Chromium (total)
City of Elko
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.
84
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 | 1.03 ppb | 68 | 68 | 0.470 ppb - 4.10 ppb |
| 2016 | 2.14 ppb | 7 | 5 | ND - 4.00 ppb |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | 1.000 ppb | 1 | 1 | 1.000 ppb |
| 2019 | 0.500 ppb | 8 | 3 | ND - 2.00 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 |
|---|---|---|
| 2015-05-11 | A5E0070-19A | 0.760 ppb |
| 2015-05-11 | A5E0070-22A | 0.660 ppb |
| 2015-05-11 | A5E0070-25A | 0.550 ppb |
| 2015-05-11 | A5E0070-07A | 1.40 ppb |
| 2015-05-11 | A5E0070-10A | 1.30 ppb |
| 2015-05-11 | A5E0070-01A | 0.810 ppb |
| 2015-05-11 | A5E0070-04A | 1.000 ppb |
| 2015-05-11 | A5E0070-13A | 0.930 ppb |
| 2015-05-12 | A5E0070-31A | 0.810 ppb |
| 2015-05-12 | A5E0070-64A | 0.830 ppb |
| 2015-05-12 | A5E0070-34A | 0.930 ppb |
| 2015-05-12 | A5E0070-28A | 1.60 ppb |
| 2015-05-12 | A5E0070-84A | 0.770 ppb |
| 2015-05-12 | A5E0070-58A | 0.950 ppb |
| 2015-05-12 | A5E0070-16A | 2.40 ppb |
| 2015-05-12 | A5E0070-72A | 0.920 ppb |
| 2015-05-12 | A5E0070-43A | 0.950 ppb |
| 2015-05-12 | A5E0070-70A | 0.960 ppb |
| 2015-05-12 | A5E0070-40A | 0.650 ppb |
| 2015-05-12 | A5E0070-82A | 0.800 ppb |
| 2015-05-12 | A5E0070-78A | 0.660 ppb |
| 2015-05-12 | A5E0070-66A | 0.750 ppb |
| 2015-05-12 | A5E0070-68A | 0.470 ppb |
| 2015-05-12 | A5E0070-62A | 0.850 ppb |
| 2015-05-12 | A5E0070-46A | 0.920 ppb |
| 2015-05-12 | A5E0070-74A | 1.30 ppb |
| 2015-05-13 | A5E0070-37A | 0.800 ppb |
| 2015-05-13 | A5E0070-76A | 0.870 ppb |
| 2015-05-13 | A5E0070-56A | 1.30 ppb |
| 2015-05-13 | A5E0070-54A | 2.00 ppb |
| 2015-05-13 | A5E0070-52A | 0.960 ppb |
| 2015-05-13 | A5E0070-60A | 0.850 ppb |
| 2015-05-13 | A5E0070-80A | 0.980 ppb |
| 2015-05-26 | A5E1661-01A | 1.000 ppb |
| 2015-11-16 | A5J2251-10A | 1.30 ppb |
| 2015-11-16 | A5J2251-43A | 0.990 ppb |
| 2015-11-16 | A5J2251-78A | 1.000 ppb |
| 2015-11-16 | A5J2251-80A | 1.10 ppb |
| 2015-11-16 | A5J2251-58A | 1.10 ppb |
| 2015-11-16 | A5J2251-40A | 0.660 ppb |
| 2015-11-16 | A5J2251-74A | 1.000 ppb |
| 2015-11-16 | A5J2251-76A | 4.10 ppb |
| 2015-11-16 | A5J2251-37A | 0.530 ppb |
| 2015-11-16 | A5J2251-34A | 0.540 ppb |
| 2015-11-17 | A5J2251-60A | 0.890 ppb |
| 2015-11-17 | A5J2251-01A | 1.20 ppb |
| 2015-11-17 | A5J2251-07A | 0.970 ppb |
| 2015-11-17 | A5J2251-49A | 1.10 ppb |
| 2015-11-17 | A5J2251-84A | 0.680 ppb |
| 2015-11-17 | A5J2251-46A | 0.980 ppb |
| 2015-11-17 | A5J2251-52A | 1.000 ppb |
| 2015-11-17 | A5J2251-56A | 1.10 ppb |
| 2015-11-17 | A5J2251-70A | 1.10 ppb |
| 2015-11-17 | A5J2251-28A | 3.10 ppb |
| 2015-11-17 | A5J2251-13A | 1.30 ppb |
| 2015-11-18 | A5J2251-04A | 1.000 ppb |
| 2015-11-18 | A5J2251-62A | 0.590 ppb |
| 2015-11-18 | A5J2251-66A | 0.600 ppb |
| 2015-11-18 | A5J2251-64A | 0.580 ppb |
| 2015-11-18 | A5J2251-68A | 0.600 ppb |
| 2015-11-18 | A5J2251-22A | 0.820 ppb |
| 2015-11-18 | A5J2251-19A | 0.830 ppb |
| 2015-11-18 | A5J2251-16A | 1.50 ppb |
| 2015-11-18 | A5J2251-54A | 1.40 ppb |
| 2015-11-18 | A5J2251-72A | 1.000 ppb |
| 2015-11-18 | A5J2251-31A | 0.790 ppb |
| 2015-11-18 | A5J2251-25A | 0.550 ppb |
| 2015-12-03 | A5K1960-02A | 0.590 ppb |
| 2016-03-23 | S201603-0984 | 2.00 ppb |
| 2016-05-02 | S201605-0068 | 3.00 ppb |
| 2016-05-02 | S201605-0070 | 3.00 ppb |
| 2016-06-01 | S201606-0092 | 3.00 ppb |
| 2016-06-01 | S201606-0094 | ND |
| 2016-06-01 | S201606-0096 | ND |
| 2016-06-28 | S201606-1371 | 4.00 ppb |
| 2018-08-07 | 18080411-01 | 1.000 ppb |
| 2019-07-27 | 19081514-01 | 2.00 ppb |
| 2019-08-19 | B19081921-001 | ND |
| 2019-08-20 | B19082034-001 | ND |
| 2019-08-21 | B19082173-001 | ND |
| 2019-08-27 | 19081513-01 | 1.000 ppb |
| 2019-08-27 | 19081605-01 | ND |
| 2019-08-28 | 19081589-01 | 1.000 ppb |
| 2019-08-28 | 19081592-01 | ND |