Missouri: Data centers, including accessory uses, require an approved development plan and are allowed only in Planned Business Park or Planned Industrial districts. The rules cover new facilities and expansions that increase building area or utility demand by at least 10%. Applicability and zoning limits

Missouri: Before a public hearing, applicants must submit an environmental and community impact analysis covering site activities, impacts on services and resources, and mitigation; a County-selected environmental engineer must review it, at the applicant’s expense. Impact analysis and review costs

Missouri: Data center sites must connect to public water and sewer, provide specified buffers and landscaping, and meet setbacks from property lines. Principal structures must be at least 200 feet from adjoining non-residential property and 500 feet from residentially developed property; required buffers include 150 feet along street frontage and near specified sensitive uses, and 50 feet next to non-residential uses. Utilities, buffers, and setbacks

Missouri: Building heights are capped at 80 feet in the Urban Growth Area, 70 feet in the Suburban Growth Area, and 50 feet in the Rural Growth Area; development is prohibited in regulated floodplains and floodways. Height limits and floodplain prohibition

Missouri: Data centers must meet detailed site and building design rules, including screening of equipment, restrictions on materials and colors, and limits on fencing; chain-link fencing is prohibited. Design and fencing standards

Missouri: Lighting must meet dark-sky and shielding standards, use LED lighting no warmer than 3,000 K, and keep illumination at residential properties to 0.1 foot-candles or less. Non-security lighting must use motion sensors or adaptive dimming, and annual compliance certification is required. Lighting limits and controls

Missouri: Noise at property lines adjoining residential, institutional, or specified agricultural properties is limited to 55 dBA by day and 50 dBA at night, with separate low-frequency limits; tonal, impulsive, or rhythmic noise counts as 3 dBA louder. Applicants must provide acoustic modeling before a construction permit, and post-occupancy testing, permanent monitoring, and annual certification are required. Noise limits and monitoring

Missouri: Generator use is limited to emergencies and scheduled testing. Testing is restricted to weekdays from 10 a.m. to 4 p.m., excluding holidays, and to 60 minutes per generator per month; generators may not be tested under load. Generator testing restrictions

Missouri: Permit applications must document grid capacity, effects on residential utility customers, and needed upgrades. Operators must participate in available demand-response programs, provide load-shedding plans, and bear reasonable, proportionate costs of required grid improvements. Grid review and upgrade costs

Missouri: Operators must certify that at least 40% of annual energy use comes from renewable sources upon occupancy and annually thereafter, rising to 60% within five years, subject to a limited technical-infeasibility exception and County-approved extension. Generators must meet EPA Tier 4 Final standards, and battery storage must be evaluated first for continuity power. Renewable-energy and backup-power rules

Missouri: Water must come from the public water district, and applicants must disclose cooling technology and maximum demand and verify system capacity. Closed-loop cooling with limited evaporation, or a more water-efficient available technology, is required; once-through cooling is prohibited. Water reuse is required to the maximum practical extent, with monthly consumption reporting for the first three years or until stable operations are verified. Water sourcing, cooling, and reporting

Missouri: Applications must include a wastewater impact assessment prepared by a qualified Missouri engineer. Process wastewater must meet pretreatment standards, specified cooling-tower discharge limits apply, and facilities must install monitoring equipment and submit semiannual discharge reports. Wastewater assessment and monitoring

Missouri: Applicants must submit an air-quality impact assessment. Cooling equipment must use refrigerants with a global-warming potential below 750, and facilities must maintain leak management and submit semiannual air-quality compliance reports. Air-quality and refrigerant requirements

Missouri: Applicants must obtain approval of a stormwater management plan and provide runoff controls, pollutant treatment, spill containment, and fire-water management. BMPs require third-party inspections at least every six months, and annual functionality certifications and ongoing maintenance obligations apply. Stormwater planning and inspections

Missouri: Before operations begin, owners must obtain approval of a decommissioning and site-remediation plan and update it at least every five years. Decommissioning must start within 90 days of closure and generally finish within 12 months; before occupancy, owners must provide financial assurance equal to 100%–125% of the County-approved estimated costs. Closure plan and financial assurance

Missouri: Each new data center and expansion requires a development agreement incorporated into plan approval and binding for the facility’s life or 30 years, whichever is longer. The agreement includes negotiated annual infrastructure-impact payments and an upfront contribution before the first building’s occupancy certificate, plus community investment and workforce commitments. Required development agreement and payments

Missouri: The development agreement requires good-faith efforts to obtain 25% of construction labor hours from County residents, prevailing wages, and a project labor agreement before the first building permit. During operations, at least 50% of full-time positions and labor hours must be performed by County residents. Workforce requirements

Missouri: Developers must fund or build necessary road, intersection, signal, and utility improvements and coordinate with public-safety agencies, including funding needed specialized equipment and training. Infrastructure and public-safety obligations

