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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Elizabeth City

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

 

104

Samples

0

Samples exceeding legal limit (MCL)

100

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201418.0 ppb2422ND - 42.0 ppb
201525.6 ppb1615ND - 60.0 ppb
201617.9 ppb16163.20 ppb - 40.0 ppb
201720.2 ppb1615ND - 40.0 ppb
201828.5 ppb16163.50 ppb - 40.0 ppb
201925.6 ppb16163.00 ppb - 42.0 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
2014-01-0692185427001-23.80 ppb
2014-01-0692185427002-225.0 ppb
2014-01-0692185427003-229.0 ppb
2014-01-0692185427004-22.40 ppb
2014-04-0792196508001TTH-224.0 ppb
2014-04-0792196508001DIS-224.0 ppb
2014-04-0792196509001DIS-217.0 ppb
2014-04-0792196510001DIS-222.0 ppb
2014-04-0792196511001DIS-224.0 ppb
2014-04-0792196509001TTH-216.0 ppb
2014-04-0792196510001TTH-222.0 ppb
2014-04-0792196511001TTH-224.0 ppb
2014-07-0892208495001DIS-27.00 ppb
2014-07-0892208495002DIS-233.0 ppb
2014-07-0892208495003DIS-2ND
2014-07-0892208495004DIS-225.0 ppb
2014-07-0892208495001TTH-27.00 ppb
2014-07-0892208495002TTH-233.0 ppb
2014-07-0892208495003TTH-2ND
2014-07-0892208495004TTH-225.0 ppb
2014-10-0692220286001TTH-210.00 ppb
2014-10-0692220286002TTH-215.0 ppb
2014-10-0692220286003TTH-242.0 ppb
2014-10-0692220286004TTH-21.10 ppb
2015-01-0815.0 ppb
2015-01-086.80 ppb
2015-01-0837.0 ppb
2015-01-082.60 ppb
2015-04-0620.0 ppb
2015-04-0632.0 ppb
2015-04-0629.0 ppb
2015-04-0641.0 ppb
2015-07-068.80 ppb
2015-07-0614.0 ppb
2015-07-0647.0 ppb
2015-07-06ND
2015-10-0520.0 ppb
2015-10-0531.0 ppb
2015-10-0545.0 ppb
2015-10-0560.0 ppb
2016-01-0592282037001TTH-222.0 ppb
2016-01-0592282037002TTH-217.0 ppb
2016-01-0592282037003TTH-240.0 ppb
2016-01-0592282037004TTH-23.20 ppb
2016-04-0592292662001TTH-213.0 ppb
2016-04-0592292662002TTH-216.0 ppb
2016-04-0592292662003TTH-229.0 ppb
2016-04-0592292662004TTH-219.0 ppb
2016-07-1192304772001TTH-26.20 ppb
2016-07-1192304772002TTH-223.0 ppb
2016-07-1192304772003TTH-227.0 ppb
2016-07-1192304772004TTH-211.0 ppb
2016-10-1292315997001TTH-27.20 ppb
2016-10-1292315997002TTH-217.0 ppb
2016-10-1292315997003TTH-232.0 ppb
2016-10-1292315997004TTH-24.20 ppb
2017-01-1092325930001TTH18.0 ppb
2017-01-1092325930002TTH21.0 ppb
2017-01-1092325930003TTH36.0 ppb
2017-01-1092325930004TTH32.0 ppb
2017-04-1092336747001TTH30.0 ppb
2017-04-1092336747002TTH38.0 ppb
2017-04-1092336747003TTH40.0 ppb
2017-04-1092336747004TTH18.0 ppb
2017-07-1092347220001TTH26.0 ppb
2017-07-1092347220002TTH11.0 ppb
2017-07-1092347220003TTH7.40 ppb
2017-07-1092347220004TTH3.30 ppb
2017-10-1092358707001TTH5.50 ppb
2017-10-1092358707002TTH11.0 ppb
2017-10-1092358707003TTH26.0 ppb
2017-10-1092358707004TTHND
2018-01-2492370843001TTH 31.0 ppb
2018-01-2492370843002TTH 40.0 ppb
2018-01-2492370843003TTH 32.0 ppb
2018-01-2492370843004TTH 32.0 ppb
2018-04-2592382473001TTH 26.0 ppb
2018-04-2592382473002TTH 33.0 ppb
2018-04-2592382473003TTH 40.0 ppb
2018-04-2592382473004TTH 28.0 ppb
2018-07-1992392766002TTH 24.0 ppb
2018-07-1992392766003TTH 30.0 ppb
2018-07-1992392766004TTH 5.10 ppb
2018-07-3092393737001TTH 27.0 ppb
2018-10-1892404170001TTH 35.0 ppb
2018-10-1892404170002TTH 33.0 ppb
2018-10-1892404170003TTH 37.0 ppb
2018-10-1892404170004TTH 3.50 ppb
2019-01-0492412949001_377023.0 ppb
2019-01-0492412949002_377024.0 ppb
2019-01-0492412949003_377032.0 ppb
2019-01-0492412949004_37709.60 ppb
2019-04-1592425913001_377030.0 ppb
2019-04-1592425913002_377039.0 ppb
2019-04-1592425913003_377042.0 ppb
2019-04-1592425913004_377020.0 ppb
2019-07-1592436885001_377034.0 ppb
2019-07-1592436885002_377022.0 ppb
2019-07-1592436885003_377032.0 ppb
2019-07-1592436885004_37705.40 ppb
2019-10-1492449575001_377034.0 ppb
2019-10-1492449575002_377030.0 ppb
2019-10-1492449575003_377030.0 ppb
2019-10-1492449575004_37703.00 ppb