Menu

EWG's Tap Water Database

Donate

Chromium (total)

Layton City Water System

Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010N/A00N/A
2011ND10ND
2012N/A00N/A
20130.501 ppb660.339 ppb - 0.742 ppb
20140.323 ppb65ND - 0.475 ppb
2015ND10ND

ppb = parts per billion.

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 100 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

EPA Maximum Contaminant
Level Goal (MCLG)100 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Result
2011-07-14ND
2013-09-100.502 ppb
2013-09-100.398 ppb
2013-09-100.348 ppb
2013-09-100.339 ppb
2013-12-130.676 ppb
2013-12-130.742 ppb
2014-03-110.265 ppb
2014-03-120.403 ppb
2014-03-120.475 ppb
2014-03-120.460 ppb
2014-06-12ND
2014-06-120.333 ppb
2015-08-10ND