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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

West Cedar Creek MUD

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
20141.64 ppb1611ND - 3.10 ppb
20153.01 ppb1612ND - 6.90 ppb
20160.700 ppb164ND - 2.90 ppb
2017ND160ND
20182.94 ppb16161.40 ppb - 5.00 ppb
20192.14 ppb1615ND - 4.20 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
2014-03-20Q14090720032.30 ppb
2014-03-20Q14090720022.10 ppb
2014-03-20Q14090720012.30 ppb
2014-03-20Q14090720082.20 ppb
2014-06-25Q1423903006ND
2014-06-25Q1423903005ND
2014-06-25Q1423903004ND
2014-06-25Q1423903003ND
2014-09-24Q14475280062.90 ppb
2014-09-24Q14475280053.10 ppb
2014-09-24Q14475280072.60 ppb
2014-09-24Q1447528008ND
2014-12-22Q14608410042.10 ppb
2014-12-22Q14608410032.10 ppb
2014-12-22Q14608410022.30 ppb
2014-12-22Q14608410012.30 ppb
2015-03-26Q15112760054.10 ppb
2015-03-26Q15112760042.60 ppb
2015-03-26Q15112760083.10 ppb
2015-03-26Q15112760073.30 ppb
2015-06-25Q1524263001ND
2015-06-25Q1524263002ND
2015-06-25Q15242630042.30 ppb
2015-06-25Q15242630033.80 ppb
2015-09-25Q15379940044.40 ppb
2015-09-25Q15379940035.70 ppb
2015-09-25Q15379940025.80 ppb
2015-09-25Q15379940016.90 ppb
2015-12-14Q15497430083.80 ppb
2015-12-14Q15497430072.40 ppb
2015-12-14Q1549743006ND
2015-12-14Q1549743005ND
2016-03-02Q16090030182.80 ppb
2016-03-02Q16090030172.90 ppb
2016-03-02Q16090030192.70 ppb
2016-03-02Q16090030202.80 ppb
2016-05-26Q1621006004ND
2016-05-26Q1621006003ND
2016-05-26Q1621006002ND
2016-05-26Q1621006001ND
2016-09-08Q1636542008ND
2016-09-08Q1636542007ND
2016-09-08Q1636542006ND
2016-09-08Q1636542005ND
2016-11-10Q1649390001ND
2016-11-10Q1649390004ND
2016-11-10Q1649390003ND
2016-11-10Q1649390002ND
2017-03-01Q1708733012ND
2017-03-01Q1708733011ND
2017-03-01Q1708733010ND
2017-03-01Q1708733009ND
2017-05-31Q1723096004ND
2017-05-31Q1723096003ND
2017-05-31Q1723096002ND
2017-05-31Q1723096001ND
2017-08-25Q1738905001ND
2017-08-25Q1738905004ND
2017-08-25Q1738905008ND
2017-08-25Q1738905005ND
2017-12-04Q1762650004ND
2017-12-04Q1762650003ND
2017-12-04Q1762650002ND
2017-12-04Q1762650001ND
2018-02-23Q18077710021.70 ppb
2018-02-23Q18077710041.40 ppb
2018-02-23Q18077710011.50 ppb
2018-02-23Q18077710031.50 ppb
2018-05-25Q18212770014.00 ppb
2018-05-25Q18212770023.00 ppb
2018-05-25Q18212770043.90 ppb
2018-05-25Q18212770033.50 ppb
2018-08-22Q18337160161.80 ppb
2018-08-22Q18337160082.50 ppb
2018-08-22Q18337160072.50 ppb
2018-08-22Q18337160152.00 ppb
2018-12-10Q18502810044.40 ppb
2018-12-10Q18502810034.10 ppb
2018-12-10Q18502810025.00 ppb
2018-12-10Q18502810014.30 ppb
2019-01-07Q19003340033.10 ppb
2019-01-07Q19003340132.90 ppb
2019-01-07Q19003340043.10 ppb
2019-01-07Q19003340054.20 ppb
2019-04-08Q19141860013.40 ppb
2019-04-08Q19141860041.90 ppb
2019-04-08Q19141860032.40 ppb
2019-04-08Q19141860023.40 ppb
2019-09-10Q1963307008ND
2019-09-10Q19633070071.50 ppb
2019-09-10Q19633070061.80 ppb
2019-09-10Q19633070051.90 ppb
2019-12-11Q19797780011.10 ppb
2019-12-11Q19797780041.20 ppb
2019-12-11Q19797780031.20 ppb
2019-12-11Q19797780021.10 ppb