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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of Chino Hills

Monochloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

162

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.24 ppb176ND - 4.90 ppb
20155.39 ppb3225ND - 16.0 ppb
20160.248 ppb251ND - 6.20 ppb
2017ND320ND
20181.09 ppb247ND - 4.30 ppb
2019ND320ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 53 ppb

The EWG Health Guideline of 53 ppb for monochloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.. This health guideline protects against system toxicity.

ppb = parts per billion

All test results

Date Lab ID Result
2014-05-224790-601-10052.40 ppb
2014-05-224790-602-09104.90 ppb
2014-05-224790-603-14503.60 ppb
2014-05-224790-604-10202.60 ppb
2014-05-224790-605-0930ND
2014-05-224790-606-15154.60 ppb
2014-05-224790-607-0950ND
2014-05-224790-608-1035ND
2014-08-124790-601-1000ND
2014-08-124790-602-0855ND
2014-08-124790-603-1200ND
2014-08-124790-604-1020ND
2014-08-124790-605-0920ND
2014-08-124790-606-1050ND
2014-08-124790-607-0935ND
2014-08-124790-608-1035ND
2014-11-134790-601-10202.90 ppb
2015-02-194790-601-1115ND
2015-02-194790-602-12007.30 ppb
2015-02-194790-603-0915ND
2015-02-194790-604-10452.30 ppb
2015-02-194790-605-1130ND
2015-02-194790-606-08453.50 ppb
2015-02-194790-607-1030ND
2015-02-194790-608-1100ND
2015-05-214790-601-10005.30 ppb
2015-05-214790-602-08305.10 ppb
2015-05-214790-603-10503.60 ppb
2015-05-214790-604-0915ND
2015-05-214790-605-10157.00 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
2015-08-274790-602-093516.0 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
2015-11-174790-601-10402.40 ppb
2015-11-174790-602-10209.30 ppb
2015-11-174790-603-12208.60 ppb
2015-11-174790-604-11156.70 ppb
2015-11-174790-605-10006.50 ppb
2015-11-174790-606-11505.90 ppb
2015-11-174790-607-09457.20 ppb
2015-11-174790-608-11056.10 ppb
2016-02-234790-601-10006.20 ppb
2016-05-264790-601-1145ND
2016-05-264790-602-1445ND
2016-05-264790-603-0845ND
2016-05-264790-604-0950ND
2016-05-264790-605-1110ND
2016-05-264790-606-1240ND
2016-05-264790-607-1130ND
2016-05-264790-608-1040ND
2016-08-259588-601-1225ND
2016-08-259588-602-1320ND
2016-08-259588-603-1410ND
2016-08-259588-604-1200ND
2016-08-259588-605-1255ND
2016-08-259588-606-1130ND
2016-08-259588-607-1240ND
2016-08-259588-608-1145ND
2016-11-289588-601-1125ND
2016-11-289588-602-1225ND
2016-11-289588-603-0945ND
2016-11-289588-604-1100ND
2016-11-289588-605-1250ND
2016-11-289588-606-1015ND
2016-11-289588-607-1315ND
2016-11-289588-608-1030ND
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
2017-05-269588-601-0950ND
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
2017-08-239588-601-1040ND
2017-08-239588-602-1220ND
2017-08-239588-603-0845ND
2017-08-239588-604-0950ND
2017-08-239588-605-1100ND
2017-08-239588-606-0915ND
2017-08-239588-607-1010ND
2017-08-239588-608-0935ND
2017-11-159588-601-0930ND
2017-11-159588-602-1040ND
2017-11-159588-603-0800ND
2017-11-159588-604-0900ND
2017-11-159588-605-1005ND
2017-11-159588-606-0830ND
2017-11-159588-607-0955ND
2017-11-159588-608-0845ND
2018-05-309588-601-13454.20 ppb
2018-05-309588-602-14103.80 ppb
2018-05-309588-603-1055ND
2018-05-309588-604-13304.30 ppb
2018-05-309588-605-10254.30 ppb
2018-05-309588-606-09203.50 ppb
2018-05-309588-607-10403.20 ppb
2018-05-309588-608-10002.90 ppb
2018-08-224790-601-0935ND
2018-08-224790-602-0900ND
2018-08-224790-603-1220ND
2018-08-224790-604-0955ND
2018-08-224790-605-1040ND
2018-08-224790-606-1015ND
2018-08-224790-607-1100ND
2018-08-224790-608-1005ND
2018-11-154790-601-0920ND
2018-11-154790-602-1015ND
2018-11-154790-603-0800ND
2018-11-154790-604-0910ND
2018-11-154790-605-0945ND
2018-11-154790-606-0830ND
2018-11-154790-607-0930ND
2018-11-154790-608-0900ND
2019-02-134790-601-0940ND
2019-02-134790-602-1040ND
2019-02-134790-603-0835ND
2019-02-134790-604-0930ND
2019-02-134790-605-1000ND
2019-02-134790-606-0900ND
2019-02-134790-607-0950ND
2019-02-134790-608-0920ND
2019-05-094790-601-1050ND
2019-05-094790-602-1000ND
2019-05-094790-603-1345ND
2019-05-094790-604-1115ND
2019-05-094790-605-1040ND
2019-05-094790-606-1300ND
2019-05-094790-607-1105ND
2019-05-304790-608-1250ND
2019-08-284790-601-1120ND
2019-08-284790-602-1005ND
2019-08-284790-603-0915ND
2019-08-284790-604-1135ND
2019-08-284790-605-1030ND
2019-08-284790-606-1215ND
2019-08-284790-607-1105ND
2019-08-284790-608-1155ND
2019-11-204790-601-1115ND
2019-11-204790-602-1300ND
2019-11-204790-603-1000ND
2019-11-204790-604-1055ND
2019-11-204790-605-1215ND
2019-11-204790-606-1025ND
2019-11-204790-607-1130ND
2019-11-204790-608-1040ND