Gas Utilities Directory — utility profile
SEMCO Energy Gas Company
Michigan · Investor-Owned · Major Regulated
Utility overview
- Utility name
- SEMCO Energy Gas Company
- Legal name
- SEMCO Energy Gas Company
- Ownership type
- Investor-Owned
- Utility class
- Major Regulated
- Rate jurisdiction
- Michigan Public Service Commission
- State directory
- Michigan utilities
- Customer classes
- Commercial, Residential
Official website and contact
- Official website
- www.semcoenergygas.com
- Customer service phone
- 800-624-2019
- Not published
Contact details are shown only where the utility publishes them.
Published state services
Michigan
Approximately 25 Michigan counties; ~330,000 customers (company customer booklet).
Customer classes: Commercial, Residential
Last confirmed: August 25, 2026
State customer informationVerification sources
- Customer Booklet
SEMCO Energy Gas Company · Regulatory Filing — MPSC-regulated utility; residential and commercial customer classes (accessed 2026-08-25)
- MPSC No. 1 Rate Book
SEMCO Energy Gas Company · Tariff — Residential Service Rate; General Service (GS) Rate (accessed 2026-08-25)
- SEMCO Energy Gas Company MPSC Approved Rate Books
MPSC · State Regulator Inventory — Names SEMCO Energy Gas Company; MPSC-approved natural gas rate book (accessed 2026-08-25)