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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

City of Scottsdale

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.

 

59

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
20144.85 ppb4036ND - 39.1 ppb
20154.08 ppb43ND - 6.90 ppb
2016ND20ND
20171.66 ppb94ND - 5.70 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
2012-03-07AB29691ND
2012-05-31AB31398ND
2013-03-12AB37901IND
2013-06-04AB39410ND
2014-02-05AB45659IND
2014-02-05AB45660I4.40 ppb
2014-02-05AB45661I39.1 ppb
2014-02-05AB45662I1.30 ppb
2014-02-10201402100091AM0.330 ppb
2014-02-10201402100085AM3.50 ppb
2014-02-10201402100087AM32.0 ppb
2014-02-10201402100089AM1.000 ppb
2014-02-11AB45852I5.30 ppb
2014-02-12AB45865I14.9 ppb
2014-02-13AB45912I2.50 ppb
2014-02-13AB45913IND
2014-03-13AB46644I3.70 ppb
2014-05-14201405140673AM0.760 ppb
2014-05-14201405140675AM2.60 ppb
2014-05-14201405140665AM2.80 ppb
2014-05-14201405140663AMND
2014-06-03AB48513ND
2014-08-05201408050565AM0.880 ppb
2014-08-05201408050592AM0.350 ppb
2014-08-05201408050563AM5.30 ppb
2014-08-07201408070363AM6.00 ppb
2014-08-07201408070361AM2.30 ppb
2014-08-13201408130323AM1.20 ppb
2014-08-13201408130321AM1.30 ppb
2014-08-13201408130313AM5.00 ppb
2014-08-13201408130317AM0.390 ppb
2014-08-13201408130351AM0.400 ppb
2014-08-13201408130345AM4.70 ppb
2014-08-13201408130325AM1.60 ppb
2014-08-13201408130319AM1.30 ppb
2014-08-13201408130315AM0.370 ppb
2014-08-14201408140538AM38.0 ppb
2014-08-21201408220384AM0.400 ppb
2014-08-26201408260309AM1.10 ppb
2014-08-27AB50551I2.80 ppb
2014-11-10201411100073AM2.70 ppb
2014-11-10201411100061AM0.530 ppb
2014-11-10201411100071AM2.60 ppb
2014-11-10201411100059AM0.450 ppb
2015-01-26AB541806.90 ppb
2015-03-05201503050034AM5.00 ppb
2015-03-30201503300283AM4.40 ppb
2015-05-19AB57086ND
2016-01-12AB62917JND
2016-06-09AB66662ND
2017-01-23AB72209T3.00 ppb
2017-01-31AB72396TND
2017-01-31AB72398T4.70 ppb
2017-04-11AB74281ND
2017-04-18AZ744565.70 ppb
2017-05-03AB749541.50 ppb
2017-05-03AB74952ND
2017-05-11AB75252ND
2017-05-25AB75560ND