Hidalgo County sets no local decibel limits for unincorporated areas because Texas counties cannot adopt a noise-level ordinance. The only numeric standard is the state disorderly-conduct presumption: noise above 85 decibels is unreasonable, but only after a peace officer or magistrate gives notice.
Unlike cities, Hidalgo County has not and legally cannot adopt a dBA table setting daytime and nighttime caps at the property line. The single decibel figure that matters in unincorporated areas comes from Texas Penal Code Sec. 42.01(c)(2): noise is presumed unreasonable if it exceeds 85 decibels, but that presumption arises only after the person has received notice from a magistrate or peace officer that the noise is a public nuisance. Before that notice, there is no fixed number - officers judge whether noise is unreasonable under the totality of circumstances. The Hidalgo County Sheriff's Office enforces Sec. 42.01. Any true property-line decibel schedule you encounter in the county comes from an incorporated city's ordinance, not from the county.
Exceeding the 85-decibel presumption after officer notice supports a disorderly-conduct charge under Penal Code Sec. 42.01 - a Class C misdemeanor, fine up to $500. There is no separate county decibel-limit citation because the county has no decibel ordinance.
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