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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

City of Tucson

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.

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266

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.635 ppb6049ND - 2.20 ppb
2014N/A00N/A
2015N/A00N/A
2016ND1080ND
2017N/A00N/A
2018N/A00N/A
2019ND980ND

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
2013-04-10201304110659AM1.10 ppb
2013-04-10201304110657AM1.20 ppb
2013-04-15201304160056AM1.60 ppb
2013-04-15201304160050AM1.20 ppb
2013-04-15201304160054AM0.360 ppb
2013-04-15201304160052AM1.80 ppb
2013-04-17201304190462AM0.600 ppb
2013-04-17201304190460AMND
2013-04-17201304190458AM0.300 ppb
2013-04-22201304240199AM0.510 ppb
2013-04-22201304240201AM0.430 ppb
2013-04-22201304240197AM0.960 ppb
2013-04-22201304240203AM0.510 ppb
2013-04-23201304250527AM1.20 ppb
2013-04-23201304250529AM0.970 ppb
2013-04-23201304250523AM0.430 ppb
2013-04-23201304250525AM0.540 ppb
2013-04-24201304260166AM0.260 ppb
2013-04-24201304260164AM0.540 ppb
2013-04-24201304260162AMND
2013-04-29201305010451AM0.270 ppb
2013-04-29201305010447AMND
2013-04-29201305010177AM0.690 ppb
2013-04-29201305010206AM1.000 ppb
2013-04-29201305020190AM0.370 ppb
2013-04-29201305010449AM0.330 ppb
2013-06-19201306210144AM1.90 ppb
2013-06-19201306210152AM0.950 ppb
2013-06-19201306210146AMND
2013-06-19201306210148AM1.80 ppb
2013-10-08201310110335AM0.250 ppb
2013-10-08201310110337AM0.730 ppb
2013-10-08201310120152AMND
2013-10-08201310110333AM0.220 ppb
2013-10-08201310120150AM0.240 ppb
2013-10-08201310110331AM0.200 ppb
2013-10-09201310120158AMND
2013-10-09201310120162AM0.950 ppb
2013-10-09201310120154AM0.210 ppb
2013-10-09201310120156AM0.260 ppb
2013-10-09201310120160AM0.870 ppb
2013-10-14201310150058AM1.60 ppb
2013-10-14201310150052AM1.10 ppb
2013-10-14201310150054AM1.40 ppb
2013-10-14201310150056AM0.300 ppb
2013-10-16201310170120AM0.280 ppb
2013-10-16201310170126AM2.20 ppb
2013-10-16201310170118AMND
2013-10-16201310170124AMND
2013-10-16201310170122AM0.620 ppb
2013-10-17201310180357AM0.280 ppb
2013-10-17201310180353AMND
2013-10-17201310180359AMND
2013-10-17201310180355AMND
2013-10-29201310300080AM0.530 ppb
2013-10-29201310300076AM0.560 ppb
2013-10-29201310300074AM0.610 ppb
2013-10-29201310300078AM0.550 ppb
2013-10-29201310300082AM0.600 ppb
2013-11-20201311220543AM1.70 ppb
2016-01-11L160042-01IND
2016-01-11L160042-03IND
2016-01-11L160042-04IND
2016-01-12L160043-01IND
2016-01-12L160043-02IND
2016-01-12L160043-03IND
2016-01-12L160043-04IND
2016-01-12L160043-05IND
2016-01-13L160045-02IND
2016-01-13L160045-04IND
2016-01-13L160045-05IND
2016-01-14L160046-01IND
2016-01-14L160046-03IND
2016-01-14L160046-04IND
2016-01-14L160046-05IND
2016-01-19L160066-01IND
2016-01-19L160066-02IND
2016-01-19L160066-03IND
2016-01-19L160066-04IND
2016-01-19L160066-05IND
2016-01-20L160068-01IND
2016-01-20L160068-02IND
2016-01-20L160068-03IND
2016-01-20L160068-04IND
2016-01-20L160068-05IND
2016-01-21L160069-01IND
2016-01-21L160069-02IND
2016-01-21L160069-03IND
2016-01-21L160069-04IND
2016-01-21L160069-05IND
2016-01-25L160091-01IND
2016-01-25L160091-02IND
2016-01-25L160091-03IND
2016-01-25L160091-04IND
2016-01-25L160091-05IND
2016-01-26L160092-01IND
2016-01-26L160092-03IND
2016-01-26L160092-04IND
2016-01-26L160092-05IND
2016-01-27L160094-01IND
2016-01-27L160094-02IND
2016-01-27L160094-04IND
2016-01-27L160094-05IND
2016-01-28L160104-02IND
2016-01-28L160104-03IND
2016-01-28L160104-04IND
2016-01-28L160118-01ND
2016-02-01L160119-01ND
2016-02-01L160119-03IND
2016-02-01L160119-04IND
2016-02-02L160122-01IND
2016-02-02L160122-02IND
2016-02-02L160122-03IND
2016-02-02L160122-04IND
2016-02-02L160122-05IND
2016-02-03L160123-01IND
2016-02-03L160123-04IND
2016-02-04L160125-01IND
