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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | 0.635 ppb | 60 | 49 | ND - 2.20 ppb |
2014 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 108 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 98 | 0 | ND |
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 |
---|---|---|
2013-04-10 | 201304110659AM | 1.10 ppb |
2013-04-10 | 201304110657AM | 1.20 ppb |
2013-04-15 | 201304160056AM | 1.60 ppb |
2013-04-15 | 201304160050AM | 1.20 ppb |
2013-04-15 | 201304160054AM | 0.360 ppb |
2013-04-15 | 201304160052AM | 1.80 ppb |
2013-04-17 | 201304190462AM | 0.600 ppb |
2013-04-17 | 201304190460AM | ND |
2013-04-17 | 201304190458AM | 0.300 ppb |
2013-04-22 | 201304240199AM | 0.510 ppb |
2013-04-22 | 201304240201AM | 0.430 ppb |
2013-04-22 | 201304240197AM | 0.960 ppb |
2013-04-22 | 201304240203AM | 0.510 ppb |
2013-04-23 | 201304250527AM | 1.20 ppb |
2013-04-23 | 201304250529AM | 0.970 ppb |
2013-04-23 | 201304250523AM | 0.430 ppb |
2013-04-23 | 201304250525AM | 0.540 ppb |
2013-04-24 | 201304260166AM | 0.260 ppb |
2013-04-24 | 201304260164AM | 0.540 ppb |
2013-04-24 | 201304260162AM | ND |
2013-04-29 | 201305010451AM | 0.270 ppb |
2013-04-29 | 201305010447AM | ND |
2013-04-29 | 201305010177AM | 0.690 ppb |
2013-04-29 | 201305010206AM | 1.000 ppb |
2013-04-29 | 201305020190AM | 0.370 ppb |
2013-04-29 | 201305010449AM | 0.330 ppb |
2013-06-19 | 201306210144AM | 1.90 ppb |
2013-06-19 | 201306210152AM | 0.950 ppb |
2013-06-19 | 201306210146AM | ND |
2013-06-19 | 201306210148AM | 1.80 ppb |
2013-10-08 | 201310110335AM | 0.250 ppb |
2013-10-08 | 201310110337AM | 0.730 ppb |
2013-10-08 | 201310120152AM | ND |
2013-10-08 | 201310110333AM | 0.220 ppb |
2013-10-08 | 201310120150AM | 0.240 ppb |
2013-10-08 | 201310110331AM | 0.200 ppb |
2013-10-09 | 201310120158AM | ND |
2013-10-09 | 201310120162AM | 0.950 ppb |
2013-10-09 | 201310120154AM | 0.210 ppb |
2013-10-09 | 201310120156AM | 0.260 ppb |
2013-10-09 | 201310120160AM | 0.870 ppb |
2013-10-14 | 201310150058AM | 1.60 ppb |
2013-10-14 | 201310150052AM | 1.10 ppb |
2013-10-14 | 201310150054AM | 1.40 ppb |
2013-10-14 | 201310150056AM | 0.300 ppb |
2013-10-16 | 201310170120AM | 0.280 ppb |
2013-10-16 | 201310170126AM | 2.20 ppb |
2013-10-16 | 201310170118AM | ND |
2013-10-16 | 201310170124AM | ND |
2013-10-16 | 201310170122AM | 0.620 ppb |
2013-10-17 | 201310180357AM | 0.280 ppb |
2013-10-17 | 201310180353AM | ND |
2013-10-17 | 201310180359AM | ND |
2013-10-17 | 201310180355AM | ND |
2013-10-29 | 201310300080AM | 0.530 ppb |
2013-10-29 | 201310300076AM | 0.560 ppb |
2013-10-29 | 201310300074AM | 0.610 ppb |
2013-10-29 | 201310300078AM | 0.550 ppb |
2013-10-29 | 201310300082AM | 0.600 ppb |
2013-11-20 | 201311220543AM | 1.70 ppb |
2016-01-11 | L160042-01I | ND |
2016-01-11 | L160042-03I | ND |
2016-01-11 | L160042-04I | ND |
2016-01-12 | L160043-01I | ND |
2016-01-12 | L160043-02I | ND |
2016-01-12 | L160043-03I | ND |
2016-01-12 | L160043-04I | ND |
2016-01-12 | L160043-05I | ND |
2016-01-13 | L160045-02I | ND |
2016-01-13 | L160045-04I | ND |
2016-01-13 | L160045-05I | ND |
2016-01-14 | L160046-01I | ND |
2016-01-14 | L160046-03I | ND |
