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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Boulder City

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.68 ppb1610ND - 3.10 ppb
20150.250 ppb162ND - 2.00 ppb
20160.556 ppb164ND - 2.30 ppb
2017ND160ND
20180.125 ppb161ND - 2.00 ppb
2019ND160ND

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
2014-01-0814010105-004ND
2014-01-0814010105-003ND
2014-01-0814010105-001ND
2014-01-0814010105-002ND
2014-04-1014040150-0012.30 ppb
2014-04-1014040150-0022.10 ppb
2014-04-1014040150-003ND
2014-04-1014040150-004ND
2014-07-1014070151-0012.80 ppb
2014-07-1014070151-0023.10 ppb
2014-07-1014070151-0033.00 ppb
2014-07-1014070151-0043.00 ppb
2014-10-0914100138-0022.30 ppb
2014-10-0914100138-0012.60 ppb
2014-10-0914100138-0042.70 ppb
2014-10-0914100138-0033.00 ppb
2015-01-0815010077-004ND
2015-01-0815010077-003ND
2015-01-0815010077-002ND
2015-01-0815010077-001ND
2015-04-0915040146-003ND
2015-04-0915040146-004ND
2015-04-0915040146-002ND
2015-04-0915040146-001ND
2015-07-0915070196-0032.00 ppb
2015-07-0915070196-002ND
2015-07-0915070196-001ND
2015-07-0915070196-0042.00 ppb
2015-10-2115100360-001ND
2015-10-2115100360-004ND
2015-10-2115100360-003ND
2015-10-2115100360-002ND
2016-01-1316010170-003ND
2016-01-1316010170-0042.20 ppb
2016-01-1316010170-002ND
2016-01-1316010170-001ND
2016-04-1216040164-0032.30 ppb
2016-04-1216040164-0022.10 ppb
2016-04-1216040164-001ND
2016-04-1216040164-0042.30 ppb
2016-07-12S1601211001ND
2016-07-12S1601211004ND
2016-07-12S1601211003ND
2016-07-12S1601211002ND
2016-10-10S1604653004ND
2016-10-10S1604653003ND
2016-10-10S1604653002ND
2016-10-10S1604653001ND
2017-01-12S1700105004ND
2017-01-12S1700105003ND
2017-01-12S1700105002ND
2017-01-12S1700105001ND
2017-04-11S1700489001ND
2017-04-11S1700489003ND
2017-04-11S1700489002ND
2017-04-11S1700489004ND
2017-07-12S1702354001ND
2017-07-12S1702354002ND
2017-07-12S1702354003ND
2017-07-12S1702354004ND
2017-10-09S1704820001ND
2017-10-09S1704820002ND
2017-10-09S1704820003ND
2017-10-09S1704820004ND
2018-01-09S1708626004ND
2018-01-09S1708626003ND
2018-01-09S1708626002ND
2018-01-09S1708626001ND
2018-04-10S1802514004ND
2018-04-10S1802514001ND
2018-04-10S1802514002ND
2018-04-10S18025140032.00 ppb
2018-07-09S1802495004ND
2018-07-09S1802495003ND
2018-07-09S1802495002ND
2018-07-09S1802495001ND
2018-10-10S1804595001ND
2018-10-10S1804595002ND
2018-10-10S1804595003ND
2018-10-10S1804595004ND
2019-01-15S1807026001ND
2019-01-15S1807026002ND
2019-01-15S1807026003ND
2019-01-15S1807026004ND
2019-04-10S1904680001ND
2019-04-10S1904680004ND
2019-04-10S1904680003ND
2019-04-10S1904680002ND
2019-07-10S1917180002ND
2019-07-10S1917180004ND
2019-07-10S1917180003ND
2019-07-10S1917180001ND
2019-10-09S1947991004ND
2019-10-09S1947991003ND
2019-10-09S1947991002ND
2019-10-09S1947991001ND