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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Vinton

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

 

88

Samples

0

Samples exceeding legal limit (MCL)

53

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.30 ppb168ND - 7.77 ppb
20150.518 ppb123ND - 3.37 ppb
20161.22 ppb1611ND - 3.33 ppb
20172.63 ppb1611ND - 16.9 ppb
20183.41 ppb1611ND - 10.1 ppb
20191.66 ppb129ND - 6.50 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
2014-01-081401570-02AND
2014-01-081401570-06A1.15 ppb
2014-01-081401570-04AND
2014-01-081401570-08A1.06 ppb
2014-04-021404420-05A1.31 ppb
2014-04-021404420-03AND
2014-04-021404420-01AND
2014-04-021404420-07AND
2014-07-021407333-06A-H3.81 ppb
2014-07-021407333-10A-H7.77 ppb
2014-07-021407333-04A-H1.07 ppb
2014-07-021407333-08A-H3.43 ppb
2014-12-091412C64-08A-HND
2014-12-091412C64-02A-H1.21 ppb
2014-12-091412C64-04A-HND
2014-12-091412C64-06A-HND
2015-01-2100281-REI CONSULND
2015-01-2100281-REI CONSULND
2015-01-2100281-REI CONSULND
2015-01-2100281-REI CONSULND
2015-08-0400281-REI CONSULND
2015-08-0400281-REI CONSULND
2015-08-0400281-REI CONSULND
2015-08-0400281-REI CONSUL1.70 ppb
2015-10-1200281-REI CONSUL1.14 ppb
2015-10-1200281-REI CONSULND
2015-10-1200281-REI CONSULND
2015-10-1200281-REI CONSUL3.37 ppb
2016-02-021602286-04A-H0.500 ppb
2016-02-021602286-06A-HND
2016-02-021602286-08A-HND
2016-02-021602286-02A-HND
2016-04-2616042820-08A3.33 ppb
2016-04-2616042820-06A1.12 ppb
2016-04-2616042820-04A1.14 ppb
2016-04-2616042820-02A2.17 ppb
2016-07-0716070847-07AND
2016-07-0716070847-05A1.33 ppb
2016-07-0716070847-03AND
2016-08-0816081088-02A3.24 ppb
2016-10-2616102914-01A2.70 ppb
2016-10-2616102914-03A1.50 ppb
2016-10-2616102914-05A1.40 ppb
2016-10-2616102914-07A1.06 ppb
2017-01-1117011141-08A1.43 ppb
2017-01-1117011141-04AND
2017-01-1117011141-06AND
2017-01-1117011141-02A1.08 ppb
2017-04-1017041096-04AND
2017-04-1017041096-08A1.07 ppb
2017-04-1017041096-06A1.27 ppb
2017-04-1017041096-02A1.24 ppb
2017-08-0717081058-05A3.82 ppb
2017-08-0717081058-07A4.07 ppb
2017-08-0717081058-01A4.20 ppb
2017-08-0717081058-03A16.9 ppb
2017-10-1117101562-06A2.88 ppb
2017-10-1117101562-02A4.14 ppb
2017-10-1117101562-08AND
2017-10-1117101562-04AND
2018-01-1818012073-08A3.51 ppb
2018-01-1818012073-06A3.68 ppb
2018-01-1818012073-04A7.39 ppb
2018-01-1818012073-02A3.62 ppb
2018-04-2518043442-08A9.57 ppb
2018-04-2518043442-02AND
2018-04-2518043442-04AND
2018-04-2518043442-06AND
2018-08-1418082825-02A4.82 ppb
2018-08-1418082825-04A10.1 ppb
2018-08-1418082825-06A2.83 ppb
2018-08-1418082825-08A7.14 ppb
2018-10-2518103392-02AND
2018-10-2518103392-04A0.508 ppb
2018-10-2518103392-06A1.47 ppb
2018-10-2518103392-08AND
2019-03-0619030781-02A3.26 ppb
2019-03-0619030781-04A0.530 ppb
2019-03-0619030781-06A1.32 ppb
2019-03-0619030781-08A1.44 ppb
2019-05-2319053126-04AND
2019-05-2319053126-08A1.46 ppb
2019-05-2319053126-06A0.885 ppb
2019-05-2319053126-02A6.50 ppb
2019-11-197387260083.00 ppb
2019-11-197387260061.50 ppb
2019-11-19738726004ND
2019-11-19738726002ND