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EWG's Tap Water Database — 2019 UPDATE

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Haloacetic acids (HAA5)

City of Chino Hills

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.

 

147

Samples

0

Samples exceeding legal limit (MCL)

105

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20123.38 ppb2412ND - 11.0 ppb
20131.74 ppb169ND - 3.80 ppb
20145.69 ppb1715ND - 11.0 ppb
20158.38 ppb3230ND - 18.0 ppb
20165.08 ppb2523ND - 13.0 ppb
20178.00 ppb3316ND - 8.00 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 on-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
2012-05-224790-601-0915ND
2012-05-224790-602-1025ND
2012-05-224790-603-1215ND
2012-05-224790-604-1000ND
2012-05-224790-605-1030ND
2012-05-224790-606-0835ND
2012-05-224790-607-1045ND
2012-05-224790-608-0950ND
2012-08-234790-601-0900ND
2012-08-234790-602-100011.0 ppb
2012-08-234790-603-08008.70 ppb
2012-08-234790-604-08453.80 ppb
2012-08-234790-605-0915ND
2012-08-234790-606-081510.00 ppb
2012-08-234790-607-093010.00 ppb
2012-08-234790-608-08305.60 ppb
2012-11-204790-601-0900ND
2012-11-204790-602-10308.30 ppb
2012-11-204790-603-08456.90 ppb
2012-11-204790-604-09453.80 ppb
2012-11-204790-605-1015ND
2012-11-204790-606-09153.70 ppb
2012-11-204790-607-10006.70 ppb
2012-11-204790-608-09302.50 ppb
2013-02-214790-601-1100ND
2013-02-214790-602-11402.30 ppb
2013-02-214790-603-10302.20 ppb
2013-02-214790-604-1045ND
2013-02-214790-605-11153.10 ppb
2013-02-214790-606-1015ND
2013-02-214790-607-0945ND
2013-02-214790-608-1000ND
2013-06-064790-601-08303.50 ppb
2013-06-064790-602-07303.60 ppb
2013-06-064790-603-09153.80 ppb
2013-06-064790-604-0815ND
2013-06-064790-605-08453.20 ppb
2013-06-064790-606-0745ND
2013-06-064790-607-09003.40 ppb
2013-06-064790-608-08002.80 ppb
2014-05-224790-601-10057.00 ppb
2014-05-224790-602-091010.00 ppb
2014-05-224790-603-14508.50 ppb
2014-05-224790-604-10207.10 ppb
2014-05-224790-605-09303.40 ppb
2014-05-224790-606-15158.80 ppb
2014-05-224790-607-09503.00 ppb
2014-05-224790-608-10352.70 ppb
2014-08-124790-601-10005.50 ppb
2014-08-124790-602-085511.0 ppb
2014-08-124790-603-12008.70 ppb
2014-08-124790-604-10203.00 ppb
2014-08-124790-605-0920ND
2014-08-124790-606-1050ND
2014-08-124790-607-09357.70 ppb
2014-08-124790-608-10353.80 ppb
2014-11-134790-601-10206.50 ppb
2015-02-194790-601-111512.0 ppb
2015-02-194790-602-120014.0 ppb
2015-02-194790-603-09159.10 ppb
2015-02-194790-604-10457.20 ppb
2015-02-194790-605-11309.60 ppb
2015-02-194790-606-08459.00 ppb
2015-02-194790-607-10308.90 ppb
2015-02-194790-608-11006.20 ppb
2015-05-214790-601-10007.20 ppb
2015-05-214790-602-08305.10 ppb
2015-05-214790-603-10504.70 ppb
2015-05-214790-604-0915ND
2015-05-214790-605-10158.40 ppb
2015-05-214790-606-09304.10 ppb
2015-05-214790-607-1030ND
2015-05-214790-608-09002.10 ppb
2015-08-274790-601-10459.40 ppb
2015-08-274790-602-093518.0 ppb
2015-08-274790-603-081011.0 ppb
2015-08-274790-604-11259.40 ppb
2015-08-274790-605-10107.10 ppb
2015-08-274790-606-08308.10 ppb
2015-08-274790-607-08508.90 ppb
2015-08-274790-608-10309.50 ppb
2015-11-174790-601-10406.00 ppb
2015-11-174790-602-102013.0 ppb
2015-11-174790-603-122011.0 ppb
2015-11-174790-604-11159.60 ppb
2015-11-174790-605-100010.00 ppb
2015-11-174790-606-11508.60 ppb
2015-11-174790-607-094511.0 ppb
2015-11-174790-608-11059.80 ppb
2016-02-234790-601-100012.0 ppb
2016-05-264790-601-11453.50 ppb
2016-05-264790-602-14458.20 ppb
2016-05-264790-603-08456.40 ppb
2016-05-264790-604-09505.50 ppb
2016-05-264790-605-11105.60 ppb
2016-05-264790-606-12403.60 ppb
2016-05-264790-607-11307.30 ppb
2016-05-264790-608-10403.80 ppb
2016-08-259588-601-12252.90 ppb
2016-08-259588-602-13205.20 ppb
2016-08-259588-603-14101.80 ppb
2016-08-259588-604-1200ND
2016-08-259588-605-12551.90 ppb
2016-08-259588-606-11301.10 ppb
2016-08-259588-607-12402.90 ppb
2016-08-259588-608-11451.80 ppb
2016-11-289588-601-11255.50 ppb
2016-11-289588-602-122513.0 ppb
2016-11-289588-603-0945ND
2016-11-289588-604-11006.50 ppb
2016-11-289588-605-125013.0 ppb
2016-11-289588-606-10157.70 ppb
2016-11-289588-607-13152.20 ppb
2016-11-289588-608-10305.60 ppb
2017-02-239588-601-0925ND
2017-02-239588-602-0850ND
2017-02-239588-603-1300ND
2017-02-239588-604-1040ND
2017-02-239588-605-0910ND
2017-02-239588-606-1125ND
2017-02-239588-607-1020ND
2017-02-239588-608-1100ND
2017-05-269588-601-09501.30 ppb
2017-05-269588-602-0840ND
2017-05-269588-603-1215ND
2017-05-269588-604-1015ND
2017-05-269588-605-0920ND
2017-05-269588-606-1140ND
2017-05-269588-607-0935ND
2017-05-269588-608-1030ND
2017-06-018.00 ppb*
2017-08-239588-601-10401.50 ppb
2017-08-239588-602-12205.30 ppb
2017-08-239588-603-0845ND
2017-08-239588-604-09502.60 ppb
2017-08-239588-605-11002.70 ppb
2017-08-239588-606-09152.60 ppb
2017-08-239588-607-10103.40 ppb
2017-08-239588-608-09352.30 ppb
2017-11-159588-601-09304.00 ppb
2017-11-159588-602-10408.20 ppb
2017-11-159588-603-0800ND
2017-11-159588-604-09003.90 ppb
2017-11-159588-605-10056.20 ppb
2017-11-159588-606-08303.90 ppb
2017-11-159588-607-09551.60 ppb
2017-11-159588-608-08454.10 ppb

* Sample result is taken from the system's CCR report.