Where is REG Mason City Solar?

In Cerro Gordo County, Iowa (IA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.

How big is REG Mason City Solar?

3 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.

Who owns REG Mason City Solar?

EIA-860M names REG Mason City, LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.

Is this the same as REG Mason City Solar LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — REG Mason City, LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "REG Mason City Solar LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is REG Mason City Solar still running?

EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.

REG Mason City Solar

REG Mason City Solar is a 3 MW solar farm in Cerro Gordo County, Iowa, operated by REG Mason City, LLC. EIA-860M lists 1 generating unit here, inside MISO. Its unit entered service in 2024.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Nameplate capacity: 2.6 MW; 2.6 MW net summer
Generating units: 1
In service: 2024
EIA plant ID: 69243

Where it is

Loading map…

County: Cerro Gordo County, Iowa
Coordinates: 43.1362, -93.2639
Balancing authority: MISO
Sector: Industrial Non-CHP

Units, technology and status

Operator of record: REG Mason City, LLC
Primary energy source: Solar
Technologies: Solar Photovoltaic
Status: Operating

Every plant REG Mason City, LLC reports to EIA →

REG Mason City Solar: FAQ

Where is REG Mason City Solar?: In Cerro Gordo County, Iowa (IA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
How big is REG Mason City Solar?: 3 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
Who owns REG Mason City Solar?: EIA-860M names REG Mason City, LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
Is this the same as REG Mason City Solar LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — REG Mason City, LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "REG Mason City Solar LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is REG Mason City Solar still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.