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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

Riverside Highland Water Company

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

 

72

Samples

0

Samples exceeding legal limit (MCL)

14

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20142.33 ppb86ND - 4.60 ppb
20150.744 ppb92ND - 4.30 ppb
20160.250 ppb162ND - 2.00 ppb
20170.783 ppb123ND - 4.00 ppb
20180.192 ppb121ND - 2.30 ppb
2019ND150ND

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
2014-07-024790-604-13342.70 ppb
2014-07-024790-603-13002.80 ppb
2014-07-024790-602-13564.60 ppb
2014-07-024790-601-13142.70 ppb
2014-10-064790-604-14403.00 ppb
2014-10-064790-603-1419ND
2014-10-064790-602-1400ND
2014-10-064790-601-13202.80 ppb
2015-01-064790-601-09362.40 ppb
2015-01-064790-604-1013ND
2015-01-064790-603-0906ND
2015-01-064790-602-1036ND
2015-04-024790-601-0853ND
2015-10-024790-601-1221ND
2015-10-024790-604-12434.30 ppb
2015-10-024790-603-1319ND
2015-10-024790-602-1304ND
2016-01-054790-602-0814ND
2016-01-054790-603-0749ND
2016-01-054790-604-08392.00 ppb
2016-01-054790-601-0906ND
2016-04-054790-601-1053ND
2016-04-054790-602-1112ND
2016-04-054790-603-1245ND
2016-04-054790-604-13022.00 ppb
2016-07-074790-604-1034ND
2016-07-074790-603-1021ND
2016-07-074790-601-0950ND
2016-07-074790-602-1005ND
2016-10-054790-604-0955ND
2016-10-054790-601-1041ND
2016-10-054790-602-1009ND
2016-10-054790-603-0930ND
2017-04-054790-603-0813ND
2017-04-054790-601-0846ND
2017-04-054790-604-09012.10 ppb
2017-04-054790-602-0831ND
2017-07-055810-604-1055ND
2017-07-055810-603-0850ND
2017-07-055810-601-09553.30 ppb
2017-07-055810-602-1041ND
2017-10-045810-604-1058ND
2017-10-045810-603-1012ND
2017-10-045810-601-09374.00 ppb
2017-10-045810-602-0955ND
2018-01-055810-603-0946ND
2018-01-055810-601-10392.30 ppb
2018-01-055810-604-1231ND
2018-01-105810-602-0946ND
2018-07-104790-603-1010ND
2018-07-104790-601-1236ND
2018-07-104790-602-1041ND
2018-07-104790-604-1300ND
2018-10-094790-601-1019ND
2018-10-094790-603-1057ND
2018-10-094790-602-1036ND
2018-10-094790-604-0956ND
2019-01-034790-603-1055ND
2019-01-034790-601-1010ND
2019-01-034790-602-1033ND
2019-04-084790-601-1416ND
2019-04-084790-604-1456ND
2019-04-084790-602-1348ND
2019-04-084790-603-1309ND
2019-07-034790-604-1441ND
2019-07-034790-602-1339ND
2019-07-034790-603-1310ND
2019-07-034790-601-1353ND
2019-10-024790-604-1246ND
2019-10-024790-602-1000ND
2019-10-024790-601-1024ND
2019-10-024790-603-0931ND