Selenium in Treasure Valley drinking water
1 of 39 systems that tested for it in the last 36 months detected it. Selenium is an inorganic contaminant. Certified filters are in the list.
| System | County | 36 mo max | Latest | Status | Last sample |
|---|---|---|---|---|---|
| D and S Purple Sage Ranchettes | Canyon | 0.2ppb | ND | Detected | 2026-06-09 |
Limits
- Federal limit (MCL)
- 0.05 mg/L (50.0ppb)
- Health goal (MCLG)
- 50.0ppb
Selenium is an essential nutrient. However, some people who drink water containing selenium in excess of the MCL over many years could experience hair or fingernail losses, numbness in fingers or toes, or problems with their circulation.EPA, quoted.
Removal methods in the reference list: reverse osmosis, activated alumina. A method name is not a product certification.
544 groundwater zones in the region have confident (grade A or B) estimates for Selenium. See well estimates by ZIP.
Numbers are the system's samples at its taps and wells, not yours. Lead and copper are 90th percentiles from sampled homes. Well pages are nearby-sample estimates. Health text restates EPA and DEQ. Methodology.