New Orleans, LA Noise from Specific Sources: HVAC & Mechanical Noise (2026)

Code of Ordinances Sec. 66-203(7) makes it unlawful "to operate or permit the operation of any stationary machinery, air-conditioners, air-handling equipment, fans, or similar devices in such a manner as to exceed Table 1 of the receiving land use categories when measured on receiving property", meaning the test is taken at the neighboring property, not at the unit itself. Rather than requiring instant compliance, subsection (7)a sets an age-based grace period once a violation is determined: units ten years or older must come into compliance within six months, units five to ten years old within one year, and units under five years old within two years.

Subsection (7)b clarifies that owners are not limited to replacing the unit, they remain responsible for "taking other reasonable actions, other than replacement, directed at reducing noise levels" such as sound baffling, relocation or scheduling changes, at any point during or after the grace period. Because the standard runs through Table 1, the applicable ceiling depends on the receiving zone: residential neighbors get 55 dBA L10/60 dBA Lmax at night versus 60/70 by day, while a commercial receiving property gets the looser 60/65 nighttime figures.

Enforcement carries the Sec. 66-140 misdemeanor penalty (fine up to the state-law maximum, up to 90 days imprisonment, or both, per day) once the applicable compliance deadline has passed.