Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Monochloroacetic acid

City of Portsmouth

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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016ND90ND
20170.0556 ppb181ND - 1.000 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
2016-08-03216217-02ND
2016-08-03216217-04ND
2016-08-03216217-05ND
2016-08-03216217-07ND
2016-08-03216217-06ND
2016-08-03216217-08ND
2016-08-03216217-09ND
2016-08-03216217-10ND
2016-08-03216217-11ND
2017-02-01217033-10ND
2017-02-01217033-07ND
2017-02-01217033-06ND
2017-02-01217033-02ND
2017-02-01217033-11ND
2017-02-01217033-081.000 ppb
2017-02-01217033-09ND
2017-02-01217033-04ND
2017-02-01217033-05ND
2017-11-01217306-15ND
2017-11-01217306-16ND
2017-11-01217306-17ND
2017-11-01217306-18ND
2017-11-01217306-19ND
2017-11-01217306-23ND
2017-11-01217306-20ND
2017-11-01217306-21ND
2017-11-01217306-22ND