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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of Lancaster

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

 

94

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
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017ND380ND
20181.36 ppb2310ND - 4.80 ppb
20191.70 ppb3317ND - 5.20 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
2017-02-0715759640ND
2017-02-0715759638ND
2017-02-0715759635ND
2017-02-0715759639ND
2017-02-0715759634ND
2017-02-0815759637ND
2017-02-0815759636ND
2017-02-0815759633ND
2017-03-0815900964ND
2017-03-2215900992ND
2017-05-0816217966ND
2017-05-0816217969ND
2017-05-0816217968ND
2017-05-0816217967ND
2017-05-0916217964ND
2017-05-0916217965ND
2017-05-1716218067ND
2017-05-2416218068ND
2017-08-0816689370ND
2017-08-0816689373ND
2017-08-0816689372ND
2017-08-0816689371ND
2017-08-0816689374ND
2017-08-0916689367ND
2017-08-0916689368ND
2017-08-0916689369ND
2017-11-0617128934ND
2017-11-0617128890ND
2017-11-0617128956ND
2017-11-0617128945ND
2017-11-0617128912ND
2017-11-0817128901ND
2017-11-0817128923ND
2017-11-0817128879ND
2017-12-1117268397ND
2017-12-1217268408ND
2017-12-1217268386ND
2017-12-1217268375ND
2018-02-068002953-07ND
2018-02-068002953-06ND
2018-02-068002953-05ND
2018-02-068002953-02ND
2018-02-088002953-08ND
2018-02-088002953-04ND
2018-02-088002953-03ND
2018-02-088002953-01ND
2018-09-2523410350024.80 ppb
2018-11-072349167005ND
2018-11-0723491670043.20 ppb
2018-11-072349167001ND
2018-11-0723491670033.90 ppb
2018-11-0823491670083.70 ppb
2018-11-0823491670062.50 ppb
2018-11-0823491670072.90 ppb
2018-11-0823491670022.30 ppb
2018-12-123006044005ND
2018-12-1230060440023.10 ppb
2018-12-1230060440032.30 ppb
2018-12-123006044001ND
2018-12-1230060440062.50 ppb
2018-12-133006044007ND
2019-02-0630155560062.60 ppb
2019-02-0630155560022.50 ppb
2019-02-063015556005ND
2019-02-0630155560042.50 ppb
2019-02-0630155560073.30 ppb
2019-02-0730155560032.80 ppb
2019-02-0730155560013.60 ppb
2019-02-0730155560082.90 ppb
2019-05-0630326890055.00 ppb
2019-05-0630326890044.30 ppb
2019-05-063032689001ND
2019-05-0630326890024.10 ppb
2019-05-073032689008ND
2019-05-0730326890074.00 ppb
2019-05-0730326890065.00 ppb
2019-05-0730326890035.20 ppb
2019-08-063050286002ND
2019-08-063050286006ND
2019-08-063050286004ND
2019-08-063050286003ND
2019-08-073050286001ND
2019-08-073050286007ND
2019-08-073050286005ND
2019-08-073050286008ND
2019-11-0730689200052.10 ppb
2019-11-073068920004ND
2019-11-073068920001ND
2019-11-073068920003ND
2019-11-073068920002ND
2019-11-083069998002ND
2019-11-0830699980032.10 ppb
2019-11-0830699980012.00 ppb
2019-12-1830766130012.10 ppb