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Draft ordinance limits data‑center noise to 55 dB at property line and calls for monitoring
Summary
Draft language submitted to Smyth County would cap operational noise at 55 decibels at the property line, sets tonal‑noise measurement rules, and requires post‑occupancy testing during peak cooling months and annual follow‑up for 10 years.
Smyth County’s draft zoning text amendment sets an operational noise cap of 55 decibels at the property line and includes technical octave‑band criteria for prominent tonal noise.
A county staff member summarized the measurement language: “Noise generated by the facility shall not exceed 55 decibels.” The draft also defines a prominent tone by octave‑band thresholds and excludes temporary construction and emergency operations from the limits.
Post‑construction monitoring is part of the draft. County staff said noise shall be evaluated during permitting at 90‑day intervals for each phase’s occupancy permit and annually thereafter for 10 years, with inspections conducted by county staff or a qualified third party during peak cooling operations (June–August). If noise exceeds limits, staff said the county may pursue enforcement to obtain compliance.
