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EWG's Tap Water Database — 2019 UPDATE

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Chromium (hexavalent)

Mukilteo Water & Wastewater District

Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).

 

8

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
20130.232 ppb440.204 ppb - 0.258 ppb
20140.329 ppb440.312 ppb - 0.346 ppb
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.02 ppb

The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) was defined 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 cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2013-08-0713H0372-02A0.258 ppb
2013-08-0713H0372-01A0.235 ppb
2013-11-1413K0602-01A0.204 ppb
2013-11-1413K0602-02A0.230 ppb
2014-02-1414B0725-01A0.326 ppb
2014-02-1414B0725-03A0.312 ppb
2014-05-2014E0927-01A0.333 ppb
2014-05-2014E0927-03A0.346 ppb