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EWG's Tap Water Database — 2021 UPDATE

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Haloacetic acids (HAA5)

City of Chino

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

 

176

Samples

0

Samples exceeding legal limit (MCL)

142

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20144.72 ppb3224ND - 13.0 ppb
20153.14 ppb3216ND - 12.0 ppb
20166.62 ppb2423ND - 16.0 ppb
20175.15 ppb3223ND - 12.0 ppb
20188.07 ppb24243.20 ppb - 13.0 ppb
20197.87 ppb32321.70 ppb - 13.0 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
2014-01-169590-601-084412.0 ppb
2014-01-169590-602-081910.00 ppb
2014-01-169590-603-085513.0 ppb
2014-01-169590-604-083612.0 ppb
2014-01-169590-605-08079.30 ppb
2014-01-169590-606-075610.00 ppb
2014-01-169590-607-082711.0 ppb
2014-01-169590-608-074810.00 ppb
2014-04-229590-601-08434.70 ppb
2014-04-229590-602-08253.30 ppb
2014-04-229590-603-09176.10 ppb
2014-04-229590-604-08385.10 ppb
2014-04-229590-605-0807ND
2014-04-229590-606-0855ND
2014-04-229590-607-08334.60 ppb
2014-04-229590-608-11035.90 ppb
2014-07-179590-601-08142.60 ppb
2014-07-179590-602-0753ND
2014-07-179590-603-08244.60 ppb
2014-07-179590-604-08082.60 ppb
2014-07-179590-605-0744ND
2014-07-179590-606-0732ND
2014-07-179590-607-08002.80 ppb
2014-07-179590-608-07234.20 ppb
2014-10-169590-601-09423.70 ppb
2014-10-169590-602-0854ND
2014-10-169590-603-09594.70 ppb
2014-10-169590-604-09203.00 ppb
2014-10-169590-605-0841ND
2014-10-169590-606-0828ND
2014-10-169590-607-09062.80 ppb
2014-10-169590-608-08152.90 ppb
2015-01-149590-601-08002.00 ppb
2015-01-149590-602-0840ND
2015-01-149590-603-07358.70 ppb
2015-01-149590-604-0830ND
2015-01-149590-605-0900ND
2015-01-149590-606-0850ND
2015-01-149590-607-08152.00 ppb
2015-01-149590-608-09105.00 ppb
2015-04-099590-601-0912ND
2015-04-099590-602-0842ND
2015-04-099590-603-09263.20 ppb
2015-04-099590-604-0902ND
2015-04-099590-605-0830ND
2015-04-099590-606-0815ND
2015-04-099590-607-08522.00 ppb
2015-04-099590-608-08062.60 ppb
2015-07-169590-601-08508.20 ppb
2015-07-169590-602-08178.00 ppb
2015-07-169590-603-090411.0 ppb
2015-07-169590-604-08378.20 ppb
2015-07-169590-605-08056.90 ppb
2015-07-169590-606-07523.70 ppb
2015-07-169590-607-08308.60 ppb
2015-07-169590-608-07418.30 ppb
2015-10-159590-601-0902ND
2015-10-159590-602-0824ND
2015-10-159590-603-091412.0 ppb
2015-10-159590-604-0841ND
2015-10-159590-605-0811ND
2015-10-159590-606-0801ND
2015-10-159590-607-0832ND
2015-10-159590-608-0752ND
2016-01-279590-601-08456.50 ppb
2016-01-279590-602-08215.00 ppb
2016-01-279590-603-09047.10 ppb
2016-01-279590-604-08376.00 ppb
2016-01-279590-605-08094.60 ppb
2016-01-279590-606-08002.40 ppb
2016-01-279590-607-08305.60 ppb
2016-01-279590-608-07435.70 ppb
2016-04-219590-601-09209.60 ppb
2016-04-219590-602-083910.00 ppb
2016-04-219590-603-093216.0 ppb
2016-04-219590-604-085811.0 ppb
2016-04-219590-605-08219.30 ppb
2016-04-219590-606-08178.80 ppb
2016-04-219590-607-084710.00 ppb
2016-04-219590-608-080911.0 ppb
