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Datacenter Sites in St. Tammany County, Louisiana

St. Tammany County has 31 scored datacenter candidate sites averaging 53.4/100 DC Readiness, with a catalogued aggregate of 3,600 MW. FEMA rates local natural-hazard risk as "Very High". The county has a datacenter tax incentive on record.

At a glance

St. Tammany County, Louisiana has 31 scored datacenter candidate sites averaging 53.4/100 DC Readiness, roughly in line with the Louisiana average of 53.1. It ranks 13th of 59 Louisiana counties by number of sites and 20th by average score. The top-scoring site is Substation-Adjacent site · 0d845fc0 at 64.1/100.

31
Candidate sites
53.4/100
Avg DC Readiness
3,600 MW
Catalogued capacity
theoretical aggregate
Very High
Hazard rating
◆ Loading map…
≥ 7560–7540–60≤ 40
Top 25 in St. Tammany County

Site-selection context for St. Tammany County

Yessales_tax_exemption
Datacenter tax incentive
11.13¢/kWh
Commercial electricity
10.55¢/kWh
Industrial electricity
13
Fiber providers
Low
Water stress
$10,879
Land price / acre
2,700
Cooling degree days
1,700
Heating degree days
67°F
Mean annual temp

Incentive detail: Industrial Tax Exemption Program (ITEP) up to 80% property tax abatement for 10 years.

How does St. Tammany County compare with other counties in Louisiana?

By number of scored sites, St. Tammany County ranks 13th of the 59 Louisiana counties with a county page, holding 1.8% of the state's 1,762 sites. Its average DC Readiness of 53.4/100 ranks 20th in the state and is roughly in line with the national average of 53.2. Nationally it has the 1237th-largest site inventory of 2,964 counties with five or more sites. 0 sites score 70 or higher and 7 score 55 or higher.

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

Former Mine sites are the most common (15, 48% of the county's inventory), followed by greenfield (10) and substation-adjacent (3). 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. Tammany County?

Industrial electricity averages 10.55¢/kWh and commercial 11.13¢/kWh. FEMA's National Risk Index rates the county "Very High" (58). WRI water stress is low. 13 fiber providers report service in the county. The climate runs 2,700 cooling degree days a year with a mean temperature of 67°F. Land is valued around $10,879 an acre.

By site type

Top datacenter sites in St. Tammany County

Top datacenter sites in St. Tammany County
SiteTypeVoltageCapacityQueue waitScore
UNKNOWN112547Substation-Adjacent230 kV300 MW4.3 yrs64.1
UNKNOWN112544Substation-Adjacent230 kV300 MW4.3 yrs63.5
UNKNOWN112536Substation-Adjacent230 kV300 MW4.3 yrs59.6
Greenfield (UNKNOWN112540 - NORTH SLIDELL)Greenfield230 kV300 MW4.3 yrs56.3
Greenfield (UNKNOWN112449 - NORTH SLIDELL)Greenfield230 kV300 MW4.3 yrs56.1
Greenfield (UNKNOWN112540 - NORTH SLIDELL)Greenfield230 kV300 MW4.3 yrs55.7
Greenfield (UNKNOWN112449 - NORTH SLIDELL)Greenfield230 kV300 MW4.3 yrs55.2
Greenfield (UNKNOWN112538 - UNKNOWN112540)Greenfield230 kV300 MW4.3 yrs54.4
EC FFE St. Tammany ParishGreenfield——4.3 yrs54.2
Greenfield (UNKNOWN112537 - UNKNOWN112538)Greenfield230 kV300 MW4.3 yrs54.0
Slidell Public YardIndustrial——4.3 yrs53.9
Greenfield (UNKNOWN112444 - UNKNOWN114199)Greenfield230 kV300 MW4.3 yrs53.9
Mine SiteFormer Mine——4.3 yrs53.7
Greenfield (UNKNOWN112444 - UNKNOWN112537)Greenfield230 kV300 MW4.3 yrs53.3
Greenfield (UNKNOWN114199 - BOGALUSA)Greenfield230 kV300 MW4.3 yrs53.0
Mine SiteFormer Mine——4.3 yrs52.8
Old Concrete PlantIndustrial——4.3 yrs52.7
Mine SiteFormer Mine——4.3 yrs52.7
Mine SiteFormer Mine——4.3 yrs52.7
Mine SiteFormer Mine——4.3 yrs52.2
Mine SiteFormer Mine——4.3 yrs52.2
Mine SiteFormer Mine——4.3 yrs52.2
Mine SiteFormer Mine——4.3 yrs52.2
Mine SiteFormer Mine——4.3 yrs52.1
Mine SiteFormer Mine——4.3 yrs51.2

Every scored site in St. Tammany County

All 31 sites, best first.

St. Tammany County datacenter FAQ

How many datacenter sites are in St. Tammany County?

31 scored datacenter candidate sites, averaging 53.4/100 DC Readiness. That is the 13th-most of 59 Louisiana counties with five or more sites.

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

Substation-Adjacent site · 0d845fc0 scores 64.1/100 DC Readiness, the highest of the 31 scored sites in St. Tammany County (a substation-adjacent site).

Does St. Tammany County offer datacenter tax incentives?

Industrial Tax Exemption Program (ITEP) up to 80% property tax abatement for 10 years.

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

FEMA's National Risk Index rates St. Tammany County as "Very High" (score 58).

What are industrial electricity rates in St. Tammany County?

Average industrial electricity is 10.55¢/kWh and commercial is 11.13¢/kWh in St. Tammany County.

More in Louisiana

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 October 10, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.

Cite as: GridCensus, “Datacenter candidate sites in St. Tammany County, Louisiana”, https://gridcensus.com/datacenter-sites/louisiana/st-tammany-county (data as of October 10, 2026).

Dataset updated . Screening estimates derived from public data sources.

Go deeper than the public screen

Every site and score for St. Tammany County, Louisiana 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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