Data center noise litigation wave and the dBA measurement gap (2026)

United States — a coordinated-in-effect wave of DATA CENTER NOISE LITIGATION during 2026: AT LEAST SIX SUITS as of September 2026, in MOUNT PLEASANT, WISCONSIN; SOUTHAVEN, MISSISSIPPI; VINELAND, NEW JERSEY; DOWAGIAC, MICHIGAN; NORTH TONAWANDA, NEW YORK; and HOOD COUNTY, TEXAS. LEAD ACTIONS: (a) MICROSOFT, Mount Pleasant, Wisconsin \u2014 FEDERAL DISTRICT COURT CLASS ACTION filed JUNE 2026 by residents alleging the facility produces a LOW-FREQUENCY HUM UNDETECTABLE BY STANDARD dBA MONITORS that harms quality of life and property values; the complaint alleges Microsoft 'could have used adequate soundproofing, acoustic barriers, low-noise cooling systems, and proper monitoring and prevention plans'. (b) xAI, Southaven, Mississippi \u2014 filed JUNE 2026 by WEITZ & LUXENBERG for residents, claiming noise, vibration AND AIR POLLUTION from the GAS TURBINES supporting the data center. LEGAL THEORIES: NUISANCE and NEGLIGENCE, both long-settled. Per Wilmer Hale, 'Data center operators as the defendants in such lawsuits is new' \u2014 the novelty is the defendant class, not the doctrine, which is why these suits are hard to dispose of early. THE MEASUREMENT GAP IS THE REASON THIS ENTRY EXISTS AND IT BEARS ON MANY OTHERS IN THIS DATASET: conventional dBA monitors FAIL TO DETECT the lower-frequency sound generated by data center cooling systems. dBA is A-WEIGHTED sound measurement, which by design attenuates low-frequency content to approximate human loudness perception at moderate levels. Municipal noise ordinances are written almost universally in dBA. THE CONSEQUENCE: a data center can COMPLY WITH A STRICT dBA LIMIT, MEASURED HONESTLY, WHILE PRODUCING EXACTLY THE SOUND RESIDENTS COMPLAIN OF \u2014 because the ordinance's instrument is blind to it. Standard municipal noise ordinances therefore cannot effectively enforce against this class of emission, which is the regulatory gap plaintiffs are exploiting through nuisance litigation. ENTRIES IN THIS DATASET DIRECTLY AFFECTED, none of which state a weighting or a low-frequency metric in any located source: Joplin MO data center regulations (2026) (45 dB at residential property lines, with mandatory pre-construction baseline testing \u2014 the baseline requirement helps but does not cure a weighting blind spot), Portage IN Technology Campus district data center rules (2026) (55 dB), Corunna MI data center zoning ordinance (2026) (unspecified noise maxima), North Richland Hills TX data center SUP regulations (2026), Canton OH data center zoning chapter (2026) (its 2,500-foot 'sensitive receptor' radius is a distance rule, which is arguably a better instrument precisely because it does not depend on a measurement the ordinance cannot make). DRAFTING IMPLICATION worth recording: a data center noise standard should specify dBC or a low-frequency band metric, or use distance and enclosure requirements, rather than relying on an unqualified dBA cap. NOTE: two of the six named locations already appear in this dataset for unrelated measures \u2014 North Tonawanda for a data center moratorium and Hood County for having REJECTED one \u2014 so the suits reach jurisdictions at opposite ends of the regulatory spectrum.