Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Haloacetic acids (HAA5)

City of Mount Holly

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

 

100

Samples

0

Samples exceeding legal limit (MCL)

100

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201419.4 ppb202013.0 ppb - 25.0 ppb
201521.3 ppb161614.0 ppb - 26.0 ppb
201623.9 ppb161614.0 ppb - 34.0 ppb
201723.7 ppb16169.40 ppb - 39.0 ppb
201822.9 ppb161612.0 ppb - 33.0 ppb
201930.5 ppb161614.3 ppb - 51.0 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
2014-02-1092189413002-219.0 ppb
2014-02-1092189413003-218.0 ppb
2014-02-1092189413004-214.0 ppb
2014-02-1092189413001-219.0 ppb
2014-05-0692200309002TTH-220.0 ppb
2014-05-0692200309004DIS-215.6 ppb
2014-05-0692200309003DIS-223.0 ppb
2014-05-0692200309002DIS-220.0 ppb
2014-05-0692200309001DIS-224.0 ppb
2014-05-0692200309004TTH-216.0 ppb
2014-05-0692200309003TTH-223.0 ppb
2014-05-0692200309001TTH-225.0 ppb
2014-08-1392213211004TTH-223.0 ppb
2014-08-1392213211003TTH-222.0 ppb
2014-08-1392213211002TTH-213.0 ppb
2014-08-1392213211001TTH-220.0 ppb
2014-11-1292225563001TTH-218.0 ppb
2014-11-1292225563004TTH-217.0 ppb
2014-11-1292225563003TTH-221.0 ppb
2014-11-1292225563002TTH-218.0 ppb
2015-02-1117.0 ppb
2015-02-1114.0 ppb
2015-02-1118.0 ppb
2015-02-1119.0 ppb
2015-05-1324.0 ppb
2015-05-1324.0 ppb
2015-05-1326.0 ppb
2015-05-1319.0 ppb
2015-08-1225.0 ppb
2015-08-1223.0 ppb
2015-08-1225.0 ppb
2015-08-1218.0 ppb
2015-11-1120.0 ppb
2015-11-1120.0 ppb
2015-11-1123.0 ppb
2015-11-1126.0 ppb
2016-02-1192286342004TTH-223.0 ppb
2016-02-1192286342005TTH-223.0 ppb
2016-02-1192286342006TTH-220.0 ppb
2016-02-1192286342007TTH-214.0 ppb
2016-05-1192297391001TTH-234.0 ppb
2016-05-1192297391002TTH-227.0 ppb
2016-05-1192297391003TTH-232.0 ppb
2016-05-1192297391004TTH-221.0 ppb
2016-08-1092308594004TTH-220.0 ppb
2016-08-1092308594003TTH-230.0 ppb
2016-08-1092308594002TTH-230.0 ppb
2016-08-1092308594001TTH-228.0 ppb
2016-11-0392318634006TTH-224.0 ppb
2016-11-0392318634005TTH-224.0 ppb
2016-11-0392318634004TTH-218.0 ppb
2016-11-0392318634007TTH-214.0 ppb
2017-02-0892329386004TTH26.0 ppb
2017-02-0892329386005TTH24.0 ppb
2017-02-0892329386006TTH26.0 ppb
2017-02-0892329386007TTH19.0 ppb
2017-05-0892339758003TTH26.0 ppb
2017-05-0892339758004TTH19.0 ppb
2017-05-0892339758005TTH25.0 ppb
2017-05-0892339758006TTH18.0 ppb
2017-08-0992351086003TTH39.0 ppb
2017-08-0992351086006TTH18.0 ppb
2017-08-0992351086005TTH36.0 ppb
2017-08-0992351086004TTH34.0 ppb
2017-11-1792364017002TTH22.0 ppb
2017-11-1792364017003TTH17.0 ppb
2017-11-1792364017004TTH21.0 ppb
2017-11-1792364017005TTH9.40 ppb
2018-02-1392373387006TTH 12.0 ppb
2018-02-1392373387005TTH 20.0 ppb
2018-02-1392373387004TTH 19.0 ppb
2018-02-1392373387003TTH 20.0 ppb
2018-05-1592385058005TTH 33.0 ppb
2018-05-1592385058004TTH 22.0 ppb
2018-05-1592385058003TTH 25.0 ppb
2018-05-1892385352001TTH 15.0 ppb
2018-08-0792394976004TTH 28.0 ppb
2018-08-0792394976003TTH 33.0 ppb
2018-08-0792394976002TTH 18.0 ppb
2018-08-0792394976001TTH 33.0 ppb
2018-11-1492407592002TTH 30.0 ppb
2018-11-1492407592003TTH 20.0 ppb
2018-11-1492407592004TTH 22.0 ppb
2018-11-1492407592005TTH 16.0 ppb
2019-02-1392417734001_377026.0 ppb
2019-02-1392417734002_377031.0 ppb
2019-02-1392417734003_377026.0 ppb
2019-02-1392417734004_377017.0 ppb
2019-05-0792428278002_377033.0 ppb
2019-05-0792428278004_377022.0 ppb
2019-05-0792428278003_377037.0 ppb
2019-05-0792428278001_377040.0 ppb
2019-08-1492441570002_377045.0 ppb
2019-08-1492441570004_377028.0 ppb
2019-08-1492441570003_377051.0 ppb
2019-08-1492441570001_377041.0 ppb
2019-11-0592452455004_377024.0 ppb
2019-11-0592452455003_377026.0 ppb
2019-11-0592452455002_377014.3 ppb
2019-11-0592452455001_377026.0 ppb