2016-02-04L160125-02IND
2016-02-04L160125-03IND
2016-02-04L160125-04IND
2016-02-08L160143-02IND
2016-02-08L160143-03IND
2016-02-08L160143-05IND
2016-02-09L160144-02IND
2016-02-09L160144-03IND
2016-02-09L160144-04IND
2016-02-09L160144-05IND
2016-02-10L160145-03IND
2016-02-10L160145-04IND
2016-02-10L160145-05IND
2016-02-11L160148-01ND
2016-02-11L160148-02TND
2016-02-11L160148-04TND
2016-02-11L160148-05IND
2016-02-11L160171-01IND
2016-02-16L160172-03IND
2016-02-16L160172-04IND
2016-02-17L160173-01IND
2016-02-17L160173-02ND
2016-02-18L160178-04ND
2016-02-23L160210-01ND
2016-02-23L160210-02ND
2016-02-23L160210-03ND
2016-02-24L160211-01JND
2016-02-24L160211-02JND
2016-02-24L160211-03JND
2016-02-25L160212-03ND
2016-02-29L160245-01ND
2016-02-29L160245-02ND
2016-03-01L160246-03JND
2016-03-02L160247-01ND
2016-03-07L160268-02JND
2016-03-10L160280-02JND
2016-03-10L160280-03TND
2016-04-20L160468-01ND
2016-04-27L160497-05ND
2016-04-28L160498-01ND
2016-04-28L160498-02ND
2016-04-28L160498-04ND
2016-05-02L160516-01ND
2016-05-03L160517-01ND
2016-05-05L160525-02ND
2016-05-31L160656-01IND
2016-05-31L160656-02IND
2016-06-14L160697-01IND
2016-06-16L160723-01IND
2016-10-04L161215-01ND
2019-03-19L190423-01 IOCND
2019-04-01L190499-02ND
2019-04-01L190499-03ND
2019-04-01L190499-05ND
2019-04-01L190499-06ND
2019-04-04L190541-01ND
2019-04-11L190512-01ND
2019-04-11L190512-02ND
2019-04-11L190512-03ND
2019-04-11L190512-04ND
2019-04-15L190597-01ND
2019-04-15L190597-02ND
2019-04-15L190597-03ND
2019-04-15L190597-04ND
2019-04-17L190610-01ND
2019-04-17L190610-03ND
2019-04-18L190624-01ND
2019-04-18L190624-02ND
2019-04-18L190624-03ND
2019-04-23L190640-01ND
2019-04-23L190640-02ND
2019-04-23L190640-03ND
2019-04-23L190640-04ND
2019-04-24L190645-02ND
2019-04-24L190645-03ND
2019-04-25L190648-01ND
2019-04-25L190648-02ND
2019-04-25L190648-03ND
2019-04-30L190670-01ND
2019-04-30L190670-02ND
2019-05-01L190678-02ND
2019-05-01L190678-03ND
2019-05-01L190678-04ND
2019-05-02L190690-01ND
2019-05-02L190690-03ND
2019-05-06L190704-03ND
2019-05-07L190712-01ND
2019-05-07L190712-02ND
2019-05-07L190712-03ND
2019-05-08L190725-01ND
2019-05-08L190725-02ND
2019-05-09L190728-01-20131ND
2019-05-13L190741-01-20131ND
2019-05-13L190741-02-20131ND
2019-05-14L190748-02-20131ND
2019-05-15L190761-01-20131ND
2019-05-15L190761-02-20131ND
2019-05-15L190761-03-20131ND
2019-05-20L190783-02-20131ND
2019-05-20L190783-03-20131ND
2019-05-28L190813-01-06260ND
2019-05-28L190813-02-06260ND
2019-05-28L190813-03-06260ND
2019-05-28L190813-04-06260ND
2019-05-30L190835-01-06260ND
2019-05-30L190835-02-06260ND
2019-05-30L190835-03-06260ND
2019-05-30L190835-04-06260ND
2019-05-30L190835-05-06260ND
2019-05-30L190835-06-06260ND
2019-06-03L190837-01-06260ND
2019-06-03L190837-02-06260ND
2019-06-03L190837-03-06260ND
2019-06-03L190837-04-06260ND
2019-06-03L190837-05-06260ND
2019-06-04L190851-01-06281ND
2019-06-04L190851-03-06281ND
2019-06-04L190851-04-06281ND
2019-06-04L190851-05-06281ND
2019-06-06L190879-01-06281ND
2019-06-06L190879-02-06281ND
2019-06-06L190879-03-06281ND
2019-06-06L190879-04-06281ND
2019-06-06L190879-05-06281ND
2019-06-11L190893-01-06281ND
2019-06-11L190893-02-06281ND
2019-06-11L190893-03-06281ND
2019-06-11L190893-04-06281ND
2019-06-13L190907-01-07081ND
2019-06-13L190907-02-07081ND
2019-06-13L190907-03-07081ND
2019-06-13L190907-04-07081ND
2019-06-25L190968-01-07081ND
2019-06-27L190983-01-08131ND
2019-08-20L191266-01-10011ND
2019-08-20L191266-02-10011ND
2019-08-22L191282-01-10011ND
2019-08-22L191282-02-10011ND
2019-09-09L191400-01-10011ND
2019-09-09L191400-02-10011ND
2019-09-10L191408-01-10011ND
2019-09-11L191425-01-10011ND
2019-09-11L191425-02-10011ND
2019-09-11L191425-03-10011ND
2019-09-12L191433-01-10011ND
2019-09-16L191452-01-10021ND
2019-11-19L191822-01-01071ND
2019-11-20L191829-01-01071ND