Microsoft Corporation - Mke 3B Data Center
4800 90TH ST · MOUNT PLEASANT, Richland County, WI
Source: Primary source
Microsoft Corporation - Mke 3B Data Center is a mapped data center in Richland County, WI. DataCentersExposed has documented 1 tracked EPA enforcement record at this site.
Reporting by Eric Keller · Updated Jun 12, 2026
Most sites are mapped — located but awaiting a second source. How we verify
Dot size = disclosed capacity (MW). Smallest = undisclosed, not small.
Overview
source: linkNo description yet.
The grid behind this site, right now
source: MISO · gridstatus- Wind21.6%
- Natural Gas21.4%
- Coal20.5%
- Solar18.4%
- Nuclear14.1%
- Imports2.2%
- Other1.8%
Real-time generation mix for the MISO grid this site draws from, as of Jun 16, 2026, 4:35 PM. ISO-wide, not this facility's own metering. Source: gridstatus.
In the news
source: Google News- Dane County joins growing number of communities with data center moratoriumsWisPolitics· Jun 9, 2026
- UN calculates nation-sized environmental footprints for AI and data centersWISN· Jun 3, 2026
- How sustainable are Vancouver's AI data centres going to be?Vancouver Sun· May 29, 2026
- Microsoft doesn’t expect its data centers will trigger review under Great Lakes CompactWPR· May 27, 2026
- See drone views of Wisconsin's massive data centers under constructionMilwaukee Journal Sentinel· May 26, 2026
- Got Questions About AI Data Centres in Vancouver? Here Are AnswersThe Tyee· May 25, 2026
Tax breaks & subsidies
source: Good Jobs First / GASB 77No per-deal tax break is linked to this site yet. No state discloses the recipient of a data-center abatement at the facility level, so per-site deals are rare in the public record. If you have a development agreement or board resolution for this site, send it to us.
Wisconsin reported $40M in Qualified Data Centers sales/use tax exemption (Wis. Stat. § 77.54(70)) for FY2024 (Wisconsin Department of Revenue). Program-wide, not attributable to this site.
Water use
No measured record exists, so this is a low-confidence model from 75 MW (interconnection capacity): 1.2 L/kWh cooling (cool climate) + 0.55 gal/kWh embedded in MISO grid mix. How we estimate. Have a utility document? Send it and we'll replace this with the real figure.
EPA permits & violations
source: EPA ECHO- Clean Air Actno penaltyformal · reported 2025-07-31
Environmental permits
source: Permit register- Clean Air Act permitted sourceWI0000005510130249NAICS 518210; ECHO compliance status: Violation w/in 1 Year
Air quality near this site
source: AirNowAir Quality Index from the nearest AirNow reporting area (Kenosha-Racine Lakeside), as of 2026-06-10. Regional context — not this facility's own emissions.
Who lives nearby
source: Census ACS 2023Demographics of the census tract this facility sits in (American Community Survey 5-year estimates). Environmental-justice context for who bears the local impacts.
Nearest school
source: HIFLD / NCESThe nearest public school, Schulte Elementary in Sturtevant, is 1.2 mi from this site (313 students).
Schools are sensitive receptors for the noise, backup-generator exhaust, and traffic a large data center brings. Straight-line distance to the nearest public school (HIFLD/NCES, US public schools only).
Hearings timeline
No public-hearing records linked to this site yet. We surface planning-commission and board-of-supervisors dates when a record names a facility. If you know of a hearing on this site, tell us.