2016-01-14 | L160046-04I | ND |
2016-01-14 | L160046-05I | ND |
2016-01-19 | L160066-01I | ND |
2016-01-19 | L160066-02I | ND |
2016-01-19 | L160066-03I | ND |
2016-01-19 | L160066-04I | ND |
2016-01-19 | L160066-05I | ND |
2016-01-20 | L160068-01I | ND |
2016-01-20 | L160068-02I | ND |
2016-01-20 | L160068-03I | ND |
2016-01-20 | L160068-04I | ND |
2016-01-20 | L160068-05I | ND |
2016-01-21 | L160069-01I | ND |
2016-01-21 | L160069-02I | ND |
2016-01-21 | L160069-03I | ND |
2016-01-21 | L160069-04I | ND |
2016-01-21 | L160069-05I | ND |
2016-01-25 | L160091-01I | ND |
2016-01-25 | L160091-02I | ND |
2016-01-25 | L160091-03I | ND |
2016-01-25 | L160091-04I | ND |
2016-01-25 | L160091-05I | ND |
2016-01-26 | L160092-01I | ND |
2016-01-26 | L160092-03I | ND |
2016-01-26 | L160092-04I | ND |
2016-01-26 | L160092-05I | ND |
2016-01-27 | L160094-01I | ND |
2016-01-27 | L160094-02I | ND |
2016-01-27 | L160094-04I | ND |
2016-01-27 | L160094-05I | ND |
2016-01-28 | L160104-02I | ND |
2016-01-28 | L160104-03I | ND |
2016-01-28 | L160104-04I | ND |
2016-01-28 | L160118-01 | ND |
2016-02-01 | L160119-01 | ND |
2016-02-01 | L160119-03I | ND |
2016-02-01 | L160119-04I | ND |
2016-02-02 | L160122-01I | ND |
2016-02-02 | L160122-02I | ND |
2016-02-02 | L160122-03I | ND |
2016-02-02 | L160122-04I | ND |
2016-02-02 | L160122-05I | ND |
2016-02-03 | L160123-01I | ND |
2016-02-03 | L160123-04I | ND |
2016-02-04 | L160125-01I | ND |
2016-02-04 | L160125-02I | ND |
2016-02-04 | L160125-03I | ND |
2016-02-04 | L160125-04I | ND |
2016-02-08 | L160143-02I | ND |
2016-02-08 | L160143-03I | ND |
2016-02-08 | L160143-05I | ND |
2016-02-09 | L160144-02I | ND |
2016-02-09 | L160144-03I | ND |
2016-02-09 | L160144-04I | ND |
2016-02-09 | L160144-05I | ND |
2016-02-10 | L160145-03I | ND |
2016-02-10 | L160145-04I | ND |
2016-02-10 | L160145-05I | ND |
2016-02-11 | L160148-01 | ND |
2016-02-11 | L160148-02T | ND |
2016-02-11 | L160148-04T | ND |
2016-02-11 | L160148-05I | ND |
2016-02-11 | L160171-01I | ND |
2016-02-16 | L160172-03I | ND |
2016-02-16 | L160172-04I | ND |
2016-02-17 | L160173-01I | ND |
2016-02-17 | L160173-02 | ND |
2016-02-18 | L160178-04 | ND |
2016-02-23 | L160210-01 | ND |
2016-02-23 | L160210-02 | ND |
2016-02-23 | L160210-03 | ND |
2016-02-24 | L160211-01J | ND |
2016-02-24 | L160211-02J | ND |
2016-02-24 | L160211-03J | ND |
2016-02-25 | L160212-03 | ND |
2016-02-29 | L160245-01 | ND |
2016-02-29 | L160245-02 | ND |
2016-03-01 | L160246-03J | ND |
2016-03-02 | L160247-01 | ND |
2016-03-07 | L160268-02J | ND |
2016-03-10 | L160280-02J | ND |
2016-03-10 | L160280-03T | ND |
2016-04-20 | L160468-01 | ND |
2016-04-27 | L160497-05 | ND |
2016-04-28 | L160498-01 | ND |
2016-04-28 | L160498-02 | ND |
2016-04-28 | L160498-04 | ND |
2016-05-02 | L160516-01 | ND |
2016-05-03 | L160517-01 | ND |
2016-05-05 | L160525-02 | ND |
2016-05-31 | L160656-01I | ND |
2016-05-31 | L160656-02I | ND |
2016-06-14 | L160697-01I | ND |
2016-06-16 | L160723-01I | ND |
2016-10-04 | L161215-01 | ND |
2019-03-19 | L190423-01 IOC | ND |
2019-04-01 | L190499-02 | ND |
2019-04-01 | L190499-03 | ND |
2019-04-01 | L190499-05 | ND |
2019-04-01 | L190499-06 | ND |
2019-04-04 | L190541-01 | ND |
