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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

City of Phoenix

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.

 

64

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201214.1 ppb84ND - 35.0 ppb
20135.16 ppb2928ND - 39.0 ppb
201429.2 ppb97ND - 75.2 ppb
201533.2 ppb54ND - 43.0 ppb
201631.7 ppb54ND - 44.9 ppb
201727.3 ppb87ND - 44.0 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
2012-01-032012000419ND
2012-01-032012000421ND
2012-01-042010248-02ND
2012-01-092012001235ND
2012-01-10201200185534.4 ppb
2012-04-19201202469335.0 ppb
2012-07-11201204505526.0 ppb
2012-10-23201207034717.0 ppb
2013-01-023010074-01ND
2013-01-15201300228138.0 ppb
2013-02-1920130100351.000 ppb
2013-02-1920130100581.10 ppb
2013-02-1920130100420.400 ppb
2013-02-1920130100541.000 ppb
2013-02-1920130100501.70 ppb
2013-02-2620130104010.300 ppb
2013-04-17201302340726.0 ppb
2013-05-1420130294920.700 ppb
2013-05-1420130294960.500 ppb
2013-05-1420130295320.200 ppb
2013-05-1520130295410.300 ppb
2013-05-1520130295490.200 ppb
2013-05-1520130295450.300 ppb
2013-07-09201304321934.0 ppb
2013-08-1320130507940.400 ppb
2013-08-1320130508110.400 ppb
2013-08-1320130508440.900 ppb
2013-08-1320130508400.800 ppb
2013-08-1420130510610.400 ppb
2013-08-1420130510570.400 ppb
2013-10-09201306360239.0 ppb
2013-11-0620130709430.200 ppb
2013-11-0620130709470.200 ppb
2013-11-0620130709510.500 ppb
2013-11-0620130709940.400 ppb
2013-11-0620130709900.200 ppb
2013-11-0620130709550.200 ppb
2014-01-064010287-01IND
2014-01-152014001121ND
2014-01-16201400113575.2 ppb
2014-01-16201400140717.2 ppb
2014-01-21201400318039.8 ppb
2014-01-21201400319646.4 ppb
2014-02-2620140096926.00 ppb
2014-07-09201404193637.0 ppb
2014-10-16201406466641.4 ppb
2015-01-07201501070258IND
2015-01-15201408415041.0 ppb
2015-04-16201502194542.0 ppb
2015-07-21201504687943.0 ppb
2015-10-13201506690140.0 ppb
2016-01-06201601060265IND
2016-01-14201600176241.6 ppb
2016-04-27201602553143.3 ppb
2016-07-19201604555228.8 ppb
2016-10-04201606468644.9 ppb
2017-01-04201701040662IND
2017-01-11201700185643.8 ppb
2017-01-18201700243622.0 ppb
2017-01-18201700242317.7 ppb
2017-01-2520170043518.00 ppb
2017-04-18201702938341.0 ppb
2017-08-02201705909741.6 ppb
2017-10-19201707935444.0 ppb