Idaho (US-ID)
Market Type: Regulated (No Retail Choice)
SSS Relevance: ⭐⭐⭐ High — Extensive legacy hydroelectric resources, clean grid baseline
Grid Carbon Intensity: ~142–249 gCO₂/kWh (significantly below US average ~380)
1. Overview
Idaho's electricity market features low retail rates, high renewable penetration, and significant reliance on hydroelectric power. As of 2024, approximately 69% of Idaho's in-state generation came from renewable sources, ranking the state fifth nationally.
| Metric | Value | Source |
|---|---|---|
| Renewable share | 69% (2024) | EIA |
| Hydroelectric | 44.7% of generation | EIA |
| Natural gas | 31% | EIA |
| Wind | 15.4% | EIA |
| Grid carbon intensity | ~142–249 gCO₂eq/kWh | Various |
| Net importer | Yes (33–40% of supply) | EIA |
Retail Rates (March 2026):
- Residential: 10.04 ¢/kWh
- Commercial: 8.19 ¢/kWh
- Industrial: 6.66 ¢/kWh
Idaho consistently maintains some of the lowest electricity rates in the U.S., driven by abundant hydroelectric resources.
SSS Relevance
Idaho is highly relevant for SSS claims due to:
- Extensive legacy hydro — 44%+ of generation from hydroelectric facilities, most built pre-2000
- Clean grid baseline — Carbon intensity well below national average
- No RPS complications — Utilities not retiring RECs for state compliance
- Active pilot — Micron ↔ Idaho Power engagement underway
2. Market Structure
Retail Choice
None — Idaho operates under a regulated monopoly model. Customers must purchase electricity from their designated utility, with rates overseen by the Idaho Public Utilities Commission (IPUC).
Utility Types
| Type | Examples | Regulation | % of Consumers |
|---|---|---|---|
| Investor-Owned (IOU) | Idaho Power, Avista, Rocky Mountain Power | IPUC regulated | ~84% |
| Municipal | Idaho Falls Power, Burley, Rupert, Weiser | City council oversight | ~8% |
| Cooperative | Kootenai Electric, Fall River, Clearwater Power, Northern Lights | Member-elected boards | ~8% |
Idaho Power is the largest utility, serving approximately 58% of the state's electrical load including the Boise/Treasure Valley region.
ISO/RTO Membership
Idaho is not part of a full RTO/ISO. The grid is managed by individual Balancing Authorities:
- Bonneville Power Administration (BPA) — Federal power marketing
- Idaho Power — Joined Western Energy Imbalance Market (WEIM) in April 2018
- EDAM participation — Idaho Power announced intent to join CAISO's Extended Day-Ahead Market (March 2024)
3. Clean Energy Policy
State Mandates
None — Idaho has no mandatory Renewable Portfolio Standard (RPS) or voluntary renewable goal. It is one of only two Western states (with Wyoming) without such a policy.
SSS Implications
The absence of an RPS simplifies SSS eligibility analysis:
- Utilities are not retiring RECs for state compliance purposes
- Legacy hydro and other CFE resources are generally available for pro-rata allocation
- No RPS retirement complications to navigate
Utility Voluntary Commitments
| Utility | Goal | Target Date |
|---|---|---|
| Idaho Power | 100% clean energy | 2045 |
| Avista | 100% clean electricity | 2045 |
Idaho Power has also committed to exit coal-fired generation by 2030.
Renewable Production & RECs
Because Idaho lacks an RPS, utilities like Idaho Power often sell RECs to utilities in states with mandates (Oregon, Washington), using revenue to lower rates for Idaho customers. This practice does not affect SSS eligibility for the underlying generation.