Missouri: Complaints trigger County investigation, and violations can lead to abatement orders, penalties, and utility disconnection for a prescribed period; civil penalties may reach $1,000 per day when the County pursues authorized court relief. Enforcement and penalties

Pennsylvania: The September 29, 2026 SALDO is a draft approved by the Planning Commission, not yet enacted. If enacted, it would classify data centers as high-impact major land developments, generally requiring preliminary and final plans; plan approval and recording are required before development-related permits may issue. Draft status and applicability

Pennsylvania draft SALDO: Data-center structures and facilities would have to be at least 1,000 feet from an existing residence or other sensitive receptor, at least 250 feet from the site boundary, and at least 200 feet from a perennial watercourse. Data-center location limits

Pennsylvania draft SALDO: High-impact developments would need an impact statement addressing environmental and cultural effects and a combined management and decommissioning plan, including an emergency response plan developed with host-municipality emergency providers and approved by the County Department of Emergency Services. Impact and emergency plans

Pennsylvania draft SALDO: Data-center sound would be limited at the property line to 55 dB(A) from 7 a.m. to 7 p.m. and 45 dB(A) from 7 p.m. to 7 a.m.; applicants must provide technical documentation that the limits will be met. Sound limits

Pennsylvania draft SALDO: Data-center applicants would need an electric-provider certification of adequate grid capacity and no degradation of service to other ratepayers. They must provide a water-use plan and, for nonpublic water sources, a professional feasibility study demonstrating adequate supply and no adverse effects on nearby groundwater or surface water. Electricity and water documentation

Pennsylvania draft SALDO: Data-center applicants would need a professionally prepared thermal-impact mitigation plan addressing off-site heat discharge and heat-island effects. Thermal-impact plan

Pennsylvania draft SALDO: Before final-plan approval, data-center owners would have to provide financial security for decommissioning and land restoration, based on an independent engineer’s cost estimate updated at least every five years. After operations cease, removal and restoration generally must be completed within 18 months; an exception may apply to infrastructure with an ongoing purpose or legally committed adaptive reuse. Decommissioning and financial security

Pennsylvania draft SALDO: High-impact sites would need an access road at least 25 feet wide, a security fence at least six feet high with a self-locking gate, and warning signs describing potential dangers and emergency contacts. Access and security rules

Pennsylvania draft SALDO: Previously filed subdivisions and land developments with building permits lawfully approved and obtained before the ordinance takes effect are exempt from its new requirements. The exemption for pending plans and approved permits.

Pennsylvania draft SALDO: Applicants for major land developments may request combined preliminary and final plan approval, at the Planning Commission’s discretion; the application must include the materials required for both stages. Combined Preliminary and Final Plan.

Pennsylvania draft SALDO: Final plans may be submitted in phases, allowing a major development to proceed by sections. A Final Plan may be submitted in sections or phases.

Pennsylvania draft SALDO: The Planning Commission may waive or modify requirements if literal enforcement would cause a qualifying hardship or an alternative would provide equal or better results; relief cannot be contrary to the ordinance’s purposes or public interest. Modification or waiver criteria.

Pennsylvania draft SALDO: The ordinance provides for an early advisory meeting to exchange information and expedite review, though discussions are advisory and do not bind the County to approve a plan. Advisory meeting purpose.

Pennsylvania draft SALDO: If the County fails to issue and communicate a decision within the prescribed period, the application is deemed approved, unless the applicant agreed in writing to an extension or changed communication procedure. Failure to render decision.

Missouri data-center ordinance: Data centers may be approved through a development plan in the Planned Business Park or Planned Industrial districts. This creates an approval route, but limits eligible locations to those districts. Permitted districts and plan approval.

Missouri data-center ordinance: The article applies to new facilities and expansions of at least 10% in building area or utility demand; expansions below that threshold are not covered by these article-specific standards. Applicability threshold for major expansions.

Missouri data-center ordinance: The Director may reduce the 500-foot principal-structure setback adjoining residentially developed property when unique topography or other natural conditions mitigate the setback requirement. Potential setback reduction.

Missouri data-center ordinance: Noise limits may be 5 dB higher where adjoining property is used or zoned for non-residential purposes and is not residential, institutional, or agricultural with a dwelling. Higher limits for specified non-residential neighbors.

Missouri data-center ordinance: The 60% renewable-energy target within five years may be extended if the applicant documents technical infeasibility and the County approves an extension based on supported extenuating circumstances; financial considerations do not qualify. Renewable-energy extension conditions.

Missouri data-center ordinance: At closure, an owner may propose an alternate decommissioning plan that transfers ownership to the County, removes items the County considers unsuitable for reuse, and provides acceptable escrow for remaining mitigation and removal. Alternate closure plan.