2016-10-209590-601-08234.50 ppb
2016-10-209590-602-07542.60 ppb
2016-10-209590-603-08369.30 ppb
2016-10-209590-604-08124.20 ppb
2016-10-209590-605-0743ND
2016-10-209590-606-07282.30 ppb
2016-10-209590-607-08034.10 ppb
2016-10-209590-608-07213.20 ppb
2017-01-199590-601-0851ND
2017-01-199590-602-0814ND
2017-01-199590-603-0903ND
2017-01-199590-604-0828ND
2017-01-199590-605-0802ND
2017-01-199590-606-0747ND
2017-01-199590-607-0821ND
2017-01-199590-608-0738ND
2017-04-209590-601-08558.60 ppb
2017-04-209590-602-08266.80 ppb
2017-04-209590-603-090711.0 ppb
2017-04-209590-604-084610.00 ppb
2017-04-209590-605-081510.00 ppb
2017-04-209590-606-08003.60 ppb
2017-04-209590-607-083610.00 ppb
2017-04-209590-608-07529.80 ppb
2017-07-209590-601-09478.40 ppb
2017-07-209590-602-084812.0 ppb
2017-07-209590-603-10086.90 ppb
2017-07-209590-604-09378.70 ppb
2017-07-209590-605-08292.30 ppb
2017-07-209590-606-08177.60 ppb
2017-07-209590-607-09272.60 ppb
2017-07-209590-608-08077.50 ppb
2017-10-269590-601-08506.10 ppb
2017-10-269590-602-08024.30 ppb
2017-10-269590-603-09088.40 ppb
2017-10-269590-604-08305.90 ppb
2017-10-269590-605-0746ND
2017-10-269590-606-07323.50 ppb
2017-10-269590-607-08195.40 ppb
2017-10-269590-608-07225.40 ppb
2018-02-089590-605-08584.00 ppb
2018-02-089590-606-08428.30 ppb
2018-02-089590-608-08308.70 ppb
2018-03-079590-601-083412.0 ppb
2018-03-079590-602-07268.10 ppb
2018-03-079590-603-082013.0 ppb
2018-03-079590-604-080012.0 ppb
2018-03-079590-607-07409.50 ppb
2018-05-169590-601-080511.0 ppb
2018-05-169590-602-073911.0 ppb
2018-05-169590-603-082110.00 ppb
2018-05-169590-604-075612.0 ppb
2018-05-169590-605-07267.90 ppb
2018-05-169590-606-07119.70 ppb
2018-05-169590-607-074811.0 ppb
2018-05-169590-608-070112.0 ppb
2018-10-189588-601-08354.80 ppb
2018-10-189588-602-09253.90 ppb
2018-10-189588-603-10005.20 ppb
2018-10-189588-605-10353.20 ppb
2018-10-189588-606-10503.70 ppb
2018-10-189588-607-09104.30 ppb
2018-10-189588-608-11004.40 ppb
2018-10-239588-604-07303.90 ppb
2019-01-229588-601-08008.20 ppb
2019-01-229588-602-09504.30 ppb
2019-01-229588-603-082012.0 ppb
2019-01-229588-604-07457.40 ppb
2019-01-229588-605-09354.00 ppb
2019-01-229588-606-09204.80 ppb
2019-01-229588-607-08355.10 ppb
2019-01-229588-608-09001.70 ppb
2019-04-309588-601-075013.0 ppb
2019-04-309588-602-10359.40 ppb
2019-04-309588-603-085013.0 ppb
2019-04-309588-604-073513.0 ppb
2019-04-309588-605-10258.40 ppb
2019-04-309588-606-10157.40 ppb
2019-04-309588-607-100012.0 ppb
2019-04-309588-608-105512.0 ppb
2019-07-029588-601-08179.10 ppb
2019-07-029588-602-07387.50 ppb
2019-07-029588-603-08358.70 ppb
2019-07-029588-604-08029.60 ppb
2019-07-029588-605-07235.30 ppb
2019-07-029588-606-07077.10 ppb
2019-07-029588-607-07499.10 ppb
2019-07-029588-608-06558.50 ppb
2019-10-159588-601-10157.30 ppb
2019-10-159588-602-09496.10 ppb
2019-10-159588-603-10407.30 ppb
2019-10-159588-604-10077.40 ppb
2019-10-159588-605-09375.00 ppb
2019-10-159588-606-09264.90 ppb
2019-10-159588-607-09376.80 ppb
2019-10-159588-608-09176.40 ppb