St. Louis committee advances data-center zoning with renewable-energy and noise safeguards

A St. Louis committee advanced zoning rules for data centers on July 7, adopting a set of amendments that add phased renewable-energy thresholds, third‑party noise measurement requirements and annual reporting for developers. The Housing, Urban Development and Zoning Committee voted to give Board Bill 49 a "do pass" recommendation to the Board of Aldermen.

The bill, as amended, treats data centers as a conditional land use with tiered rules by size. Alderman Anne Schweitzer, the bill sponsor, said the measure distinguishes micro, standard and major facilities and requires projects to demonstrate how they will meet renewable-energy benchmarks and other site-specific conditions. "The city cannot regulate Ameren," Schweitzer said, underscoring that the local rules focus on zoning and the city’s sustainability goals rather than utility operations.

Supporters said the thresholds are feasible and necessary guardrails. "The requirements as they're laid out in this bill are absolutely achievable," said Elise Schafer of the Missouri Coalition for the Environment, citing typical timelines for utility‑scale solar and data‑center construction. Miriam Keller of the City Planning and Urban Design Agency told the committee the amendments address technical concerns and that planning staff will review the revised text at its meeting the following day.

Opponents and some community advocates said the bill does not solve broader workforce and equity concerns. Adolphus Pruitt, president of the local NAACP, said the proposal "is not ready" and does not include training or guaranteed local hiring pathways for the city’s most vulnerable residents. "This bill doesn't do anything to address those individuals," Pruitt said, urging a companion workforce bill.

The committee adopted several key amendments before advancing the bill: - Amendment 12: Clarifies day‑one compliance can include a mix of bundled and unbundled renewable-energy credits (RECs) and sets a maximum unbundled share of 25% at year 5, moving toward greater bundled (locally tied) RECs by year 10. - Amendment 13: Refines applicability for existing, nonconforming data centers and clarifies which structural changes trigger compliance requirements. - Amendment 14: Requires baseline noise measurements be conducted by a city‑approved third‑party noise‑measurement professional. - Amendment 15: Cleans up terminology (removes an unused "local REC" term and tightens bundled/unbundled definitions). - Amendment 16: Expands annual renewable-energy reporting requirements and specifies what documentation is necessary when a developer requests a one‑year waiver at year 5.

The debate during the committee hearing repeatedly returned to two technical fault lines: how the city defines and values bundled versus unbundled RECs, and whether the renewable thresholds would be achievable in practice. Proponents described bundled RECs as credits paired with locally produced renewable energy that more directly support the city’s grid and sustainability goals; unbundled RECs are credits that represent renewable generation but are not tied to the same delivery to the customer.

Nicole Myers, who previously worked with the Missouri Public Service Commission, described the amended approach as a workable compromise. "This is a great compromise that we support," she said, adding that the changes allow flexibility for developers while preserving the city’s sustainability objectives.

Health and nuisance concerns were raised by an acoustics expert who urged the committee to tighten noise standards. "Noise produced by data centers is not like noise from ordinary industrial installations," Dr. Casey Fellerfin testified, recommending measurement metrics better suited to low‑frequency noise and wider setbacks than those proposed in the draft bill.

The committee also discussed public access to compliance reports. Members agreed the annual reports are public records and that the city could make them readily available to improve transparency.

After several hours of testimony and amendment votes, the committee voted to forward Board Bill 49 as amended to the full Board of Aldermen with a "do pass" recommendation. The clerk announced six 'aye' votes; the committee did not record any 'no' votes on the committee recommendation.

The planning commission was scheduled to review the revised text the next day; the Board of Aldermen will consider the ordinance during its forthcoming calendar. If the full Board acts, the zoning changes would establish local land‑use regulation and compliance pathways for prospective data-center projects, while implementation details — including monitoring and enforcement — will depend on the departments and processes outlined in the ordinance and follow‑up rules.