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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Parlier

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

 

63

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND120ND
2015ND120ND
2016ND160ND
2017ND160ND
2018ND50ND
2019ND20ND

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
2014-01-155810-903-0910ND
2014-01-155810-902-1147ND
2014-01-155810-901-0830ND
2014-01-155810-900-0848ND
2014-04-165810-903-1012ND
2014-04-165810-902-1130ND
2014-04-165810-901-1140ND
2014-04-165810-900-1105ND
2014-07-165810-902-1144ND
2014-07-165810-901-1118ND
2014-07-165810-900-1010ND
2014-07-185810-903-1158ND
2015-03-305810-902-1245ND
2015-03-305810-903-1310ND
2015-03-305810-901-1230ND
2015-03-305810-900-1215ND
2015-07-155810-900-1100ND
2015-07-155810-901-1200ND
2015-07-225810-903-1130ND
2015-07-225810-902-1200ND
2015-10-075810-900-1600ND
2015-10-075810-901-1530ND
2015-10-215810-903-1310ND
2015-10-215810-902-1330ND
2016-01-135810-900-1114ND
2016-01-135810-903-1132ND
2016-01-135810-901-1220ND
2016-01-205810-902-1410ND
2016-04-065810-901-1334ND
2016-04-065810-900-1303ND
2016-04-135810-902-1328ND
2016-04-135810-903-1258ND
2016-07-065810-902-1245ND
2016-07-135810-900-1210ND
2016-07-135810-903-1150ND
2016-07-135810-901-1125ND
2016-10-055810-900-1500ND
2016-10-055810-903-1450ND
2016-10-055810-901-1425ND
2016-10-125810-902-1245ND
2017-01-045810-902-1335ND
2017-01-115810-900-1235ND
2017-01-115810-903-1220ND
2017-01-115810-901-1150ND
2017-04-055810-900-1325ND
2017-04-055810-903-1310ND
2017-04-055810-901-1240ND
2017-04-125810-902-1125ND
2017-07-055810-902-1340ND
2017-07-125810-901-1240ND
2017-07-125810-900-1210ND
2017-07-125810-903-1220ND
2017-10-045810-903-1230ND
2017-10-045810-902-1240ND
2017-10-045810-901-1210ND
2017-10-115810-902-1025ND
2018-01-035810-903-1240ND
2018-01-035810-902-1220ND
2018-01-105810-900-1220ND
2018-01-105810-901-1255ND
2018-10-245810-902-1500ND
2019-01-095810-901-1100ND
2019-12-315810-902-1015ND