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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

United Water Pennsylvania

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

 

51

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
20180.964 ppb113ND - 5.40 ppb
20191.52 ppb4033ND - 4.78 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
2018-09-132337916001ND
2018-10-012341400001ND
2018-11-123000055008ND
2018-11-123000055003ND
2018-11-123000055004ND
2018-11-123000055002ND
2018-11-1230000550052.20 ppb
2018-11-123000055006ND
2018-11-123000055001ND
2018-11-1230000550073.00 ppb
2018-12-0630040700015.40 ppb
2019-01-09H9A0602-013.60 ppb
2019-02-11H9B0641-060.530 ppb
2019-02-11H9B0641-071.30 ppb
2019-02-11H9B0641-050.700 ppb
2019-02-11H9B0641-08ND
2019-02-11H9B0641-041.30 ppb
2019-02-11H9B0641-020.690 ppb
2019-02-11H9B0641-010.720 ppb
2019-02-11H9B0641-031.20 ppb
2019-03-11H9C0584-011.14 ppb
2019-04-08H9D0658-010.665 ppb
2019-05-08H9E0656-080.850 ppb
2019-05-08H9E0656-074.02 ppb
2019-05-08H9E0656-050.840 ppb
2019-05-08H9E0656-031.68 ppb
2019-05-08H9E0656-011.88 ppb
2019-05-08H9E0656-041.39 ppb
2019-05-08H9E0656-060.845 ppb
2019-05-08H9E0656-020.746 ppb
2019-06-03H9F0594-014.10 ppb
2019-07-014341228ND
2019-08-08H9H0719-021.44 ppb
2019-08-08H9H0719-061.94 ppb
2019-08-08H9H0719-073.08 ppb
2019-08-08H9H0719-051.83 ppb
2019-08-08H9H0719-033.34 ppb
2019-08-08H9H0719-083.40 ppb
2019-08-08H9H0719-04ND
2019-08-08H9H0719-012.38 ppb
2019-09-039031158-01ND
2019-10-089J09034-01ND
2019-11-11H9K0576-073.36 ppb
2019-11-11H9K0576-06RE1.02 ppb
2019-11-11H9K0576-031.25 ppb
2019-11-11H9K0576-021.86 ppb
2019-11-11H9K0576-051.66 ppb
2019-11-11H9K0576-08RE4.78 ppb
2019-11-11H9K0576-04ND
2019-11-11H9K0576-011.29 ppb
2019-12-119043240-01ND