Norwalk, CA Noise Ordinances: Amplified Music & Outdoor Sound (2026)

150(A)(1) makes it unlawful within the City to use or operate any radio receiving set, musical instrument, phonograph, television set, or other sound-producing or reproducing device, at any time, in a manner that produces noise levels on residential land disturbing the peace, quiet and comfort of neighboring residents or any reasonable person of normal sensitiveness. That rule has no time-of-day carve-out; it applies around the clock and covers home stereos, live musicians and amplified party sound alike. 150(C) targets loudspeakers and amplifiers used for advertising: broadcasting sound onto public streets for commercial advertising or to attract public attention to a building, structure or activity is barred unless the operator has first obtained a permit from the City.

That permit requirement functions independently of the general noise nuisance rule; a business cannot cure a lack of permit simply by staying under a decibel threshold. Both provisions sit inside Article III's "Particular Acts" list alongside horn use, exhaust noise and construction-hour limits, and both are enforced against the same technical measurement backdrop set out earlier in the article for taking sound readings at the property line.