Chromium (hexavalent)
Mesa Water District
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).
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | 0.145 ppb | 2 | 2 | 0.0600 ppb - 0.230 ppb |
2014 | 0.226 ppb | 20 | 14 | ND - 0.680 ppb |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 5 | 0 | ND |
2017 | ND | 9 | 0 | ND |
2018 | ND | 1 | 0 | ND |
2019 | ND | 5 | 0 | ND |
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 |
---|---|---|
2013-09-03 | 3010004823-3 | 0.0600 ppb |
2013-09-04 | 3010004997-3 | 0.230 ppb |
2014-01-06 | 3010004813-1 | 0.120 ppb |
2014-01-06 | 3010004807-1 | 0.270 ppb |
2014-01-06 | 3010004822-1 | 0.530 ppb |
2014-01-06 | 3010004812-1 | 0.380 ppb |
2014-01-06 | 3010004825-1 | ND |
2014-01-06 | 3010004995-1 | 0.190 ppb |
2014-01-06 | 3010004998-1 | 0.240 ppb |
2014-01-06 | 3010004824-1 | 0.150 ppb |
2014-05-05 | 4417-008-0830 | ND |
2014-05-05 | 4417-014-0930 | ND |
2014-05-05 | 4417-010-0945 | ND |
2014-05-05 | 4417-007-0915 | ND |
2014-06-09 | 3010004824-2 | 0.200 ppb |
2014-06-09 | 3010004812-2 | 0.680 ppb |
2014-06-09 | 3010004807-2 | 0.320 ppb |
2014-06-09 | 3010004825-2 | ND |
2014-06-09 | 3010004995-2 | 0.290 ppb |
2014-06-09 | 3010004998-2 | 0.340 ppb |
2014-06-09 | 3010004822-2 | 0.630 ppb |
2014-06-09 | 3010004813-2 | 0.170 ppb |
2016-02-10 | 4417-010-1025 | ND |
2016-05-09 | 4417-012-1015 | ND |
2016-05-11 | 4417-014-0820 | ND |
2016-06-16 | 4417-006-0940 | ND |
2016-09-20 | 4417-006-0915 | ND |
2017-02-21 | 4417-040-0850 | ND |
2017-05-08 | 4417-008-0810 | ND |
2017-05-08 | 4417-040-0930 | ND |
2017-06-20 | 4417-006-0810 | ND |
2017-07-12 | 4417-006-1100 | ND |
2017-08-24 | 4417-040-0835 | ND |
2017-10-02 | 4417-040-0810 | ND |
2017-10-12 | 4417-007-0810 | ND |
2017-10-30 | 4417-006-0740 | ND |
2018-03-07 | 4417-006-0940 | ND |
2019-02-11 | 4417-006-0835 | ND |
2019-05-20 | 4417-010-1000 | ND |
2019-05-29 | 4417-014-0820 | ND |
2019-07-09 | 4417-006-1000 | ND |
2019-07-29 | 4417-012-0825 | ND |