GREENHORN SUBD
Idaho — Community Water System — PWSID: ID5070020
System Information
| PWSID | ID5070020 |
| System Name | GREENHORN SUBD |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jan 7, 1986 |
| Last Reported | Mar 25, 2026 |
Location & Contact
| State | Idaho |
| City | KETCHUM |
| ZIP Code | 83340 |
| Address | PO BOX 5793 |
| Organization | GILMOUR, JON |
| Phone | 208-720-5893 |
Population & Service
| Population Served | 75 |
| Service Connections | 29 |
Drinking Water Violations (105)
This water system has 105 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 2, 2025 | — | RPT | No | No | — | — | — | Unaddressed | — | — | |
| Jul 2, 2025 | — | RPT | No | No | — | — | — | Unaddressed | — | — | |
| Jul 1, 2024 | — | MR | No | No | — | TT | — | Resolved | Jan 26, 2025 | — | |
| Jul 1, 2024 | — | MR | No | No | — | TT | — | Resolved | Jan 26, 2025 | — | |
| Jul 1, 2024 | — | MR | No | No | — | TT | — | Resolved | Jan 26, 2025 | — | |
| Jan 1, 2024 | Jan 31, 2024 | MR | No | Yes | — | — | — | Resolved | Jan 31, 2024 | — | |
| Jan 1, 2024 | Jan 31, 2024 | MR | No | Yes | — | — | — | Resolved | Jan 31, 2024 | — | |
| Jan 1, 2024 | Jan 31, 2024 | MR | No | Yes | — | — | — | Resolved | Jan 31, 2024 | — | |
| Jan 1, 2024 | Apr 1, 2024 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Apr 1, 2024 | — | |
| Jan 1, 2024 | Apr 1, 2024 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Apr 1, 2024 | — | |
| Jan 1, 2024 | Apr 1, 2024 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Apr 1, 2024 | — | |
| Aug 1, 2023 | Aug 31, 2023 | MR | No | Yes | — | — | — | Resolved | Aug 31, 2023 | — | |
| Aug 1, 2023 | Aug 31, 2023 | MR | No | Yes | — | — | — | Resolved | Aug 31, 2023 | — | |
| Aug 1, 2023 | Aug 31, 2023 | MR | No | Yes | — | — | — | Resolved | Aug 31, 2023 | — | |
| Aug 1, 2023 | Aug 31, 2023 | MON | No | Yes | — | — | — | Resolved | Aug 31, 2023 | — | |
| Aug 1, 2023 | Aug 31, 2023 | MON | No | Yes | — | — | — | Resolved | Aug 31, 2023 | — | |
| Aug 1, 2023 | Aug 31, 2023 | MON | No | Yes | — | — | — | Resolved | Aug 31, 2023 | — | |
| Jul 1, 2023 | Sep 30, 2023 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2023 | — | |
| Jul 1, 2023 | Sep 30, 2023 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2023 | — | |
| Jul 1, 2023 | Sep 30, 2023 | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2023 | — | |
| Jul 1, 2022 | — | MR | No | No | — | TT | — | Resolved | Feb 5, 2024 | — | |
| Jul 1, 2022 | — | MR | No | No | — | TT | — | Resolved | Feb 5, 2024 | — | |
| Jul 1, 2022 | — | MR | No | No | — | TT | — | Resolved | Feb 5, 2024 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MCL | Yes | No | .15 MG/L | 0.060 mg/L | .06 | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MCL | Yes | No | .15 MG/L | 0.060 mg/L | .06 | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MCL | Yes | No | .15 MG/L | 0.060 mg/L | .06 | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MCL | Yes | No | .275 MG/L | 0.060 mg/L | .06 | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MCL | Yes | No | .275 MG/L | 0.060 mg/L | .06 | Resolved | Jun 30, 2020 | — | |
| Apr 1, 2020 | Jun 30, 2020 | MCL | Yes | No | .275 MG/L | 0.060 mg/L | .06 | Resolved | Jun 30, 2020 | — | |
| Jan 1, 2020 | Mar 31, 2020 | MCL | Yes | No | .15 MG/L | 0.060 mg/L | .06 | Resolved | Mar 31, 2020 | — | |
| Jan 1, 2020 | Mar 31, 2020 | MCL | Yes | No | .15 MG/L | 0.060 mg/L | .06 | Resolved | Mar 31, 2020 | — | |
| Jan 1, 2020 | Mar 31, 2020 | MCL | Yes | No | .15 MG/L | 0.060 mg/L | .06 | Resolved | Mar 31, 2020 | — | |
| Jan 1, 2020 | Mar 31, 2020 | MCL | Yes | No | .15 MG/L | 0.060 mg/L | .06 | Resolved | Mar 31, 2020 | — | |
| Jan 1, 2020 | Mar 31, 2020 | MCL | Yes | No | .275 MG/L | 0.060 mg/L | .06 | Resolved | Mar 31, 2020 | — | |
| Jan 1, 2020 | Mar 31, 2020 | MCL | Yes | No | .275 MG/L | 0.060 mg/L | .06 | Resolved | Mar 31, 2020 | — | |
| Jan 1, 2020 | Mar 31, 2020 | MCL | Yes | No | .275 MG/L | 0.060 mg/L | .06 | Resolved | Mar 31, 2020 | — | |
| Jan 1, 2020 | Mar 31, 2020 | MCL | Yes | No | .275 MG/L | 0.060 mg/L | .06 | Resolved | Mar 31, 2020 | — | |
| Oct 1, 2019 | Dec 31, 2019 | MCL | Yes | No | .15 MG/L | 0.060 mg/L | .06 | Resolved | Dec 31, 2019 | — | |
| Oct 1, 2019 | Dec 31, 2019 | MCL | Yes | No | .15 MG/L | 0.060 mg/L | .06 | Resolved | Dec 31, 2019 | — | |
| Oct 1, 2019 | Dec 31, 2019 | MCL | Yes | No | .15 MG/L | 0.060 mg/L | .06 | Resolved | Dec 31, 2019 | — | |
| Oct 1, 2019 | Dec 31, 2019 | MCL | Yes | No | .15 MG/L | 0.060 mg/L | .06 | Resolved | Dec 31, 2019 | — | |
| Oct 1, 2019 | Dec 31, 2019 | MCL | Yes | No | .275 MG/L | 0.060 mg/L | .06 | Resolved | Dec 31, 2019 | — | |
| Oct 1, 2019 | Dec 31, 2019 | MCL | Yes | No | .275 MG/L | 0.060 mg/L | .06 | Resolved | Dec 31, 2019 | — | |
| Oct 1, 2019 | Dec 31, 2019 | MCL | Yes | No | .275 MG/L | 0.060 mg/L | .06 | Resolved | Dec 31, 2019 | — | |
| Oct 1, 2019 | Dec 31, 2019 | MCL | Yes | No | .275 MG/L | 0.060 mg/L | .06 | Resolved | Dec 31, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MCL | Yes | No | .275 MG/L | 0.060 mg/L | .06 | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MCL | Yes | No | .275 MG/L | 0.060 mg/L | .06 | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MCL | Yes | No | .275 MG/L | 0.060 mg/L | .06 | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MCL | Yes | No | .275 MG/L | 0.060 mg/L | .06 | Resolved | Sep 30, 2019 | — | |
| Jul 1, 2019 | Sep 30, 2019 | MCL | Yes | No | .15 MG/L | 0.060 mg/L | .06 | Resolved | Sep 30, 2019 | — |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.