Key Legislation (2023–2025)
- HB 96: Promotes clean energy resources including nuclear, hydrogen, biomass, geothermal
- HB 86/HB 660: Prohibit local EV charging mandates and stricter-than-state energy codes
- SB 1133: Prohibits wind/solar on designated Agricultural Protection Areas
- Solar compensation (2025): IPUC approved ~30% reduction in rooftop solar export rates
Tax Incentives
- 40% income tax deduction for solar, wind, geothermal, or biomass devices (year of installation, capped at $5,000)
- 20% deductions available for subsequent three years
- Low-interest loans for energy efficiency and renewable projects via Office of Energy and Mineral Resources
4. Utility Landscape
Investor-Owned Utilities
| Utility | Service Territory | % of State Load | Clean Energy Goal |
|---|---|---|---|
| Idaho Power | Southern Idaho, Eastern Oregon | ~58% | 100% clean by 2045 |
| Avista Utilities | Northern Idaho (Coeur d'Alene, Moscow) | ~15% | 100% clean by 2045 |
| Rocky Mountain Power | Eastern Idaho | ~11% | PacifiCorp-wide transition |
Consumer-Owned Utilities
Represented by the Idaho Consumer-Owned Utilities Association (ICUA), serving ~16% of consumers:
Rural Electric Cooperatives:
- Kootenai Electric Cooperative (KEC)
- Northern Lights Inc.
- Fall River Rural Electric Cooperative
- Clearwater Power Company
- United Electric Co-op
Municipal Utilities:
- Idaho Falls Power
- Burley, Rupert, Weiser, Heyburn municipal systems
Consumer-owned utilities are generally exempt from IPUC rate regulation and governed by elected boards or city councils.
5. SSS-Eligible Resources
Summary
| Resource Type | % of Generation | SSS Classification | Notes |
|---|---|---|---|
| Hydroelectric | 44–54% | Clearly SSS | Legacy infrastructure, 114+ facilities |
| Wind | 15–16% | Gray Area | Depends on REC status |
| Solar | ~7% | Gray Area | Utility-scale expanding |
| Geothermal/Biomass | ~2% | Gray Area | Small contribution |
| Nuclear | 0% | N/A | No commercial plants |
Hydroelectric (Clearly SSS)
Idaho's hydroelectric infrastructure represents the primary SSS-eligible resource base. Total capacity exceeds 3,000 MW across 114+ generating facilities.
Idaho Power Hydroelectric Facilities
| Facility | Capacity (MW) | Year Built | SSS Classification |
|---|---|---|---|
| Brownlee Dam | 675 | 1959 | Clearly SSS |
| Hells Canyon Dam | 411 | 1967 | Clearly SSS |
| Oxbow Dam | 190 | 1961 | Clearly SSS |
| Dworshak Dam | 400 | 1973 | Clearly SSS |
| American Falls | 92 | 1927/1976 | Clearly SSS |
| C.J. Strike | 83 | 1952 | Clearly SSS |
| Bliss | 75 | 1950 | Clearly SSS |
| Lower Salmon Falls | 60 | 1910/1949 | Clearly SSS |
| Milner | 59 | 1992 | Gray Area (newer) |
The Hells Canyon Complex (Brownlee, Oxbow, Hells Canyon dams) accounts for roughly 70% of Idaho Power's total hydro generation.
SSS Classification Rationale:
- Facilities built before 2000 → Clearly SSS (legacy generation)
- Facilities built after 2000 → Gray Area (requires verification of REC retirement status)
Nuclear
Idaho currently has no commercial nuclear power plants providing electricity to the public grid.
Idaho National Laboratory (INL):
- Operates four research reactors (ATR, TREAT, etc.)
- Federal facility — does not provide commercial power
- Future projects: MARVEL Microreactor (planned 2026/2027), Oklo Aurora Powerhouse
Wind & Solar
- Wind: 500+ turbines, ~15% of generation — SSS eligibility depends on whether RECs have been sold
- Solar: Utility-scale expanding rapidly — same REC dependency applies
6. References
- U.S. Energy Information Administration (EIA) — Idaho State Energy Profile
- Idaho Public Utilities Commission — Utility Regulation
- Idaho Power — Clean Energy Goal, Hydroelectric Operations
- Idaho Capital Sun — Energy Policy Coverage
- Clean Energy Transition Institute — Idaho Utility Landscape
- Idaho Consumer-Owned Utilities Association (ICUA)
- Idaho Office of Energy and Mineral Resources (OEMR)
Last updated: March 2026
Data sources: EIA, IPUC, utility filings, SerpAPI research