Chromium (total)
El Paso County Water Control and Improvement District 4 Fabens
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | 2.15 ppb | 2 | 2 | 1.90 ppb - 2.40 ppb |
| 2021 | 1.80 ppb | 1 | 1 | 1.80 ppb |
| 2022 | 2.40 ppb | 1 | 1 | 2.40 ppb |
| 2023 | ND | 2 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2018-03-29 | Q1813099004 | ND |
| 2019-05-30 | Q1930372005 | ND |
| 2020-03-04 | Q2008217017 | 2.40 ppb |
| 2020-03-04 | Q2008217018 | 1.90 ppb |
| 2021-01-20 | Q2101450007 | 1.80 ppb |
| 2022-03-08 | Q2207996001 | 2.40 ppb |
| 2023-02-01 | Q2304220005 | ND |
| 2023-02-01 | Q2304220006 | ND |