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Datacenter Sites in St. Clair County, Michigan

St. Clair County has 123 scored datacenter candidate sites averaging 54.3/100 DC Readiness, with a catalogued aggregate of 5,501 MW. FEMA rates local natural-hazard risk as "Relatively Moderate". The county has a datacenter tax incentive on record.

At a glance

St. Clair County, Michigan has 123 scored datacenter candidate sites averaging 54.3/100 DC Readiness, roughly in line with the Michigan average of 55.3. It ranks 11th of 81 Michigan counties by number of sites and 45th by average score. The top-scoring site is ST. CLAIR at 68.6/100.

123
Candidate sites
54.3/100
Avg DC Readiness
5,501 MW
Catalogued capacity
theoretical aggregate
Relatively Moderate
Hazard rating
◆ Loading map…
≥ 7560–7540–60≤ 40
Top 25 in St. Clair County

Site-selection context for St. Clair County

Yesproperty_tax_exemption
Datacenter tax incentive
8.81¢/kWh
Commercial electricity
4.74¢/kWh
Industrial electricity
12
Fiber providers
Low
Water stress
$5,814
Land price / acre
700
Cooling degree days
6,600
Heating degree days
45°F
Mean annual temp

Incentive detail: Personal property tax exemption for eligible DC equipment; MEGA tax credits.

How does St. Clair County compare with other counties in Michigan?

By number of scored sites, St. Clair County ranks 11th of the 81 Michigan counties with a county page, holding 2.4% of the state's 5,157 sites. Its average DC Readiness of 54.3/100 ranks 45th in the state and is roughly in line with the national average of 53.0. Nationally it has the 246th-largest site inventory of 2,964 counties with five or more sites. 0 sites score 70 or higher and 41 score 55 or higher.

What types of datacenter sites are in St. Clair County?

Industrial sites are the most common (70, 57% of the county's inventory), followed by greenfield (27) and substation-adjacent (17). Site type reflects how the parcel was identified — next to a substation, on a former mine or brownfield, on industrial or federal excess land — and is scored on the same 14 factors either way.

What are power cost, hazard, water and fiber conditions in St. Clair County?

Industrial electricity averages 4.74¢/kWh and commercial 8.81¢/kWh. FEMA's National Risk Index rates the county "Relatively Moderate" (25). WRI water stress is low. 12 fiber providers report service in the county. The climate runs 700 cooling degree days a year with a mean temperature of 45°F. Land is valued around $5,814 an acre.

By site type

Top datacenter sites in St. Clair County

Top datacenter sites in St. Clair County
SiteTypeVoltageCapacityQueue waitScore
ST. CLAIRSubstation-Adjacent345 kV600 MW2.2 yrs68.6
UNKNOWN128518Substation-Adjacent345 kV600 MW2.2 yrs65.0
TAP139992Substation-Adjacent345 kV600 MW2.2 yrs64.9
FITZSubstation-Adjacent345 kV600 MW2.2 yrs64.7
GREENWOODSubstation-Adjacent345 kV600 MW2.2 yrs64.2
EC Coal St. Clair CountyGreenfield——2.2 yrs60.6
OZ St. ClairGreenfield——2.2 yrs60.3
EC Coal St. Clair CountyGreenfield——2.2 yrs59.9
EC Near MarysvilleGreenfield——2.2 yrs59.8
UNKNOWN128475Substation-Adjacent138 kV100 MW2.2 yrs59.5
EC Near St ClairGreenfield——2.2 yrs59.4
Greenfield (FITZ - THETFORD)Greenfield345 kV600 MW2.2 yrs59.0
UNKNOWN131004Substation-Adjacent120 kV100 MW2.2 yrs58.8
TAP146115Substation-Adjacent120 kV100 MW2.2 yrs58.8
UNKNOWN131007Substation-Adjacent120 kV100 MW2.2 yrs58.8
Greenfield (UNKNOWN128507 - FITZ)Greenfield345 kV600 MW2.2 yrs58.7
TAP139976Substation-Adjacent120 kV100 MW2.2 yrs58.7
UNKNOWN128476Substation-Adjacent138 kV100 MW2.2 yrs58.3
UNKNOWN158225Substation-Adjacent120 kV100 MW2.2 yrs58.0
TAP139991Substation-Adjacent120 kV100 MW2.2 yrs57.9
TAP146114Substation-Adjacent120 kV100 MW2.2 yrs57.9
TAP139997Substation-Adjacent120 kV100 MW2.2 yrs57.6
EC Near St ClairGreenfield——2.2 yrs57.6
EC Near MarysvilleGreenfield——2.2 yrs57.6
EC Near Cargill SaltGreenfield——2.2 yrs57.6

Every scored site in St. Clair County

All 123 sites, best first.

St. Clair County datacenter FAQ

How many datacenter sites are in St. Clair County?

123 scored datacenter candidate sites, averaging 54.3/100 DC Readiness. That is the 11th-most of 81 Michigan counties with five or more sites.

What is the highest-scoring datacenter site in St. Clair County?

ST. CLAIR scores 68.6/100 DC Readiness, the highest of the 123 scored sites in St. Clair County (a substation-adjacent site).

Does St. Clair County offer datacenter tax incentives?

Personal property tax exemption for eligible DC equipment; MEGA tax credits.

What is the natural-hazard risk in St. Clair County?

FEMA's National Risk Index rates St. Clair County as "Relatively Moderate" (score 25).

What are industrial electricity rates in St. Clair County?

Average industrial electricity is 4.74¢/kWh and commercial is 8.81¢/kWh in St. Clair County.

More in Michigan

About this data

Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published November 12, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.

Cite as: GridCensus, “Datacenter candidate sites in St. Clair County, Michigan”, https://gridcensus.com/datacenter-sites/michigan/st-clair-county (data as of November 12, 2026).

Dataset updated . Screening estimates derived from public data sources.

Go deeper than the public screen

Every site and score for St. Clair County, Michigan is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.

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