Cadmium
CTWC - Shoreline Region-Guilford System
Cadmium is a toxic metal found in food and drinking water. It has been linked to kidney toxicity, bone damage, cancer, and damage to developing fetuses.
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 | 2 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 6 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 3 | 0 | ND |
| 2023 | ND | 9 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.04 ppb
The EWG Health Guideline of 0.04 ppb for cadmium was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.
EPA Maximum Contaminant
Level (MCL): 5 ppb
The legal limit for cadmium, established in 1991, was based on research studies of cadmium toxicity conducted in the 1970s. This limit may not fully protect against the risk of cancer due to cadmium exposure.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-03-30 | CA11463IOCR | ND |
| 2018-03-30 | CA11466IOC1 | ND |
| 2019-01-30 | IOC1 200520057 | ND |
| 2019-02-27 | IOCR 200523002 | ND |
| 2019-06-24 | IOC1 200537625 | ND |
| 2019-07-10 | IOC1 200539998 | ND |
| 2020-01-20 | IOC1 200563509 | ND |
| 2020-01-21 | IOC1 200563516 | ND |
| 2020-01-28 | IOC1 200564212 | ND |
| 2020-02-11 | IOC1 200565799 | ND |
| 2020-02-11 | IOCR 200565797 | ND |
| 2020-02-25 | IOC1 200567275 | ND |
| 2021-09-30 | R300072099 300072102 | ND |
| 2021-09-30 | I300072093 300072096 | ND |
| 2022-08-15 | CM05636 | ND |
| 2022-08-29 | CM17830 | ND |
| 2022-08-29 | CM17831 | ND |
| 2023-02-13 | CN41858 | ND |
| 2023-02-13 | CN41859 | ND |
| 2023-06-07 | CO22566 | ND |
| 2023-09-12 | CO95874 | ND |
| 2023-09-12 | CO95875 | ND |
| 2023-09-12 | CO95877 | ND |
| 2023-10-12 | CP23629 | ND |
| 2023-11-28 | CP55320 | ND |
| 2023-11-29 | CP56434 | ND |