-08-09151479710.4 ppb
2016-08-09151479817.4 ppb
2016-08-09151478914.7 ppb
2016-08-09151479012.0 ppb
2016-08-09151479710.4 ppb
2016-08-09151479817.4 ppb
2016-11-01153796311.0 ppb
2016-11-01153796415.4 ppb
2016-11-01153797115.7 ppb
2016-11-01153797211.8 ppb
2016-11-01153796311.0 ppb
2016-11-01153796415.4 ppb
2016-11-01153797115.7 ppb
2016-11-01153797211.8 ppb
2017-02-093529454802322.3 ppb
2017-02-093529454802412.8 ppb
2017-02-093529454802516.9 ppb
2017-02-093529454802614.5 ppb
2017-02-093529454802322.3 ppb
2017-02-093529454802412.8 ppb
2017-02-093529454802516.9 ppb
2017-02-093529454802614.5 ppb
2017-05-053531061803126.6 ppb
2017-05-053531061803224.7 ppb
2017-05-053531061803327.6 ppb
2017-05-053531061803412.7 ppb
2017-05-053531061803126.6 ppb
2017-05-053531061803224.7 ppb
2017-05-053531061803327.6 ppb
2017-05-053531061803412.7 ppb
2017-08-143533128500925.9 ppb
2017-08-143533128501026.8 ppb
2017-08-143533128501149.6 ppb
2017-08-143533128500925.9 ppb
2017-08-143533128501026.8 ppb
2017-08-143533128501149.6 ppb
2017-08-293533322100120.3 ppb
2017-08-293533322100120.3 ppb
2017-11-093534754900121.6 ppb
2017-11-093534754900223.5 ppb
2017-11-093534754900330.2 ppb
2017-11-093534754900414.6 ppb
2017-11-093534754900121.6 ppb
2017-11-093534754900223.5 ppb
2017-11-093534754900330.2 ppb
2017-11-093534754900414.6 ppb
2018-02-213537614800122.2 ppb
2018-02-213537614800228.2 ppb
2018-02-213537614800323.7 ppb
2018-02-213537614800420.6 ppb
2018-02-213537614800122.2 ppb
2018-02-213537614800228.2 ppb
2018-02-213537614800323.7 ppb
2018-02-213537614800420.6 ppb
2018-05-213539392800131.8 ppb
2018-05-213539392800229.6 ppb
2018-05-213539392800331.4 ppb
2018-05-213539392800422.0 ppb
2018-05-213539392800131.8 ppb
2018-05-213539392800229.6 ppb
2018-05-213539392800331.4 ppb
2018-05-213539392800422.0 ppb
2018-08-153541161600127.1 ppb
2018-08-153541161600233.8 ppb
2018-08-153541161600331.6 ppb
2018-08-153541161600420.7 ppb
2018-08-153541161600127.1 ppb
2018-08-153541161600233.8 ppb
2018-08-153541161600331.6 ppb
2018-08-153541161600420.7 ppb
2018-11-013542822500531.6 ppb
2018-11-013542822500626.1 ppb
2018-11-013542822500724.5 ppb
2018-11-013542822500840.0 ppb
2018-11-013542822500531.6 ppb
2018-11-013542822500626.1 ppb
2018-11-013542822500724.5 ppb
2018-11-013542822500840.0 ppb
2019-02-183544936000111.3 ppb
2019-02-183544936000220.0 ppb
2019-02-183544936000321.2 ppb
2019-02-183544936000417.1 ppb
2019-02-183544936000111.3 ppb
2019-02-183544936000220.0 ppb
2019-02-183544936000321.2 ppb
2019-02-183544936000417.1 ppb
2019-05-153546931900135.1 ppb
2019-05-153546931900228.0 ppb
2019-05-153546931900333.5 ppb
2019-05-153546931900418.0 ppb
2019-05-153546931900135.1 ppb
2019-05-153546931900228.0 ppb
2019-05-153546931900333.5 ppb
2019-05-153546931900418.0 ppb
2019-08-013548702200124.0 ppb
2019-08-013548702200223.0 ppb
2019-08-013548702200327.0 ppb
2019-08-013548702200420.9 ppb
2019-08-013548702200124.0 ppb
2019-08-013548702200223.0 ppb
2019-08-013548702200327.0 ppb
2019-08-013548702200420.9 ppb
2019-11-193551408700132.9 ppb
2019-11-193551408700231.7 ppb
2019-11-193551408700334.4 ppb
2019-11-193551408700424.7 ppb
2019-11-193551408700132.9 ppb
2019-11-193551408700231.7 ppb
2019-11-193551408700334.4 ppb
2019-11-193551408700424.7 ppb