Chromium (total)
Southern Okla Water Corp
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.
57
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | 0.254 ppb | 38 | 32 | ND - 0.578 ppb |
| 2016 | ND | 10 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | 0.578 ppb | 9 | 2 | ND - 4.10 ppb |
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 |
|---|---|---|
| 2015-03-02 | 5C03074-19 | 0.241 ppb |
| 2015-03-02 | 5C03074-31 | 0.206 ppb |
| 2015-03-02 | 5C03074-10 | 0.304 ppb |
| 2015-03-02 | 5C03074-27 | 0.400 ppb |
| 2015-03-02 | 5C03074-25 | ND |
| 2015-03-02 | 5C03074-39 | 0.318 ppb |
| 2015-03-02 | 5C03074-07 | 0.244 ppb |
| 2015-03-02 | 5C03074-22 | ND |
| 2015-03-02 | 5C03074-16 | 0.268 ppb |
| 2015-03-02 | 5C03074-13 | ND |
| 2015-03-02 | 5C03074-04 | 0.230 ppb |
| 2015-03-02 | 5C03074-29 | 0.276 ppb |
| 2015-03-02 | 5C03074-35 | 0.260 ppb |
| 2015-03-02 | 5C03074-37 | 0.335 ppb |
| 2015-03-02 | 5C03074-01 | ND |
| 2015-03-02 | 5C03074-33 | 0.306 ppb |
| 2015-06-01 | 5F02105-05 | 0.444 ppb |
| 2015-06-01 | 5F02105-03 | ND |
| 2015-06-01 | 5F02105-01 | 0.477 ppb |
| 2015-06-01 | 5F02105-08 | 0.235 ppb |
| 2015-09-14 | 5I15117-22 | 0.251 ppb |
| 2015-09-14 | 5I15117-04 | 0.212 ppb |
| 2015-09-14 | 5I15117-29 | 0.294 ppb |
| 2015-09-14 | 5I15117-31 | 0.219 ppb |
| 2015-09-14 | 5I15117-35 | 0.228 ppb |
| 2015-09-14 | 5I15117-33 | 0.286 ppb |
| 2015-09-14 | 5I15117-37 | 0.296 ppb |
| 2015-09-14 | 5I15117-39 | 0.307 ppb |
| 2015-09-14 | 5I15117-10 | 0.235 ppb |
| 2015-09-14 | 5I15117-16 | 0.229 ppb |
| 2015-09-14 | 5I15117-13 | 0.578 ppb |
| 2015-09-14 | 5I15117-19 | 0.556 ppb |
| 2015-09-22 | 5I22073-01 | 0.375 ppb |
| 2015-10-06 | 5J06078-01 | ND |
| 2015-12-07 | 5L08085-09 | 0.263 ppb |
| 2015-12-07 | 5L08085-07 | 0.252 ppb |
| 2015-12-07 | 5L08085-01 | 0.233 ppb |
| 2015-12-07 | 5L08085-04 | 0.277 ppb |
| 2016-01-04 | 1601066 | ND |
| 2016-01-04 | 1601064 | ND |
| 2016-01-04 | 1601062 | ND |
| 2016-01-04 | 1601056 | ND |
| 2016-01-04 | 1601068 | ND |
| 2016-01-05 | 1601070 | ND |
| 2016-01-05 | 1601060 | ND |
| 2016-01-05 | 1601058 | ND |
| 2016-01-05 | 1601054 | ND |
| 2016-02-12 | 1602517 | ND |
| 2019-01-22 | 1901614 | ND |
| 2019-01-22 | 1901613 | ND |
| 2019-01-22 | 1901615 | ND |
| 2019-01-22 | 1901612 | 4.10 ppb |
| 2019-01-22 | 1901611 | 1.10 ppb |
| 2019-01-22 | 1901610 | ND |
| 2019-01-22 | 1901609 | ND |
| 2019-01-22 | 1901616 | ND |
| 2019-02-07 | 1902221 | ND |