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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Lamar County Water Supply 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

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.38 ppb167ND - 5.10 ppb
20153.76 ppb1614ND - 7.90 ppb
20160.925 ppb164ND - 5.20 ppb
20170.900 ppb168ND - 2.80 ppb
20182.50 ppb16161.10 ppb - 3.60 ppb
20192.01 ppb1614ND - 3.70 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
2014-03-20Q1409135004ND
2014-03-20Q1409135003ND
2014-03-20Q1409135002ND
2014-03-20Q1409135001ND
2014-04-21Q14125110042.40 ppb
2014-04-21Q14125110032.50 ppb
2014-04-21Q14125110022.60 ppb
2014-04-21Q14125110012.40 ppb
2014-07-22Q1430087002ND
2014-07-22Q1430087001ND
2014-07-22Q1430087003ND
2014-07-22Q1430087004ND
2014-10-14Q14523350045.10 ppb
2014-10-14Q14523350033.40 ppb
2014-10-14Q14523350023.70 ppb
2014-10-14Q1452335001ND
2015-01-26Q15027300063.10 ppb
2015-01-26Q15027300052.80 ppb
2015-01-26Q15027300042.50 ppb
2015-01-26Q15027300032.60 ppb
2015-04-13Q15135610015.30 ppb
2015-04-13Q15135610025.30 ppb
2015-04-13Q15135610045.50 ppb
2015-04-13Q15135610034.90 ppb
2015-07-27Q1529086004ND
2015-07-27Q15290860035.20 ppb
2015-07-27Q15290860027.90 ppb
2015-07-27Q1529086001ND
2015-11-24Q15467970045.50 ppb
2015-11-24Q15467970033.00 ppb
2015-11-24Q15467970023.10 ppb
2015-11-24Q15467970013.40 ppb
2016-01-13Q1601294001ND
2016-01-13Q1601294002ND
2016-01-13Q1601294003ND
2016-01-13Q1601294004ND
2016-05-12Q1619035004ND
2016-05-12Q1619035003ND
2016-05-12Q1619035002ND
2016-05-12Q1619035001ND
2016-07-18Q1629019004ND
2016-07-18Q1629019003ND
2016-07-18Q1629019002ND
2016-07-18Q1629019001ND
2016-11-02Q16471920033.30 ppb
2016-11-02Q16471920025.20 ppb
2016-11-02Q16471920043.20 ppb
2016-11-02Q16471920013.10 ppb
2017-01-19Q17025780021.30 ppb
2017-01-19Q17025780041.40 ppb
2017-01-19Q17025780011.20 ppb
2017-01-19Q17025780031.40 ppb
2017-05-02Q1718043003ND
2017-05-02Q1718043002ND
2017-05-02Q1718043001ND
2017-05-02Q1718043004ND
2017-07-19Q1729701001ND
2017-07-19Q1729701003ND
2017-07-19Q1729701004ND
2017-07-19Q1729701002ND
2017-11-09Q17576320031.80 ppb
2017-11-09Q17576320062.80 ppb
2017-11-09Q17576320022.20 ppb
2017-11-09Q17576320052.30 ppb
2018-01-29Q18032700043.10 ppb
2018-01-29Q18032700022.70 ppb
2018-01-29Q18032700033.10 ppb
2018-01-29Q18032700012.70 ppb
2018-04-04Q18139520033.10 ppb
2018-04-04Q18139520013.20 ppb
2018-04-04Q18139520043.40 ppb
2018-04-04Q18139520023.60 ppb
2018-07-10Q18270680061.10 ppb
2018-07-10Q18270680051.50 ppb
2018-07-10Q18270680011.90 ppb
2018-07-10Q18270680041.80 ppb
2018-11-27Q18480280042.10 ppb
2018-11-27Q18480280032.50 ppb
2018-11-27Q18480280022.20 ppb
2018-11-27Q18480280012.00 ppb
2019-01-30Q19045200041.70 ppb
2019-01-30Q19045200031.60 ppb
2019-01-30Q19045200051.70 ppb
2019-01-30Q19045200061.70 ppb
2019-04-10Q19144460042.70 ppb
2019-04-10Q19144460032.80 ppb
2019-04-10Q19144460022.60 ppb
2019-04-10Q19144460012.40 ppb
2019-07-22Q19463460041.60 ppb
2019-07-22Q19463460033.30 ppb
2019-07-22Q19463460023.70 ppb
2019-07-22Q19463460012.60 ppb
2019-10-07Q19713550041.80 ppb
2019-10-07Q1971355003ND
2019-10-07Q1971355002ND
2019-10-07Q19713550012.00 ppb