Chromium (total)
Bedford Consolidated Water District
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 | 0.550 ppb | 2 | 1 | ND - 1.10 ppb |
| 2019 | 1.80 ppb | 2 | 1 | ND - 3.60 ppb |
| 2020 | ND | 6 | 0 | ND |
| 2021 | 0.217 ppb | 6 | 1 | ND - 1.30 ppb |
| 2022 | ND | 6 | 0 | ND |
| 2023 | ND | 6 | 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 |
|---|---|---|
| 2018-03-01 | AU04286INP | 1.10 ppb |
| 2018-03-06 | AU04641INP | ND |
| 2019-03-14 | AV05216INP | 3.60 ppb |
| 2019-03-14 | AV05217INP | ND |
| 2020-02-04 | CF25916INP | ND |
| 2020-02-25 | CF37945INP | ND |
| 2020-02-25 | AW03863INP | ND |
| 2020-08-19 | AW16062-INP | ND |
| 2020-08-19 | AW16070-INP | ND |
| 2020-08-19 | AW16064-INP | ND |
| 2021-02-03 | AX02233-INP | ND |
| 2021-02-10 | CH60665-INP | ND |
| 2021-02-10 | CH60664-INP | ND |
| 2021-09-21 | AX19302-INP | ND |
| 2021-09-21 | AX19304-INP | 1.30 ppb |
| 2021-09-21 | AX19306-INP | ND |
| 2022-02-04 | CK30270-INP | ND |
| 2022-02-04 | CK30269-INP | ND |
| 2022-02-15 | AY02782-INP | ND |
| 2022-09-21 | AY17021-INP | ND |
| 2022-09-21 | AY17019-INP | ND |
| 2022-09-28 | AY17459-INP | ND |
| 2023-01-11 | AZ00705-INP | ND |
| 2023-02-08 | CN38787-INP | ND |
| 2023-02-08 | CN38788-INP | ND |
| 2023-08-29 | AZ15966-INP | ND |
| 2023-08-29 | AZ15964-INP | ND |
| 2023-08-29 | AZ15968-INP | ND |