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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Salem Water System

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

 

86

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND160ND
2016ND160ND
20170.733 ppb184ND - 3.70 ppb
20180.275 ppb162ND - 2.20 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
2014-11-181351147ND
2014-11-181351146ND
2014-11-181351147ND
2014-11-181351146ND
2015-02-171374553ND
2015-02-171374554ND
2015-02-171374554ND
2015-02-171374553ND
2015-05-151396225ND
2015-05-151396226ND
2015-05-151396226ND
2015-05-151396225ND
2015-08-171421801ND
2015-08-171421802ND
2015-08-171421802ND
2015-08-171421801ND
2015-11-191446028ND
2015-11-191446029ND
2015-11-191446029ND
2015-11-191446028ND
2016-02-161468279ND
2016-02-161468280ND
2016-02-161468280ND
2016-02-161468279ND
2016-05-111491040ND
2016-05-111491041ND
2016-05-111491040ND
2016-05-111491041ND
2016-08-151516438ND
2016-08-151516439ND
2016-08-151516438ND
2016-08-151516439ND
2016-11-081539771ND
2016-11-081539772ND
2016-11-081539771ND
2016-11-081539772ND
2017-02-0235292874009ND
2017-02-0235292874010ND
2017-02-0235292874010ND
2017-02-0235292874009ND
2017-05-1635312626003ND
2017-05-1635312626004ND
2017-05-1635312626003ND
2017-05-1635312626004ND
2017-08-09353298050153.70 ppb
2017-08-09353298050162.90 ppb
2017-08-09353298050153.70 ppb
2017-08-09353298050162.90 ppb
2017-11-1535349185001ND
2017-11-1535349185001ND
2017-12-2135365018001ND
2017-12-2135365018002ND
2017-12-2135365018001ND
2017-12-2135365018002ND
2018-02-2035375785001ND
2018-02-2035375785002ND
2018-02-2035375785002ND
2018-02-2035375785001ND
2018-05-2335394582001ND
2018-05-2335394582002ND
2018-05-2335394582002ND
2018-05-2335394582001ND
2018-08-20354127730012.20 ppb
2018-08-20354127730012.20 ppb
2018-09-1335417926001ND
2018-09-1335417926001ND
2018-11-1935432393001ND
2018-11-1935432393002ND
2018-11-1935432393001ND
2018-11-1935432393002ND
2019-02-1835449364002ND
2019-02-1835449364001ND
2019-02-1835449364001ND
2019-02-1835449364002ND
2019-05-1635469375002ND
2019-05-1635469375002ND
2019-05-1635469375001ND
2019-05-1635469375001ND
2019-08-1435491221002ND
2019-08-1435491221001ND
2019-08-1435491221001ND
2019-08-1435491221002ND
2019-11-1835514067001ND
2019-11-1835514067002ND
2019-11-1835514067001ND
2019-11-1835514067002ND