2019-04-11 | L190512-01 | ND |
2019-04-11 | L190512-02 | ND |
2019-04-11 | L190512-03 | ND |
2019-04-11 | L190512-04 | ND |
2019-04-15 | L190597-01 | ND |
2019-04-15 | L190597-02 | ND |
2019-04-15 | L190597-03 | ND |
2019-04-15 | L190597-04 | ND |
2019-04-17 | L190610-01 | ND |
2019-04-17 | L190610-03 | ND |
2019-04-18 | L190624-01 | ND |
2019-04-18 | L190624-02 | ND |
2019-04-18 | L190624-03 | ND |
2019-04-23 | L190640-01 | ND |
2019-04-23 | L190640-02 | ND |
2019-04-23 | L190640-03 | ND |
2019-04-23 | L190640-04 | ND |
2019-04-24 | L190645-02 | ND |
2019-04-24 | L190645-03 | ND |
2019-04-25 | L190648-01 | ND |
2019-04-25 | L190648-02 | ND |
2019-04-25 | L190648-03 | ND |
2019-04-30 | L190670-01 | ND |
2019-04-30 | L190670-02 | ND |
2019-05-01 | L190678-02 | ND |
2019-05-01 | L190678-03 | ND |
2019-05-01 | L190678-04 | ND |
2019-05-02 | L190690-01 | ND |
2019-05-02 | L190690-03 | ND |
2019-05-06 | L190704-03 | ND |
2019-05-07 | L190712-01 | ND |
2019-05-07 | L190712-02 | ND |
2019-05-07 | L190712-03 | ND |
2019-05-08 | L190725-01 | ND |
2019-05-08 | L190725-02 | ND |
2019-05-09 | L190728-01-20131 | ND |
2019-05-13 | L190741-01-20131 | ND |
2019-05-13 | L190741-02-20131 | ND |
2019-05-14 | L190748-02-20131 | ND |
2019-05-15 | L190761-01-20131 | ND |
2019-05-15 | L190761-02-20131 | ND |
2019-05-15 | L190761-03-20131 | ND |
2019-05-20 | L190783-02-20131 | ND |
2019-05-20 | L190783-03-20131 | ND |
2019-05-28 | L190813-01-06260 | ND |
2019-05-28 | L190813-02-06260 | ND |
2019-05-28 | L190813-03-06260 | ND |
2019-05-28 | L190813-04-06260 | ND |
2019-05-30 | L190835-01-06260 | ND |
2019-05-30 | L190835-02-06260 | ND |
2019-05-30 | L190835-03-06260 | ND |
2019-05-30 | L190835-04-06260 | ND |
2019-05-30 | L190835-05-06260 | ND |
2019-05-30 | L190835-06-06260 | ND |
2019-06-03 | L190837-01-06260 | ND |
2019-06-03 | L190837-02-06260 | ND |
2019-06-03 | L190837-03-06260 | ND |
2019-06-03 | L190837-04-06260 | ND |
2019-06-03 | L190837-05-06260 | ND |
2019-06-04 | L190851-01-06281 | ND |
2019-06-04 | L190851-03-06281 | ND |
2019-06-04 | L190851-04-06281 | ND |
2019-06-04 | L190851-05-06281 | ND |
2019-06-06 | L190879-01-06281 | ND |
2019-06-06 | L190879-02-06281 | ND |
2019-06-06 | L190879-03-06281 | ND |
2019-06-06 | L190879-04-06281 | ND |
2019-06-06 | L190879-05-06281 | ND |
2019-06-11 | L190893-01-06281 | ND |
2019-06-11 | L190893-02-06281 | ND |
2019-06-11 | L190893-03-06281 | ND |
2019-06-11 | L190893-04-06281 | ND |
2019-06-13 | L190907-01-07081 | ND |
2019-06-13 | L190907-02-07081 | ND |
2019-06-13 | L190907-03-07081 | ND |
2019-06-13 | L190907-04-07081 | ND |
2019-06-25 | L190968-01-07081 | ND |
2019-06-27 | L190983-01-08131 | ND |
2019-08-20 | L191266-01-10011 | ND |
2019-08-20 | L191266-02-10011 | ND |
2019-08-22 | L191282-01-10011 | ND |
2019-08-22 | L191282-02-10011 | ND |
2019-09-09 | L191400-01-10011 | ND |
2019-09-09 | L191400-02-10011 | ND |
2019-09-10 | L191408-01-10011 | ND |
2019-09-11 | L191425-01-10011 | ND |
2019-09-11 | L191425-02-10011 | ND |
2019-09-11 | L191425-03-10011 | ND |
2019-09-12 | L191433-01-10011 | ND |
2019-09-16 | L191452-01-10021 | ND |
2019-11-19 | L191822-01-01071 | ND |
2019-11-20 | L191829-01-01071 | ND |