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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Delano

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

 

146

Samples

0

Samples exceeding legal limit (MCL)

36

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.06 ppb164ND - 6.80 ppb
20150.475 ppb162ND - 5.60 ppb
20161.43 ppb185ND - 9.40 ppb
20171.31 ppb328ND - 10.00 ppb
20180.971 ppb347ND - 10.00 ppb
20193.26 ppb3010ND - 47.0 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
2014-01-065810-900-1040ND
2014-01-065810-901-1100ND
2014-01-065810-902-1015ND
2014-01-065810-903-0915ND
2014-04-075810-900-0845ND
2014-04-075810-901-0835ND
2014-04-075810-902-0900ND
2014-04-075810-903-0810ND
2014-07-075810-900-11153.10 ppb
2014-07-075810-901-12006.80 ppb
2014-07-075810-902-11402.60 ppb
2014-07-075810-903-1045ND
2014-10-095810-900-1500ND
2014-10-095810-901-14104.50 ppb
2014-10-095810-902-1520ND
2014-10-095810-903-1545ND
2015-01-055810-900-1130ND
2015-01-055810-901-10305.60 ppb
2015-01-055810-902-1100ND
2015-01-055810-903-1300ND
2015-04-065810-900-1410ND
2015-04-065810-901-11302.00 ppb
2015-04-065810-902-1345ND
2015-04-065810-903-1315ND
2015-07-065810-900-1015ND
2015-07-065810-901-0920ND
2015-07-065810-902-0950ND
2015-07-065810-903-0852ND
2015-10-065810-900-0900ND
2015-10-065810-901-0920ND
2015-10-065810-902-0845ND
2015-10-065810-903-0935ND
2016-01-055810-900-0830ND
2016-01-055810-901-08104.90 ppb
2016-01-055810-902-08452.80 ppb
2016-01-055810-903-0745ND
2016-04-055810-900-1000ND
2016-04-055810-901-1030ND
2016-04-055810-902-0915ND
2016-04-055810-903-0825ND
2016-07-065810-900-1240ND
2016-07-065810-901-13006.50 ppb
2016-07-065810-902-1215ND
2016-07-065810-903-1320ND
2016-10-045810-900-10359.40 ppb
2016-10-045810-901-1020ND
2016-10-045810-902-1050ND
2016-10-045810-903-11302.10 ppb
2016-12-135810-054-0920ND
2016-12-135810-055-0900ND
2017-01-035810-900-0908ND
2017-01-035810-901-10129.50 ppb
2017-01-035810-902-0946ND
2017-01-035810-903-0929ND
2017-01-105810-054-0950ND
2017-01-105810-055-1010ND
2017-02-075810-054-1045ND
2017-02-075810-055-1115ND
2017-03-145810-054-1005ND
2017-03-145810-055-1020ND
2017-04-045810-900-09153.30 ppb
2017-04-045810-901-10003.80 ppb
2017-04-045810-902-0935ND
2017-04-045810-903-1040ND
2017-04-115810-054-1000ND
2017-04-115810-055-1030ND
2017-05-185810-054-0930ND
2017-05-185810-055-0945ND
2017-06-135810-054-0940ND
2017-06-135810-055-0948ND
2017-07-035810-900-1100ND
2017-07-035810-901-081510.00 ppb
2017-07-035810-902-10253.50 ppb
2017-07-035810-903-08002.50 ppb
2017-07-115810-054-1045ND
2017-07-115810-055-1100ND
2017-08-155810-054-0945ND
2017-08-155810-055-0955ND
2017-10-035810-900-0900ND
2017-10-035810-901-10007.10 ppb
2017-10-035810-902-1045ND
2017-10-035810-903-08002.30 ppb
2018-01-035810-900-0942ND
2018-01-035810-901-10356.30 ppb
2018-01-035810-902-1010ND
2018-01-035810-903-1115ND
2018-02-215810-054-0815ND
2018-02-215810-055-0835ND
2018-03-135810-054-0850ND
2018-03-135810-055-0841ND
2018-04-035810-900-1030ND
2018-04-035810-901-11004.20 ppb
2018-04-035810-902-0940ND
2018-04-035810-903-1130ND
2018-04-115810-054-0950ND
2018-04-115810-055-1000ND
2018-05-145810-054-1107ND
2018-05-145810-055-1130ND
2018-06-195810-054-0753ND
2018-06-265810-055-1115ND
2018-07-035810-900-1045ND
2018-07-035810-901-11204.30 ppb
2018-07-035810-902-1100ND
2018-07-035810-903-11302.20 ppb
2018-07-175810-054-0935ND
2018-07-175810-055-0950ND
2018-08-145810-054-1010ND
2018-08-145810-055-1000ND
2018-09-115810-054-1100ND
2018-09-115810-055-1040ND
2018-10-025810-900-0940ND
2018-10-025810-901-10503.70 ppb
2018-10-025810-902-100010.00 ppb
2018-10-025810-903-08502.30 ppb
2018-10-165810-054-1015ND
2018-10-165810-055-1025ND
2019-01-025810-900-1105ND
2019-01-025810-901-1020ND
2019-01-025810-902-1050ND
2019-01-025810-903-0950ND
2019-01-225810-054-1115ND
2019-01-225810-055-1100ND
2019-02-125810-054-1050ND
2019-02-125810-055-1040ND
2019-03-125810-054-1045ND
2019-03-125810-054-1100ND
2019-04-025810-900-1020ND
2019-04-025810-901-10455.80 ppb
2019-04-025810-902-10102.10 ppb
2019-04-025810-903-1130ND
2019-07-025810-900-10357.70 ppb
2019-07-025810-901-11154.80 ppb
2019-07-025810-902-10559.90 ppb
2019-07-025810-903-10152.20 ppb
2019-08-085810-054-0830ND
2019-08-085810-055-0815ND
2019-09-035810-054-0943ND
2019-09-035810-055-0929ND
2019-10-015810-054-1110ND
2019-10-015810-055-1100ND
2019-10-015810-900-10403.40 ppb
2019-10-015810-901-095047.0 ppb
2019-10-015810-902-101512.0 ppb
2019-10-015810-903-09302.90 ppb
2019-12-105810-054-1110ND
2019-12-105810-055-1100ND