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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Burlington

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

 

209

Samples

5

Samples exceeding legal limit (MCL)

209

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201441.1 ppb434323.0 ppb - 60.0 ppb
201543.0 ppb333323.0 ppb - 67.0 ppb
201637.0 ppb373725.0 ppb - 63.0 ppb
201743.0 ppb323231.0 ppb - 62.0 ppb
201841.3 ppb323227.0 ppb - 59.0 ppb
201934.2 ppb323220.0 ppb - 60.0 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
2014-01-1315859-1438.0 ppb
2014-01-1337729_14-0150234.0 ppb
2014-02-1937729_14-0508229.0 ppb
2014-02-1937729_14-0508442.0 ppb
2014-02-1937729_14-0508529.0 ppb
2014-02-1937729_14-0508660.0 ppb
2014-02-1937729_14-0508755.0 ppb
2014-02-1937729_14-0508959.0 ppb
2014-02-1937729_14-0509050.0 ppb
2014-02-1937729_14-0509152.0 ppb
2014-04-0917228-1457.0 ppb
2014-04-0917229-1451.0 ppb
2014-04-1017230-1451.0 ppb
2014-05-21173145-1432.0 ppb
2014-05-2137729_14-1460447.0 ppb
2014-05-2137729_14-1460652.0 ppb
2014-05-2137729_14-1460746.0 ppb
2014-05-2137729_14-1460857.0 ppb
2014-05-2137729_14-1460953.0 ppb
2014-05-2137729_14-1461155.0 ppb
2014-05-2137729_14-1461248.0 ppb
2014-05-2137729_14-1461351.0 ppb
2014-06-02173144-1449.0 ppb
2014-08-2037729_14-2545335.0 ppb
2014-08-2037729_14-2545437.0 ppb
2014-08-2037729_14-2545532.0 ppb
2014-08-2037729_14-2545632.0 ppb
2014-08-2037729_14-2545732.0 ppb
2014-08-2037729_14-2545931.0 ppb
2014-08-2037729_14-2546035.0 ppb
2014-08-2037729_14-2546135.0 ppb
2014-08-20173773-1431.0 ppb
2014-08-20173774-1434.0 ppb
2014-11-1937729_14-3548842.0 ppb
2014-11-1937729_14-3548936.0 ppb
2014-11-1937729_14-3549023.0 ppb
2014-11-1937729_14-3549140.0 ppb
2014-11-1937729_14-3549230.0 ppb
2014-11-1937729_14-3549340.0 ppb
2014-11-1937729_14-3549432.0 ppb
2014-11-1937729_14-3549535.0 ppb
2014-11-19174412-1426.0 ppb
2014-11-19174413-1434.0 ppb
2015-02-1831.0 ppb
2015-02-1826.0 ppb
2015-02-1823.0 ppb
2015-02-1827.0 ppb
2015-02-1829.0 ppb
2015-02-1828.0 ppb
2015-02-1829.0 ppb
2015-02-1827.0 ppb
2015-05-1958.0 ppb
2015-05-2140.0 ppb
2015-05-2138.0 ppb
2015-05-2135.0 ppb
2015-05-2164.0 ppb
2015-05-2160.0 ppb
2015-05-2166.0 ppb
2015-05-2141.0 ppb
2015-08-1933.0 ppb
2015-08-1942.0 ppb
2015-08-1944.0 ppb
2015-08-1935.0 ppb
2015-08-1948.0 ppb
2015-08-1929.0 ppb
2015-08-1950.0 ppb
2015-08-1937.0 ppb
2015-08-1936.0 ppb
2015-11-1851.0 ppb
2015-11-1867.0 ppb
2015-11-1854.0 ppb
2015-11-1856.0 ppb
2015-11-1853.0 ppb
2015-11-1853.0 ppb
2015-11-1857.0 ppb
2015-11-1852.0 ppb
2016-02-1737729_16-0523850.0 ppb
2016-02-1737729_16-0523939.0 ppb
2016-02-1737729_16-0524044.0 ppb
2016-02-1737729_16-0524144.0 ppb
2016-02-1737729_16-0524246.0 ppb
2016-02-1737729_16-0524348.0 ppb
2016-02-1737729_16-0524443.0 ppb
2016-02-1737729_16-0524531.0 ppb
2016-05-1837729_16-1584763.0 ppb
2016-05-1837729_16-1585138.0 ppb
2016-05-1837729_16-1585230.0 ppb
2016-05-1837729_16-1585348.0 ppb
2016-05-1837729_16-1585438.0 ppb
2016-05-1837729_16-1585540.0 ppb
2016-05-1837729_16-1585639.0 ppb
2016-05-1837729_16-1585751.0 ppb
2016-08-1837729_16-2877025.0 ppb
2016-08-1837729_16-2877126.0 ppb
2016-08-1837729_16-2877235.0 ppb
2016-08-1837729_16-2877328.0 ppb
2016-08-1837729_16-2877428.0 ppb
2016-08-1837729_16-2877525.0 ppb
2016-08-1837729_16-2877626.0 ppb
2016-08-1837729_16-2877727.0 ppb
2016-08-1837729_16-2877828.0 ppb
2016-08-181140-1630.0 ppb
2016-08-2237729_16-2876957.0 ppb
2016-11-1737729_16-4061450.0 ppb
2016-11-1737729_16-4061528.0 ppb
