Datacenter Sites in Day County, South Dakota
Day County has 82 scored datacenter candidate sites averaging 51.9/100 DC Readiness, with a catalogued aggregate of 1,102 MW. FEMA rates local natural-hazard risk as "Relatively Low". The county has a datacenter tax incentive on record.
At a glance
Day County, South Dakota has 82 scored datacenter candidate sites averaging 51.9/100 DC Readiness, roughly in line with the South Dakota average of 54.7. It ranks 2nd of 52 South Dakota counties by number of sites and 46th by average score. The top-scoring site is Substation-Adjacent site · cb7d570c at 57.9/100.
Site-selection context for Day County
Incentive detail: No state corporate income tax; no personal income tax; no personal property tax.
How does Day County compare with other counties in South Dakota?
By number of scored sites, Day County ranks 2nd of the 52 South Dakota counties with a county page, holding 7.1% of the state's 1,151 sites. Its average DC Readiness of 51.9/100 ranks 46th in the state and is roughly in line with the national average of 53.0. Nationally it has the 422nd-largest site inventory of 2,964 counties with five or more sites. 0 sites score 70 or higher and 14 score 55 or higher.
What types of datacenter sites are in Day County?
Industrial sites are the most common (58, 71% of the county's inventory), followed by greenfield (14) and substation-adjacent (9). 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 Day County?
Industrial electricity averages 8.45¢/kWh and commercial 7.96¢/kWh. FEMA's National Risk Index rates the county "Relatively Low" (22). WRI water stress is low-medium. 3 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 $3,549 an acre.
By site type
Top datacenter sites in Day County
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| UNKNOWN159679 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 57.9 |
| TAP159616 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 57.9 |
| EC Near Webster IC | Greenfield | — | — | 4.3 yrs | 57.8 |
| UNKNOWN131133 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 57.7 |
| TAP159543 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 57.6 |
| TAP159554 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 57.5 |
| TAP143513 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 57.4 |
| EC Near Webster IC | Greenfield | — | — | 4.3 yrs | 57.2 |
| UNKNOWN143495 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 57.1 |
| TAP159546 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 57.1 |
| EC Near Webster IC | Greenfield | — | — | 4.3 yrs | 56.8 |
| UNKNOWN131132 | Substation-Adjacent | 115 kV | 100 MW | 4.3 yrs | 56.4 |
| EC Near Webster IC | Greenfield | — | — | 4.3 yrs | 56.2 |
| EC Near Webster IC | Greenfield | — | — | 4.3 yrs | 55.9 |
| EC Near Webster IC | Greenfield | — | — | 4.3 yrs | 52.8 |
| EC Near Webster IC | Greenfield | — | — | 4.3 yrs | 52.5 |
| EC Near Webster IC | Greenfield | — | — | 4.3 yrs | 51.6 |
| EC Near Webster IC | Greenfield | — | — | 4.3 yrs | 51.4 |
| 180 South Spruce Street | Industrial | — | — | 4.3 yrs | 51.2 |
| 259 West Yellowstone Trail | Industrial | — | — | 4.3 yrs | 51.2 |
| 203 North 2nd Street | Industrial | — | — | 4.3 yrs | 51.2 |
| 177 South Spruce Street | Industrial | — | — | 4.3 yrs | 51.2 |
| 44286 US HWY 12 | Industrial | — | — | 4.3 yrs | 51.2 |
| 374 East Yellowstone Trail | Industrial | — | — | 4.3 yrs | 51.2 |
| 22 West Yellowstone Trail | Industrial | — | — | 4.3 yrs | 51.2 |
Every scored site in Day County
All 82 sites, best first.
