EWG's Tap Water Database — 2019 UPDATE


Chromium (total)

Glendale Waterworks

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.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20130.371 ppb880.240 ppb - 0.460 ppb
20140.350 ppb110.350 ppb
20150.500 ppb110.500 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 100 ppb

The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.

ppb = parts per billion

All test results

Date Lab ID Result
2013-05-073592425001AM0.310 ppb
2013-05-073592425003AM0.240 ppb
2013-06-193597483001AM0.460 ppb
2013-06-193597483003AM0.410 ppb
2013-09-2435109641003AM0.390 ppb
2013-11-2535117770001AM0.390 ppb
2013-12-1735120067003AM0.350 ppb
2013-12-1735120067001AM0.420 ppb