Chromium (total)
Ephrata Area Joint Authority
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 | 3 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2018-04-09 | 8008753-01 | ND |
| 2018-04-09 | 8008770-01 | ND |
| 2018-04-09 | 8008754-01 | ND |
| 2019-04-01 | 9002714-01 | ND |
| 2020-10-14 | 23319945.00 | ND |
| 2021-01-06 | 23670516.00 | ND |
| 2021-01-28 | 23847283.00 | ND |
| 2021-05-07 | 24590692.00 | ND |
| 2021-08-09 | 25175341.00 | ND |
| 2022-04-12 | 26604765.00 | ND |
| 2023-04-04 | 28855379.00 | ND |