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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Waipahu-Ewa-Waianae

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

 

59

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
2015ND120ND
2016ND120ND
2017ND110ND
2018ND120ND
2019ND120ND

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
2015-01-06201501080391ND
2015-01-06201501080399ND
2015-01-06201501080390ND
2015-04-01201504030241ND
2015-04-01201504030242ND
2015-04-01201504030243ND
2015-07-07201507080164ND
2015-07-13201507150564ND
2015-07-13201507150565ND
2015-10-05201510070195ND
2015-10-06201509160115ND
2015-10-06201509160114ND
2016-01-09ND
2016-01-12ND
2016-01-12ND
2016-04-06ND
2016-04-06ND
2016-04-19ND
2016-07-05ND
2016-07-05ND
2016-07-06ND
2016-10-06ND
2016-10-06ND
2016-10-06ND
2017-01-06ND
2017-01-10ND
2017-01-17ND
2017-04-05ND
2017-04-10ND
2017-07-03ND
2017-07-03ND
2017-07-03ND
2017-10-03ND
2017-10-03ND
2017-10-05ND
2018-01-10201801030087ND
2018-01-10201801030082ND
2018-01-12201801030081ND
2018-04-02201804040971ND
2018-04-02201804040970ND
2018-04-02201804040973ND
2018-07-06201807111062ND
2018-07-06201807111063ND
2018-07-09201807111359ND
2018-10-03201810050561ND
2018-10-05201810090639ND
2018-10-05201810090640ND
2019-01-11201901150154ND
2019-01-11201901150153ND
2019-01-17201901180119ND
2019-04-02201904040155ND
2019-04-02201904040154ND
2019-04-03201904050204ND
2019-07-08201907100468ND
2019-07-08201907100467ND
2019-07-09201907110400ND
2019-10-04201910080585ND
2019-10-07201910090557ND
2019-10-07201910090558ND