MINIMUM AMBIENT NOISE LEVEL.
Los Angeles Municipal Code § 111.03
in effectSEC. 111.03. MINIMUM AMBIENT NOISE LEVEL.
(Amended by Ord. No. 156,363, Eff. 3/29/82.)
Where the ambient noise level is less than the presumed ambient noise level designated in this section, the presumed ambient noise level in this section shall be deemed to be the minimum ambient noise level for purposes of this chapter.
TABLE II
SOUND LEVEL “A” DECIBELS
(In this chart, daytime levels are to be used from 7:00 a.m. to 10:00 p.m. and nighttime levels from 10:00 p.m. to 7:00 a.m.)
| PRESUMED AMBIENT NOISE LEVEL (dB(A))
ZONE | DAY | NIGHT
A1, A2, RA, RE, RS, RD, RW1, RW2, R1, R2, R3, R4, and R5 | 50 | 40
P, PB, CR, C1, C1.5, C2, C4, C5, and CM | 60 | 55
M1, MR1, and MR2 | 60 | 55
M2 and M3 | 65 | 65
At the boundary line between two zones, the presumed ambient noise level of the quieter zone shall be used.
Source: City of Los Angeles, Charter and Codes (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/los_angeles/latest/lamc/0-0-0-193850Fetched: 10/24/2026