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EWG's Tap Water Database — 2019 UPDATE

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Haloacetic acids (HAA5)

United Water Pennsylvania

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.

 

223

Samples

25

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201232.1 ppb3531ND - 71.3 ppb
201336.1 ppb323210.3 ppb - 70.0 ppb
201432.9 ppb33335.50 ppb - 81.9 ppb
201538.1 ppb404011.0 ppb - 89.9 ppb
201640.6 ppb404013.7 ppb - 67.1 ppb
201747.5 ppb434311.7 ppb - 95.1 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2012-02-08441 CAMERON29.1 ppb
2012-02-08CD EAST ADMN23.3 ppb
2012-02-08DAUPHIN VOTE41.0 ppb
2012-02-08HUMMELSTOWN13.7 ppb
2012-02-08SHERATON HOT14.1 ppb
2012-02-08OLMSTEAD PLAND
2012-02-0841 CEYMORE S20.2 ppb
2012-02-08118 PLEASANT20.8 ppb
2012-02-08SCHUYKILL ST42.2 ppb
2012-05-08441 CAMERON44.5 ppb
2012-05-08CD ADMIN BLD43.3 ppb
2012-05-08DAUPHIN VO T47.8 ppb
2012-05-08HUMMELSTOWN35.0 ppb
2012-05-08SHERATON HOT41.2 ppb
2012-05-08OLMSTEAD PLAND
2012-05-0841 CEYMORE S51.9 ppb
2012-05-08118 PLEASANT55.8 ppb
2012-05-08SCHUYKILL ST37.9 ppb
2012-08-09441 CAMERON19.4 ppb
2012-08-09CD ADMIN BLD21.4 ppb
2012-08-09DAUPHIN VOTE17.6 ppb
2012-08-09HUMMELSTOWN46.1 ppb
2012-08-09SHERATON HOT22.7 ppb
2012-08-09OLMSTED PLAZND
2012-08-0941 CEYMORE S32.6 ppb
2012-08-09118 PLEASANT71.3 ppb
2012-08-09SCHUYKILL STND
2012-11-08BUCKINGHAM R44.5 ppb
2012-11-08L&N BEVERAGE36.8 ppb
2012-11-08CEYMORE ST39.9 ppb
2012-11-08FOREST HILL23.8 ppb
2012-11-08DEVON MANOR50.4 ppb
2012-11-08EDGEMONT FIR43.2 ppb
2012-11-08SHERTON LIND58.0 ppb
2012-11-08OBERLIN BOOS34.8 ppb
2013-02-11BUCKINGHAM R17.6 ppb
2013-02-11L&N BEVERAGE32.8 ppb
2013-02-11CEYMORE ST23.9 ppb
2013-02-11FOREST HILL50.0 ppb
2013-02-11DEVON MANOR44.7 ppb
2013-02-11EDGEMONT FIR34.6 ppb
2013-02-11SHERTON LIND29.4 ppb
2013-02-11OBERLIN BOOS21.7 ppb
2013-05-08BUCKINGHAM R46.6 ppb
2013-05-08L&N BEVERAGE45.9 ppb
2013-05-08CEYMORE ST48.3 ppb
2013-05-08FOREST HILLS70.0 ppb
2013-05-08DEVON MANOR52.9 ppb
2013-05-08EDGEMONT FIR48.9 ppb
2013-05-08SHERATON LIN52.4 ppb
2013-05-08OBERLIN BOOS35.6 ppb
2013-08-08BUCKINGHAM R41.4 ppb
2013-08-08L&N BEVERAGE25.2 ppb
2013-08-08CEYMORE ST36.1 ppb
2013-08-08FOREST HILLS10.3 ppb
2013-08-08DEVON MANOR22.3 ppb
2013-08-08EDGEMONT FIR28.3 ppb
2013-08-08SHERATON LIN31.3 ppb
2013-08-08OBERLIN BOOS28.7 ppb
2013-11-07BUCKINGHAM R62.6 ppb
2013-11-07L&N BEVERAGE23.7 ppb
2013-11-07CEYMORE ST59.0 ppb
2013-11-07FOREST HILLS11.3 ppb
2013-11-07DEVON MANOR19.4 ppb
2013-11-07EDGEMONT FIR22.6 ppb
2013-11-07SHERATON LIN49.2 ppb
2013-11-07OBERLIN BOOS28.8 ppb
2014-02-11107134600115.4 ppb
2014-02-1110713460028.30 ppb
2014-02-11107134600316.4 ppb
2014-02-11107134600441.8 ppb
2014-02-1110713460058.80 ppb
2014-02-1110713460065.50 ppb
2014-02-11107134600715.0 ppb
2014-02-1110713460086.10 ppb
2014-05-09200607800159.8 ppb
2014-05-09200607800270.8 ppb
2014-05-09200607800356.1 ppb
2014-05-09200607800481.9 ppb
2014-05-09200607800557.3 ppb
2014-05-09200607800665.1 ppb
2014-05-09200607800757.1 ppb
2014-05-09200607800822.8 ppb
2014-08-11202271600116.1 ppb
2014-08-11202271600213.7 ppb
2014-08-11202271600310.7 ppb
2014-08-11202271600417.3 ppb
2014-08-11202271600520.1 ppb
2014-08-11202271600617.2 ppb
2014-08-1120227160079.40 ppb
2014-08-11202271600817.3 ppb
2014-11-10203916500150.3 ppb
2014-11-10203916500245.9 ppb
2014-11-10203916500349.1 ppb
2014-11-10203916500435.6 ppb
2014-11-10203916500536.5 ppb
