Chromium (hexavalent)
Colbert County Rural Water System
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).
38
Samples
0
Samples exceeding legal limit (MCL)
37
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.415 ppb | 26 | 26 | 0.0330 ppb - 1.70 ppb |
| 2015 | 0.541 ppb | 12 | 11 | ND - 1.80 ppb |
| 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 |
|---|---|---|
| 2014-09-08 | 2028862014 | 1.30 ppb |
| 2014-09-08 | 2028862009 | 0.0430 ppb |
| 2014-09-08 | 2028862011 | 0.450 ppb |
| 2014-09-08 | 2028862013 | 0.0710 ppb |
| 2014-09-08 | 2028862015 | 0.0550 ppb |
| 2014-09-08 | 2028862003 | 1.30 ppb |
| 2014-09-08 | 2028862002 | 0.0660 ppb |
| 2014-09-16 | 2030134005 | 0.0400 ppb |
| 2014-09-16 | 2030134003 | 0.520 ppb |
| 2014-09-16 | 2030134001 | 0.570 ppb |
| 2014-09-16 | 2030134002 | 0.0410 ppb |
| 2014-09-16 | 2030134004 | 0.460 ppb |
| 2014-12-10 | 2044799026 | 1.70 ppb |
| 2014-12-10 | 2044799014 | 0.0700 ppb |
| 2014-12-10 | 2044799024 | 0.0710 ppb |
| 2014-12-10 | 2044799013 | 1.70 ppb |
| 2014-12-10 | 2044799003 | 0.530 ppb |
| 2014-12-10 | 2044799011 | 0.0610 ppb |
| 2014-12-10 | 2044799009 | 0.0420 ppb |
| 2014-12-10 | 2044799018 | 0.470 ppb |
| 2014-12-10 | 2044799005 | 0.460 ppb |
| 2014-12-10 | 2044799016 | 0.550 ppb |
| 2014-12-10 | 2044799007 | 0.0330 ppb |
| 2014-12-10 | 2044799001 | 0.110 ppb |
| 2014-12-10 | 2044799020 | 0.0340 ppb |
| 2014-12-10 | 2044799022 | 0.0370 ppb |
| 2015-03-23 | 2061790011 | 1.80 ppb |
| 2015-03-23 | 2061790017 | 0.550 ppb |
| 2015-03-23 | 2061790021 | 0.120 ppb |
| 2015-03-23 | 2061790023 | 1.80 ppb |
| 2015-03-23 | 2061790019 | ND |
| 2015-03-23 | 2061790013 | 0.110 ppb |
| 2015-03-23 | 2061790007 | 0.0900 ppb |
| 2015-03-23 | 2061790015 | 0.620 ppb |
| 2015-03-23 | 2061790009 | 0.120 ppb |
| 2015-03-23 | 2061790003 | 0.610 ppb |
| 2015-03-23 | 2061790005 | 0.550 ppb |
| 2015-03-23 | 2061790001 | 0.120 ppb |