Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Chromium (total)

Sierra Madre Water Department

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
20130.407 ppb63ND - 1.70 ppb
2014ND50ND
2015N/A00N/A
2016N/A00N/A
2017ND50ND

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
2013-06-133F14032-03A1.70 ppb
2013-10-173J17040-03A0.350 ppb
2013-10-173J17040-01AND
2013-12-233L23104-05AND
2013-12-233L23104-03AND
2013-12-233L23104-01A0.390 ppb
2014-05-129588-003-1030ND
2014-05-129588-004-1045ND
2014-05-129588-005-1105ND
2014-05-129588-006-1055ND
2014-05-129588-007-1125ND
2017-05-039588-003-1030ND
2017-05-039588-004-1045ND
2017-05-039588-005-0930ND
2017-05-039588-006-0940ND
2017-05-039588-007-1010ND