Chromium (total)
Annapolis PWS
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 | 8 | 0 | ND |
| 2019 | ND | 8 | 0 | ND |
| 2020 | ND | 8 | 0 | ND |
| 2021 | ND | 8 | 0 | ND |
| 2022 | ND | 8 | 0 | ND |
| 2023 | ND | 8 | 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 |
|---|---|---|
| 2018-01-29 | AD11500 | ND |
| 2018-01-29 | AD11499 | ND |
| 2018-05-02 | AD18215 | ND |
| 2018-05-02 | AD18214 | ND |
| 2018-07-10 | AD29393 | ND |
| 2018-07-10 | AD29394 | ND |
| 2018-10-17 | AD34548 | ND |
| 2018-10-17 | AD34549 | ND |
| 2019-01-10 | AD37860 | ND |
| 2019-01-10 | AD37861 | ND |
| 2019-04-15 | AD46284 | ND |
| 2019-04-15 | AD46285 | ND |
| 2019-07-23 | AD52085 | ND |
| 2019-07-23 | AD52084 | ND |
| 2019-10-22 | AD56862 | ND |
| 2019-10-22 | AD56863 | ND |
| 2020-02-03 | AD60672 | ND |
| 2020-02-03 | AD60671 | ND |
| 2020-06-03 | 2010512 | ND |
| 2020-06-03 | 2010513 | ND |
| 2020-07-27 | 2011670 | ND |
| 2020-07-27 | 2011669 | ND |
| 2020-10-29 | 2016617 | ND |
| 2020-10-29 | 2016616 | ND |
| 2021-01-21 | 2020217 | ND |
| 2021-01-21 | 2020216 | ND |
| 2021-04-19 | 2103830 | ND |
| 2021-04-19 | 2103829 | ND |
| 2021-07-19 | 2113683 | ND |
| 2021-07-19 | 2113682 | ND |
| 2021-10-26 | 2118144 | ND |
| 2021-10-26 | 2118145 | ND |
| 2022-01-24 | 2122168 | ND |
| 2022-01-24 | 2122169 | ND |
| 2022-04-13 | 2204382 | ND |
| 2022-04-13 | 2204381 | ND |
| 2022-07-12 | 2214771 | ND |
| 2022-07-12 | 2214772 | ND |
| 2022-10-24 | 2219680 | ND |
| 2022-10-24 | 2219681 | ND |
| 2023-02-14 | 2301319 | ND |
| 2023-02-14 | 2301320 | ND |
| 2023-04-19 | 2303488 | ND |
| 2023-04-19 | 2303489 | ND |
| 2023-07-19 | 2311679 | ND |
| 2023-07-19 | 2311680 | ND |
| 2023-10-16 | 2316861 | ND |
| 2023-10-16 | 2316860 | ND |