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EWG's Tap Water Database — 2019 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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20122.45 ppb42ND - 7.40 ppb
20134.43 ppb42ND - 15.1 ppb
2014ND40ND
2015ND40ND
2016ND40ND
2017ND40ND

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
2012-03-15AB84234ND
2012-06-19AB932507.40 ppb
2012-09-25AC02091ND
2012-12-201212B680022.40 ppb
2013-03-06130323000915.1 ppb
2013-05-14Q13011250012.60 ppb
2013-08-20Q1305771001ND
2013-10-29Q1310224001ND
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