Calvert County data-center text amendments adopted May 5, 2026
Calvert County (MD) — Data Center Text Amendments
Calvert County, Maryland · Calvert County, MD data-center text amendments (May 5, 2026)
- Status
- Proposed / pending
- Applies to
- Data-center developers in Calvert County, MD.
- Enforced by
- Calvert County Department of Planning & Zoning
Data center text amendments adopted by Calvert County BOCC. Amendments mandate closed-loop cooling systems, prohibit groundwater use for cooling, require developers to fund infrastructure upgrades, and enforce Tier 4 generator standards. Action taken May 5 after two prior failed motions (by Commissioners Mike Hart and Catherine Grasso) to enact a temporary 24-month moratorium.
Who is protected: Calvert County residents (groundwater, energy infrastructure, public health from generators).
Legal detail
Calvert County BOCC adopted data-center text amendments requiring compliance through construction start. Triggered by AWS job postings for a data-center build in Lusby; AWS submitted site plan documents April 15, 2026.
Key facts
| Jurisdiction | Calvert County, Maryland |
|---|---|
| Level | County |
| Enacted | May 5, 2026 |
| Citation | Calvert County, MD data-center text amendments (May 5, 2026) |
| Penalties | Permit denial or conditional approval contingent on compliance. |
| Topics | data-center siting and energy · government use of AI |
| Agency page | Calvert County, MD — Data Centers (official page) |
Related data-center siting and energy rules elsewhere
- Superior WI Data Center Moratorium (1-year) · In effect
- Dane County WI Hyperscale Data Center Moratorium · In effect
- Madison WI Data Center Moratorium (1-year) · In effect
- Manitowoc County WI Data Center Moratorium · In effect
- WA SB 5982 (Data Center / Clean Energy) · In effect
- Dayton OH data center moratorium (180-day, Apr 2026) · In effect
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