Commission sets 55 dBA daytime, 45 dBA nighttime limits for data‑center draft

Sep 23, 2026

The planning commission agreed the draft ordinance should require data‑center noise not exceed 55 dBA (6AM–10PM) and 45 dBA (10PM–6AM), measured at the nearest residential property line, and added the limits to the noise section.

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The Yankton County Planning Commission inserted numeric noise limits into the draft data‑center ordinance during a work session, specifying that a data center’s noise shall not exceed 55 dBA during daytime hours (6AM–10PM) and 45 dBA at night (10PM–6AM), measured at the nearest residential property line. Chair (speaker 3) read the finalized sentence: "The noise level of the data center shall not exceed 55 dBA during daytime, 6AM to 10PM, and 45 dBA nighttime, 10PM to 6AM, as measured at the property line."

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