Chromium (total)
State College Boro Water Auth.
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 | 5 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 9 | 0 | ND |
| 2022 | ND | 3 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2018-02-14 | 8B14175-02 | ND |
| 2018-02-14 | 8B14175-03 | ND |
| 2018-02-14 | 8B14175-04 | ND |
| 2018-02-14 | 8B14175-05 | ND |
| 2018-02-14 | 8B14175-01 | ND |
| 2019-02-12 | 9B12142-01 | ND |
| 2020-02-12 | 21735717.00 | ND |
| 2021-02-16 | 23954025.00 | ND |
| 2021-02-16 | 23954036.00 | ND |
| 2021-02-16 | 23954047.00 | ND |
| 2021-02-16 | 23954058.00 | ND |
| 2021-02-16 | 23954014.00 | ND |
| 2021-04-07 | 24321987.00 | ND |
| 2021-08-16 | 25098854.00 | ND |
| 2021-09-13 | 25291490.00 | ND |
| 2021-11-15 | 25654956.00 | ND |
| 2022-02-15 | 26182626.00 | ND |
| 2022-09-01 | 27520774.00 | ND |
| 2022-11-16 | 27890883.00 | ND |
| 2023-02-14 | 28415042.00 | ND |
| 2023-05-15 | 28981477.00 | ND |
| 2023-08-14 | 29578250.00 | ND |
| 2023-11-13 | 30139883.00 | ND |