- Substation-Adjacent site · cb7d570c · 57.9
- Substation-Adjacent site · 0309b696 · 57.9
- EC Near Webster IC · b55bf292 · 57.8
- Substation-Adjacent site · 780ca4e3 · 57.7
- Substation-Adjacent site · 56c6cc25 · 57.6
- Substation-Adjacent site · 46f31ef4 · 57.5
- Substation-Adjacent site · 40131693 · 57.4
- EC Near Webster IC · 87d6abd6 · 57.2
- Substation-Adjacent site · 2e443ae1 · 57.1
- Substation-Adjacent site · e29da2fa · 57.1
- EC Near Webster IC · 0aa26ffe · 56.8
- Substation-Adjacent site · 6c394677 · 56.4
- EC Near Webster IC · ad1c4b4a · 56.2
- EC Near Webster IC · ce6e269b · 55.9
- EC Near Webster IC · 610bd5b4 · 52.8
- EC Near Webster IC · 6b07de7d · 52.5
- EC Near Webster IC · df298156 · 51.6
- EC Near Webster IC · a3bfd38e · 51.4
- 176 South Spruce Street · 51.2
- 178 South Spruce Street · 51.2
- 22 West Yellowstone Trail · 51.2
- 135 South Main Street · 51.2
- 359 Yellowstone Trail · 51.2
- 177 South Spruce Street · 51.2
- 259 West Yellowstone Trail · 51.2
- 130 South Main Street · 51.2
- 175 South Spruce Street · 51.2
- 139 South Main Street · 51.2
- 203 North 2nd Street · 51.2
- 180 South Spruce Street · 51.2
- 70 West Yellowstone Trail · 51.2
- 44286 US HWY 12 · 51.2
- 140 South Main Street · 51.2
- 374 East Yellowstone Trail · 51.2
- 214 West 3rd Avenue · 51.2
- 170 South Oak Street · 51.2
- 165 South Oak Street · 51.2
- 169 South Oak Street · 51.2
- 209 South 2nd Street · 51.2
- 171 South Oak Street · 51.2
- 173 South Spruce Street · 51.2
- 44600 142nd Street · 51.1
- 316 North 3rd Street · 51.1
- 512 East Lakeshore Drive · 51.1
- 22 East Lakeshore Drive · 51.1
- 936 East Lakeshore Drive · 51.1
- 218 West Lakeshore Drive · 51.1
- EC Near Webster IC · 732bc4b8 · 51.1
- 12 East Lakeshore Drive · 51.1
- 1218 East Lakeshore Drive · 51.1
- 130 East Lakeshore Drive · 51.1
- 1012 East Lakeshore Drive · 51.1
- Blue Dog Lake Open Dump · 51.0
- EC Near Webster IC · e5d178b5 · 51.0
- Greenfield (TAP159537 - TAP159554) · 50.8
- EC Near Webster IC · 36ab749c · 50.8
- Greenfield (TAP143494 - TAP159546) · 50.8
- 14903 422nd Avenue · 50.7
- Campbell Slough Open Dump · 50.7
- 12554 437th Avenue · 50.6
- 44017 147th Street · 50.5
- 14087 444th Avenue · 50.4
- 14873 442nd Avenue · 50.3
- 167 South Oak Street · 50.3
- 172 South Oak Street · 50.3
- 166 South Oak Street · 50.3
- 321 South 2nd Street · 50.3
- 76 West Lakeshore Drive · 50.3
- 179 South Spruce Street · 50.3
- 174 South Spruce Street · 50.3
- 106 West Lakeshore Drive · 50.3
- 60 East Lakeshore Drive · 50.3
- 131 South Main Street · 50.3
- 219 North 2nd Street · 50.3
- 47 West Yellowstone Trail · 50.3
- 220 West Yellowstone Trail · 50.3
- 225 West 4th Avenue · 50.3
- 168 South Oak Street · 50.3
- 954 East Lakeshore Drive · 50.2
- 206 West Lakeshore Drive · 50.2
- 130 West Lakeshore Drive · 49.4
- Webster IC · 48.7
Day County datacenter FAQ
How many datacenter sites are in Day County?
82 scored datacenter candidate sites, averaging 51.9/100 DC Readiness. That is the 2nd-most of 52 South Dakota counties with five or more sites.
What is the highest-scoring datacenter site in Day County?
Substation-Adjacent site · cb7d570c scores 57.9/100 DC Readiness, the highest of the 82 scored sites in Day County (a substation-adjacent site).
Does Day County offer datacenter tax incentives?
No state corporate income tax; no personal income tax; no personal property tax.
What is the natural-hazard risk in Day County?
FEMA's National Risk Index rates Day County as "Relatively Low" (score 22).
What are industrial electricity rates in Day County?
Average industrial electricity is 8.45¢/kWh and commercial is 7.96¢/kWh in Day County.
More in South Dakota
- All datacenter sites in South Dakota· 1,151 sites
- Operating datacenters in South Dakota
- Electric substations in South Dakota
- Minnehaha County· 95 sites · avg 58.1
- Pennington County· 58 sites · avg 59.7
- Beadle County· 51 sites · avg 55.1
- Charles Mix County· 40 sites · avg 53.4
- Brown County· 37 sites · avg 57.4
- Brookings County· 35 sites · avg 55.3
- Industrial sites in South Dakota
- Greenfield sites in South Dakota
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 Day County, South Dakota”, https://gridcensus.com/datacenter-sites/south-dakota/day-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 Day County, South Dakota 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.