St. Louis data-center zoning: Board Bill 49’s tiered buffers, baseline-noise limits, and “Public Impact Agreement” explained (committee vote set for July 7)
St. Louis’ Housing, Urban Development and Zoning Committee is scheduled to hear Board Bill 49 on July 7. The committee-amended text would create a new zoning chapter for data centers—splitting them into micro, standard, and major categories and adding distance buffers, baseline-noise rules, and extra disclosures, including a “Public Impact Agreement” requirement for major projects.
St. Louis MO – Board Bill 49, the proposal that would create new data-center zoning rules, is scheduled for action in the Board of Aldermen’s Housing, Urban Development and Zoning (HUDZ) committee meeting on July 7, 2026 from 11:00 a.m. to 1:00 p.m. at City Hall, Kennedy Room 208, with a virtual option. Public comment will be taken on the designated board bills and topics at the meeting.
Important: this is a committee-stage step. Even if the committee advances the bill, Board Bill 49 would still need further Board of Aldermen action and mayoral signing before it becomes law.
What Board Bill 49 would do (Section 26.77)
Board Bill 49 would amend the City’s zoning code to add a dedicated new chapter—Section 26.77 (Data Centers)—with definitions, a use table by data-center size, siting standards, and application requirements. The bill was introduced June 18, 2026 and the Planning Commission approved it on June 10, 2026.
What “as amended in committee” adds: monitoring and accountability
The committee-amended text frames data centers as a specialized land use with potential impacts on nearby residents and infrastructure—particularly through energy demand, water use, noise, heat, and other environmental and safety concerns. In the amended language, the zoning chapter is structured around verified reporting requirements, including:
- verified energy consumption
- water usage
- e-waste generation
- air emissions
- noise emissions
- generator use
- heat impact reporting
- hazardous materials management reporting
How the rules classify projects: micro, standard, and major
The proposal would define three tiers using gross square footage and maximum power demand:
- Micro: less than 10,000 gross square feet and less than 5 MW
- Standard: more than 10,000 and less than 250,000 gross square feet; and more than 5 MW but less than 30 MW
- Major: more than 250,000 and less than 500,000 gross square feet; or 30 MW or more
Neighbor buffers and noise limits tied to baseline measurements
The amended chapter includes setbacks intended to keep data-center buildings, backup generators, and other noise- or light-emitting infrastructure away from sensitive parcels—listed in the text as including certain residential zone parcels, transit-centered parcels, and parcels containing a school or public park. The setbacks named in the committee-amended version include:
- 150 feet for micro data centers
- 300 feet for standard data centers
For noise, the proposal uses a baseline noise level concept: a measure of noise taken at the property line before an application, establishing dBA/dBC values averaged over a 60-minute period. Under the committee-amended language, operational noise limits are expressed as a small increment above the baseline (with the text describing thresholds relative to baseline levels as measured from the property line).
Application disclosures residents should look for
Board Bill 49 would require applications to include project classification and multiple details about how the facility would be built and run. For standard and major data centers, the committee-amended text calls for disclosures such as:
- anticipated end users and purpose
- maps showing needed substations/substation upgrades and new power lines
- backup generator details (number, size, fuel source, and anticipated testing schedule)
- flood risk assessment and planned mitigation
- anticipated annual water use plus PUE and WUE figures (peak and average annual)
- facility design elements intended to be compatible with adjacent properties
For major data centers: the Public Impact Agreement mechanism
For Major Data Centers seeking approval through the conditional-use track, the committee-amended text sets up a Public Impact Agreement framework. The language describes this as a binding contract entered into with the City as an additional condition tied to conditional-use approval, intended to address site-specific impacts. It also states that if an event constituting a default occurs, the conditional-use permit could be revoked under the procedures referenced in the chapter. The Public Impact Agreement contents are intended to be shaped by the site-specific context and anticipated effects on adjacent parcels and public infrastructure.
What residents can do before July 7
If you live or operate near industrial corridors or other areas that could see data-center redevelopment, the July 7 HUDZ committee meeting is the point where the zoning language can still be debated and potentially revised. Residents and business owners who want to weigh in can use the public-comment process at the meeting, and can also review the committee-amended bill text to understand the exact tier definitions, buffer language, baseline noise approach, reporting requirements, and the Public Impact Agreement framework.
Sources
Discover more from Interactive News
Subscribe to get the latest posts sent to your email.
