SB4206 would give Illinois counties and municipalities express authority to regulate the siting and construction of data centers through local ordinance. The bill defines “data center” broadly as a facility primarily used for storing, managing, and processing digital data, including the servers, network equipment, environmental controls, fire protection, and security systems associated with such facilities.
Under the bill, counties could set standards for data center construction, including building size, height, design, and the number of facilities allowed in a geographic area. Counties could also regulate data centers in unincorporated areas and in the 1.5-mile extraterritorial zoning area around municipalities, but could not approve a data center within 3 miles of another municipality’s corporate limits without that municipality’s written consent. Municipalities would receive similar authority within their zoning jurisdiction and surrounding 1.5-mile area. Both counties and municipalities could adopt standards aimed at protecting water resources and reducing noise pollution, and both would have to hold at least one public hearing with newspaper notice before a siting decision.
The bill would add new sections to the Counties Code and the Illinois Municipal Code, creating explicit local zoning and siting authority over data centers. It would affect county boards, municipal corporate authorities, developers, and operators of data centers by allowing local governments to impose design, density, water-use, conservation, contamination-prevention, and noise-mitigation requirements. Existing county zoning provisions on data centers that were already in effect before the bill’s effective date could remain in place, preserving prior local regulations.
Based on the bill text and the absence of recorded committee debate or votes in the provided materials, the overall sentiment appears neutral and regulatory rather than controversial on its face. The measure is framed as a local control and land-use bill, suggesting an intent to give counties and municipalities tools to manage the rapid growth of data centers and their infrastructure impacts. No formal vote history or transcript comments are available to show organized support or opposition.
The main points of potential contention are likely to be the scope of local control, the 3-mile consent requirement near municipal boundaries, and the ability of local governments to impose water and noise restrictions. Data center developers may view the bill as increasing permitting uncertainty and compliance costs, while municipalities and counties may support it as a way to protect land use, water supplies, and neighboring communities. Another possible issue is the bill’s broad definition of data center and the preservation of existing ordinances, which could create uneven regulation across jurisdictions.