Chromium (total)
Middletown Water Department
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 | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 4 | 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 |
|---|---|---|
| 2018-03-01 | IOCR 200489002 | ND |
| 2018-03-01 | IOC1 200489001 | ND |
| 2018-04-16 | IOC1 200492152 | ND |
| 2018-04-16 | IOCR 200492151 | ND |
| 2019-05-13 | IOC1 200531892 | ND |
| 2019-05-13 | IOCR 200531894 | ND |
| 2019-05-21 | IOC1 200533082 | ND |
| 2019-05-21 | IOCR 200533084 | ND |
| 2020-05-06 | IOC1 200574724 | ND |
| 2020-05-06 | IOCR 200574725 | ND |
| 2020-05-14 | IOC1 200575834 | ND |
| 2020-05-14 | IOCR 200575835 | ND |
| 2021-03-30 | IOC1 200611335 | ND |
| 2021-03-30 | IOCR 200611337 | ND |
| 2021-03-30 | IOC1 200611336 | ND |
| 2021-04-07 | IOCR 200612106 | ND |
| 2022-05-11 | E300182524 300182533 | ND |
| 2022-05-11 | E300182526 300182546 | ND |
| 2022-05-11 | I300182528 300182552 | ND |
| 2022-05-11 | I300182529 300182557 | ND |
| 2023-06-23 | E300370712 300370715 | ND |
| 2023-06-23 | E300370718 300370721 | ND |
| 2023-06-23 | I300370724 300370727 | ND |
| 2023-06-23 | I300370731 300370734 | ND |