Quiet hours in Port St. Lucie, FL — also called the noise ordinance, nighttime noise rules, or residential quiet time — define the hours during which excessive noise is prohibited.
Port St. Lucie sets decibel-based nighttime limits under Code of Ordinances Chapter 94: in residential areas the maximum drops to 55 dBA/60 dBC between 11:00 p.m. and 7:00 a.m., and these nighttime limits also apply all day on Sundays and holidays.
Port St. Lucie regulates quiet hours through measured sound levels rather than a flat prohibition. Section 94.04 makes it unlawful to create a sound level exceeding the limits in Table I, measured at or beyond the receiving property's real property line. For residential land use the daytime limit (7:00 a.m. to 11:00 p.m.) is 60 dBA/65 dBC and the nighttime limit (11:00 p.m. to 7:00 a.m.) is 55 dBA/60 dBC; commercial is 65/70 dBA and industrial 65/70 dBC across both periods. Section 94.04(g) provides that for any sound projected on a Sunday or holiday, the more restrictive 11:00 p.m. to 7:00 a.m. limits apply all day. Section 94.04(i) independently makes noise 'plainly audible at a distance of one hundred (100) feet or more' a violation, including amplified and portable sound equipment. Loudspeaker and amplifier curfews appear separately in section 94.06(c).
Penalties for violating Chapter 94 are imposed as provided in Chapter 37 of the City Code (section 94.08(d)); each violation is also declared a nuisance under section 94.09, abatable under Ch. 60, Florida Statutes. Code enforcement officers measure sound levels with an ANSI-compliant sound level meter.
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