Mississippi Public Service Commission

Address

501 North West Street, Woolfolk State Office Bldg., Jackson, MS 39201-1174

Phone

(601) 961-5461Fax (601) 961-5842

Website

psc.ms.gov ↗

Utility landscape

• Entergy Mississippi, LLC IOU

  Central and northern Mississippi, including Jackson metro and surrounding rural areas

  Subject to formula rate plan (FRP) mechanism reviewed annually by MPSC; recent proceedings have addressed storm cost recovery and investment in generation modernization following Entergy Arkansas affiliate precedents.

• Mississippi Power Company (Southern Company subsidiary) IOU

  Southern Mississippi, including Gulf Coast and Pine Belt regions

  Ongoing regulatory scrutiny following Kemper IGCC plant write-downs; company has pivoted toward natural gas and solar resources, with MPSC closely monitoring rate base justification under its integrated resource planning cycle.

• Cooperative Energy (Mississippi Delta Energy Agency) coop

  Statewide wholesale power supplier serving 11 distribution electric cooperatives across Mississippi

  Pursuing diversification of generation portfolio away from coal; FERC-jurisdictional wholesale agreements intersect with MPSC oversight of member distribution cooperatives on retail rate pass-through issues.

• Singing River Electric Power Association coop

  Jackson and George counties in southeastern Mississippi near Gulf Coast

  Active in discussions around grid resilience investments following hurricane exposure; evaluating distributed energy resource integration programs for residential members.

• City of Yazoo City Municipal Electric System muni

  Yazoo City and immediate surrounding area in west-central Mississippi

  Operates under municipal authority with limited MPSC oversight; aging infrastructure replacement costs have pressured rates, prompting evaluation of TVA or cooperative power supply alternatives.

• Starkville Electric Department muni

  Starkville and portions of Oktibbeha County in northeastern Mississippi

  TVA-supplied municipal utility navigating load growth driven by Mississippi State University expansion; monitoring TVA's regional transmission and rate changes that flow through to municipal customers.

Key issues

• Entergy Mississippi FRP annual review cycle: MPSC staff scrutinizing 2025 test-year filing for prudency of capital expenditures related to transmission hardening and grid automation, with disputes over allowable ROE in a shifting interest rate environment.
• Mississippi Power integrated resource plan (IRP) update: Company filed a revised IRP reflecting retirement of remaining coal capacity and accelerated solar procurement; MPSC evaluating whether proposed utility-scale solar additions and associated PPAs meet least-cost standard under Miss. Code Ann. § 77-3-1 et seq.
• Broadband pole attachment and infrastructure access: MPSC and electric utilities navigating an influx of federal BEAD program-funded broadband deployment requests, creating contested proceedings over make-ready costs, attachment rates, and timeline obligations for rural electric cooperatives.
• Storm cost recovery and securitization: Post-hurricane and severe weather cost recovery petitions by both Entergy Mississippi and Mississippi Power remain active, with legislative interest in authorizing utility securitization financing as an alternative to traditional deferred cost amortization in rates.
• Electric vehicle infrastructure tariff development: MPSC opened a proceeding to consider EV charging tariff structures and cost allocation for utility-owned charging infrastructure, with stakeholder comments addressing whether ratepayer-funded EV investment meets public interest thresholds under state law.

Upcoming

• 2026-09-15

  Entergy Mississippi annual Formula Rate Plan (FRP) settlement conference or evidentiary hearing (estimated) — MPSC Staff and intervenors expected to present positions on 2025 test-year revenue requirement and proposed rate adjustments.

• 2026-10-01

  Mississippi Power IRP proceeding: estimated deadline for intervenor rebuttal testimony and MPSC Staff final report on least-cost determination for proposed solar additions and coal plant retirement schedule.

• 2026-11-18

  MPSC open meeting (estimated regular commission meeting cycle) anticipated to include action on pending storm cost recovery dockets for Entergy Mississippi and Mississippi Power, including any securitization authorization requests.

• 2027-01-15

  Deadline (estimated) for utilities subject to MPSC jurisdiction to file EV tariff proposals in response to the commission's rulemaking notice, following close of public comment period in late 2026.