Chromium (hexavalent)
City of Tucson
Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).
59
Samples
0
Samples exceeding legal limit (MCL)
59
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | 0.649 ppb | 59 | 59 | 0.0450 ppb - 2.30 ppb |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.02 ppb
The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2013-04-10 | 201304110657AM | 0.870 ppb |
| 2013-04-10 | 201304110659AM | 1.20 ppb |
| 2013-04-15 | 201304160056AM | 2.00 ppb |
| 2013-04-15 | 201304160054AM | 0.340 ppb |
| 2013-04-15 | 201304160050AM | 1.40 ppb |
| 2013-04-15 | 201304160052AM | 1.60 ppb |
| 2013-04-16 | 201304180586AM | 1.50 ppb |
| 2013-04-16 | 201304180594AM | 1.10 ppb |
| 2013-04-16 | 201304180588AM | 0.130 ppb |
| 2013-04-16 | 201304180590AM | 2.10 ppb |
| 2013-04-17 | 201304190458AM | 0.230 ppb |
| 2013-04-17 | 201304190460AM | 0.0580 ppb |
| 2013-04-17 | 201304190462AM | 0.620 ppb |
| 2013-04-22 | 201304240197AM | 0.630 ppb |
| 2013-04-22 | 201304240201AM | 0.160 ppb |
| 2013-04-22 | 201304240199AM | 0.240 ppb |
| 2013-04-22 | 201304240203AM | 0.260 ppb |
| 2013-04-23 | 201304250529AM | 0.820 ppb |
| 2013-04-23 | 201304250523AM | 0.200 ppb |
| 2013-04-23 | 201304250527AM | 1.10 ppb |
| 2013-04-23 | 201304250525AM | 0.310 ppb |
| 2013-04-24 | 201304260166AM | 0.210 ppb |
| 2013-04-24 | 201304260164AM | 0.410 ppb |
| 2013-04-24 | 201304260162AM | 0.0510 ppb |
| 2013-04-29 | 201305010447AM | 0.0450 ppb |
| 2013-04-29 | 201305010449AM | 0.250 ppb |
| 2013-04-29 | 201305020190AM | 0.190 ppb |
| 2013-04-29 | 201305010451AM | 0.0460 ppb |
| 2013-04-29 | 201305010177AM | 0.620 ppb |
| 2013-04-29 | 201305010206AM | 1.000 ppb |
| 2013-10-08 | 201310120150AM | 0.300 ppb |
| 2013-10-08 | 201310110331AM | 0.220 ppb |
| 2013-10-08 | 201310110333AM | 0.200 ppb |
| 2013-10-08 | 201310110335AM | 0.230 ppb |
| 2013-10-08 | 201310120152AM | 0.180 ppb |
| 2013-10-08 | 201310110337AM | 0.780 ppb |
| 2013-10-09 | 201310120156AM | 0.280 ppb |
| 2013-10-09 | 201310120162AM | 1.10 ppb |
| 2013-10-09 | 201310120160AM | 1.000 ppb |
| 2013-10-09 | 201310120154AM | 0.240 ppb |
| 2013-10-09 | 201310120158AM | 0.130 ppb |
| 2013-10-14 | 201310150054AM | 1.60 ppb |
| 2013-10-14 | 201310150052AM | 1.20 ppb |
| 2013-10-14 | 201310150056AM | 0.320 ppb |
| 2013-10-14 | 201310150058AM | 1.80 ppb |
| 2013-10-16 | 201310170122AM | 0.620 ppb |
| 2013-10-16 | 201310170124AM | 0.130 ppb |
| 2013-10-16 | 201310170126AM | 2.30 ppb |
| 2013-10-16 | 201310170118AM | 0.180 ppb |
| 2013-10-16 | 201310170120AM | 0.310 ppb |
| 2013-10-17 | 201310180355AM | 0.0520 ppb |
| 2013-10-17 | 201310180359AM | 0.190 ppb |
| 2013-10-17 | 201310180357AM | 0.340 ppb |
| 2013-10-29 | 201310300082AM | 0.630 ppb |
| 2013-10-29 | 201310300076AM | 0.600 ppb |
| 2013-10-29 | 201310300078AM | 0.590 ppb |
| 2013-10-29 | 201310300074AM | 0.640 ppb |
| 2013-10-29 | 201310300080AM | 0.530 ppb |
| 2013-11-20 | 201311220543AM | 1.90 ppb |