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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Upper Leon River Municipal Water District

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

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND40ND
2016ND40ND
2017ND40ND
2018ND40ND
20191.60 ppb41ND - 6.40 ppb

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
2014-03-18AC47358ND
2014-06-26AC58214ND
2014-09-24AC68078ND
2014-12-03AC73471ND
2015-02-19AC81323ND
2015-04-08AC87700ND
2015-08-05AD02630ND
2015-10-06AD09609ND
2016-01-13AD17879ND
2016-04-14AD33188ND
2016-08-03AD46875ND
2016-10-12AD53160ND
2017-03-15AD75429ND
2017-05-16AD84660ND
2017-08-24AD94157ND
2017-11-15AE05184ND
2018-02-28AE16030ND
2018-06-14AE30031ND
2018-09-12AE40019ND
2018-11-20AE46661ND
2019-02-28AE56558ND
2019-05-29AE68414ND
2019-08-07AE774756.40 ppb
2019-11-06AE88671ND