2014-11-10203916500637.4 ppb
2014-11-10203916500747.7 ppb
2014-11-10203916500839.6 ppb
2014-12-01204244700134.2 ppb
2015-01-051236860348.9 ppb
2015-02-091248150918.4 ppb
2015-02-091248151516.9 ppb
2015-02-091248152120.8 ppb
2015-02-091248152733.7 ppb
2015-02-091248153323.1 ppb
2015-02-091248153915.6 ppb
2015-02-091248154521.7 ppb
2015-02-091248155113.9 ppb
2015-03-091259740836.4 ppb
2015-04-011259741464.1 ppb
2015-05-111284424542.2 ppb
2015-05-111284425168.9 ppb
2015-05-111284425741.1 ppb
2015-05-111284426389.9 ppb
2015-05-111284426975.1 ppb
2015-05-111284427579.6 ppb
2015-05-111284428150.9 ppb
2015-05-111284428762.8 ppb
2015-06-031284430027.0 ppb
2015-07-061310192351.3 ppb
2015-08-101322807838.3 ppb
2015-08-101322808424.6 ppb
2015-08-101322809037.5 ppb
2015-08-101322809624.7 ppb
2015-08-101322810241.0 ppb
2015-08-101322810830.9 ppb
2015-08-101322811413.3 ppb
2015-08-101322812039.1 ppb
2015-09-011322819720.5 ppb
2015-10-061347744111.0 ppb
2015-11-091359871239.5 ppb
2015-11-091359871831.8 ppb
2015-11-091359872437.6 ppb
2015-11-091359873019.0 ppb
2015-11-091359873640.9 ppb
2015-11-091359874229.2 ppb
2015-11-091359874856.2 ppb
2015-11-091359875435.7 ppb
2015-12-071371824552.4 ppb
2016-01-081383673340.5 ppb
2016-02-081395169621.8 ppb
2016-02-081395170244.1 ppb
2016-02-081395170818.3 ppb
2016-02-081395171447.5 ppb
2016-02-081395172037.6 ppb
2016-02-081395172645.6 ppb
2016-02-081395173218.3 ppb
2016-02-081395173818.9 ppb
2016-03-011395168463.4 ppb
2016-04-041406717851.7 ppb
2016-05-091436230049.9 ppb
2016-05-091436232457.5 ppb
2016-05-091436228866.8 ppb
2016-05-091436230667.1 ppb
2016-05-091436229444.0 ppb
2016-05-091436228239.1 ppb
2016-05-091436231251.6 ppb
2016-05-091436231853.8 ppb
2016-06-061436235155.6 ppb
2016-07-051469099621.6 ppb
2016-08-081486068943.4 ppb
2016-08-081486066532.2 ppb
2016-08-081486069530.7 ppb
2016-08-081486067715.1 ppb
2016-08-081486068332.1 ppb
2016-08-081486070138.1 ppb
2016-08-081486070732.1 ppb
2016-08-081486067140.4 ppb
2016-09-121503338124.3 ppb
2016-10-131518670813.7 ppb
2016-11-091532938348.4 ppb
2016-11-091532939556.0 ppb
2016-11-091532935937.5 ppb
2016-11-091532937739.5 ppb
2016-11-091532940150.1 ppb
2016-11-091532936551.2 ppb
2016-11-091532937156.6 ppb
2016-11-091532938939.9 ppb
2016-12-051547472326.7 ppb
2017-01-111561759151.4 ppb
2017-02-081575453013.2 ppb
2017-02-081575454239.4 ppb
2017-02-081575453614.3 ppb
2017-02-081575451546.5 ppb
2017-02-081575455437.2 ppb
2017-02-081575454830.1 ppb
2017-02-081575452411.7 ppb
2017-02-081575450923.2 ppb
2017-03-061589536065.4 ppb
2017-04-041604919059.1 ppb
2017-05-101621128845.6 ppb
2017-05-101621126476.1 ppb
2017-05-101621127042.2 ppb
2017-05-101621128295.1 ppb
2017-05-101621125884.0 ppb
2017-05-101621124676.6 ppb
2017-05-101621125241.3 ppb
2017-05-101621127668.4 ppb
2017-06-051637204776.2 ppb
2017-07-061652282837.4 ppb
2017-08-101668301093.5 ppb
2017-08-101668298037.4 ppb
2017-08-101668300451.0 ppb
2017-08-101668299249.1 ppb
2017-08-101668299850.1 ppb
2017-08-101668297352.1 ppb
2017-08-101668297954.8 ppb
2017-08-101668299158.6 ppb
2017-09-111683793623.9 ppb
2017-10-041683804222.3 ppb
2017-11-091712307448.3 ppb
2017-11-091712309269.6 ppb
2017-11-091712306837.0 ppb
2017-11-091712309830.3 ppb
2017-11-091712308056.2 ppb
2017-11-091712308672.3 ppb
2017-11-091712306246.3 ppb
2017-11-091712310446.9 ppb
2017-11-291712325821.7 ppb
2017-11-291712325928.1 ppb
2017-11-291712326026.2 ppb
2017-12-041712326634.3 ppb