CARMEL, Ind. — Today, MISO and the Organization of MISO States (OMS) released the 2025 OMS-MISO Survey results, reinforcing near-term resource adequacy risks as demand for electricity rises across the region. The survey projects that the MISO region could see resource sufficiency ranging from a 1.4 GW deficit to 6.4 GW surplus of Summer Accredited Capacity by the 2027/28 planning year. In addition, the survey findings emphasize a paradigm shift in seasonal risk is emerging. The increased penetration of solar generation within the resource mix and its operational characteristics mean that reliability risks are spreading beyond the summer season.
“The annual OMS-MISO Survey is a critical tool in informing real-world decisions that will guide our energy future. The collaboration between MISO and OMS ensures that the information shared is not just data, but another viewpoint that leads to actionable outcomes.” said Joe Sullivan, president of the Organization of MISO States and vice chair of the Minnesota Public Utilities Commission. “We see this year over year — the insights from this survey directly influence the strategies and reforms needed to address resource adequacy challenges and navigate the evolving energy landscape effectively.”
The annual survey provides a five-year resource adequacy outlook for the region and complements the MISO region’s broader reliability planning processes. Additional new inputs and key findings from the 2025 survey include:
"This survey reinforces the importance of accelerating new resource additions and carefully managing retirements as demand continues to grow," said John Bear, MISO’s President and CEO. "OMS has been instrumental in the progress we’re making in our Reliability Imperative efforts. We will continue working with our stakeholders to evolve our tools and processes to support a reliable grid of the future.”
The OMS-MISO survey assesses anticipated generating capacity over a five-year planning horizon (2025/26 through 2029/30) and is a key resource in MISO’s long-term reliability planning toolkit. This year’s results align with MISO’s Planning Resource Auction and Futures analyses, providing a comprehensive view of system risks and resource needs.
MISO will host a stakeholder workshop to review the 2025 OMS-MISO Survey results on Friday, June 6, at 3 p.m. EDT. For more information, visit misoenergy.org.
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About Organization of MISO States
The Organization of MISO States Inc. is a non-profit, self-governing organization of representatives from each state with regulatory jurisdiction over entities participating in the Midcontinent Independent System Operator, Inc. (MISO), a regional transmission organization as defined by the Federal Energy Regulatory Commission (FERC). The purpose of the OMS is to coordinate regulatory oversight among the states, including recommendations to MISO, the MISO Board of Directors, the FERC, other relevant government entities and state commissions as appropriate.
Midcontinent Independent System Operator (MISO) is an independent, not-for-profit organization that delivers safe, cost-effective electric power across 15 U.S. states and the Canadian province of Manitoba. 45 million people depend on MISO to generate and transmit the right amount of electricity every minute of every day. MISO is committed to reliable, nondiscriminatory operation of the bulk power transmission system and collaborating with all stakeholders to create cost-effective and innovative solutions for our changing industry. MISO operates one of the world’s largest energy markets with more than $40 billion in annual gross market energy transactions.