2016-11-1737729_16-4061625.0 ppb
2016-11-1737729_16-4061738.0 ppb
2016-11-1737729_16-4061832.0 ppb
2016-11-1737729_16-4061931.0 ppb
2016-11-1737729_16-4062029.0 ppb
2016-11-1737729_16-4062139.0 ppb
2016-11-1737729_16-4062239.0 ppb
2016-11-1737729_16-4062331.0 ppb
2017-02-1537729_17-0555954.0 ppb
2017-02-1537729_17-0556044.0 ppb
2017-02-1537729_17-0556133.0 ppb
2017-02-1537729_17-0556243.0 ppb
2017-02-1537729_17-0556338.0 ppb
2017-02-1537729_17-0556439.0 ppb
2017-02-1537729_17-0556537.0 ppb
2017-02-1537729_17-0556637.0 ppb
2017-05-1737729_17-1660353.0 ppb
2017-05-1737729_17-1660441.0 ppb
2017-05-1737729_17-1660536.0 ppb
2017-05-1737729_17-1660655.0 ppb
2017-05-1737729_17-1660743.0 ppb
2017-05-1737729_17-1660852.0 ppb
2017-05-1737729_17-1660962.0 ppb
2017-05-1737729_17-1661050.0 ppb
2017-08-1637729_17-2951342.0 ppb
2017-08-1637729_17-2951452.0 ppb
2017-08-1637729_17-2951534.0 ppb
2017-08-1637729_17-2951640.0 ppb
2017-08-1637729_17-2951744.0 ppb
2017-08-1637729_17-2951852.0 ppb
2017-08-1637729_17-2951954.0 ppb
2017-08-1637729_17-2952037.0 ppb
2017-11-1537729_17-4344134.0 ppb
2017-11-1537729_17-4344238.0 ppb
2017-11-1537729_17-4344340.0 ppb
2017-11-1537729_17-4344433.0 ppb
2017-11-1537729_17-4344542.0 ppb
2017-11-1537729_17-4344647.0 ppb
2017-11-1537729_17-4344739.0 ppb
2017-11-1537729_17-4344831.0 ppb
2018-02-2037729_18-07245 48.0 ppb
2018-02-2137729_18-07243 40.0 ppb
2018-02-2137729_18-07246 39.0 ppb
2018-02-2137729_18-07247 36.0 ppb
2018-02-2137729_18-07248 45.0 ppb
2018-02-2137729_18-07249 48.0 ppb
2018-02-2137729_18-07250 40.0 ppb
2018-02-2137729_18-07251 32.0 ppb
2018-05-3037729_18-21553 53.0 ppb
2018-05-3037729_18-21554 48.0 ppb
2018-05-3037729_18-21555 51.0 ppb
2018-05-3037729_18-21556 46.0 ppb
2018-05-3037729_18-21557 38.0 ppb
2018-05-3037729_18-21558 43.0 ppb
2018-05-3037729_18-21559 40.0 ppb
2018-05-3037729_18-21560 40.0 ppb
2018-08-1537729_18-34328 35.0 ppb
2018-08-1537729_18-34329 32.0 ppb
2018-08-1537729_18-34330 41.0 ppb
2018-08-1537729_18-34331 37.0 ppb
2018-08-1537729_18-34332 27.0 ppb
2018-08-1537729_18-34333 34.0 ppb
2018-08-1537729_18-34334 29.0 ppb
2018-08-1537729_18-34335 34.0 ppb
2018-11-1437729_18-48169 59.0 ppb
2018-11-1437729_18-48170 49.0 ppb
2018-11-1437729_18-48171 43.0 ppb
2018-11-1437729_18-48172 44.0 ppb
2018-11-1437729_18-48173 49.0 ppb
2018-11-1437729_18-48174 45.0 ppb
2018-11-1437729_18-48175 39.0 ppb
2018-11-1437729_18-48176 37.0 ppb
2019-02-1937729_19-07385 28.0 ppb
2019-02-1937729_19-07386 40.0 ppb
2019-02-1937729_19-07387 30.0 ppb
2019-02-1937729_19-07388 28.0 ppb
2019-02-1937729_19-07389 38.0 ppb
2019-02-1937729_19-07390 38.0 ppb
2019-02-1937729_19-07391 39.0 ppb
2019-02-1937729_19-07392 32.0 ppb
2019-05-1537729_19-20130 50.0 ppb
2019-05-1537729_19-20131 49.0 ppb
2019-05-1537729_19-20132 35.0 ppb
2019-05-1537729_19-20133 42.0 ppb
2019-05-1537729_19-20134 40.0 ppb
2019-05-1537729_19-20135 60.0 ppb
2019-05-1537729_19-20136 41.0 ppb
2019-05-1537729_19-20137 50.0 ppb
2019-08-2137729_19-36220 32.0 ppb
2019-08-2137729_19-36221 31.0 ppb
2019-08-2137729_19-36222 30.0 ppb
2019-08-2137729_19-36223 31.0 ppb
2019-08-2137729_19-36224 20.0 ppb
2019-08-2137729_19-36225 27.0 ppb
2019-08-2137729_19-36226 21.0 ppb
2019-08-2137729_19-36227 30.0 ppb
2019-11-2037729_19-50098 40.0 ppb
2019-11-2037729_19-50102 29.0 ppb
2019-11-2037729_19-50103 28.0 ppb
2019-11-2037729_19-50104 30.0 ppb
2019-11-2037729_19-50105 27.0 ppb
2019-11-2037729_19-50106 26.0 ppb
2019-11-2037729_19-50107 27.0 ppb
2019-11-2037729_19-50108 25.0 ppb