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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Wailuku

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

 

100

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
2015ND320ND
2016ND200ND
2017ND160ND
2018ND160ND
2019ND160ND

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
2015-01-14201501190214ND
2015-01-14201501190215ND
2015-01-14201501190216ND
2015-01-14201501190218ND
2015-01-14201501190219ND
2015-01-14201501190213ND
2015-01-15201501190223ND
2015-01-15201501190224ND
2015-04-09201504140819ND
2015-04-09201504140834ND
2015-04-09201504140833ND
2015-04-09201504140832ND
2015-04-09201504140831ND
2015-04-09201504140820ND
2015-04-09201504140818ND
2015-04-09201504140817ND
2015-07-22201507240275ND
2015-07-22201507240279ND
2015-07-22201507240278ND
2015-07-22201507240277ND
2015-07-22201507240276ND
2015-07-22201507240274ND
2015-07-22201507240273ND
2015-07-22201507240272ND
2015-10-09201510130316ND
2015-10-09201510130317ND
2015-10-09201510130318ND
2015-10-09201510130319ND
2015-10-09201510130320ND
2015-10-09201510130321ND
2015-10-09201510130322ND
2015-10-09201510130323ND
2016-01-15ND
2016-01-15ND
2016-01-15ND
2016-01-15ND
2016-01-15ND
2016-01-15ND
2016-01-15ND
2016-01-15ND
2016-04-14ND
2016-04-14ND
2016-04-14ND
2016-04-14ND
2016-07-15ND
2016-07-15ND
2016-07-15ND
2016-07-15ND
2016-10-06ND
2016-10-06ND
2016-10-06ND
2016-10-06ND
2017-01-13ND
2017-01-13ND
2017-01-13ND
2017-01-13ND
2017-04-06ND
2017-04-06ND
2017-04-06ND
2017-04-06ND
2017-07-13ND
2017-07-13ND
2017-07-13ND
2017-07-13ND
2017-10-06ND
2017-10-06ND
2017-10-06ND
2017-10-06ND
2018-01-11201801180640ND
2018-01-11201801180641ND
2018-01-11201801180643ND
2018-01-11201801180642ND
2018-04-05201804100503ND
2018-04-05201804100504ND
2018-04-05201804100505ND
2018-04-05201804100506ND
2018-07-02201807060179ND
2018-07-02201807060178ND
2018-07-02201807060176ND
2018-07-02201807060177ND
2018-10-04201810090384ND
2018-10-04201810090382ND
2018-10-04201810090383ND
2018-10-04201810090385ND
2019-01-03201901080078ND
2019-01-03201901080079ND
2019-01-03201901080080ND
2019-01-03201901080077ND
2019-04-05201904090474ND
2019-04-05201904090477ND
2019-04-05201904090476ND
2019-04-05201904090475ND
2019-07-26201907300338ND
2019-07-26201907300341ND
2019-07-26201907300339ND
2019-07-26201907300340ND
2019-10-03201910080605ND
2019-10-03201910080606ND
2019-10-03201910080607ND
2019-10-03201910080604ND