Interior sound level limits.
Riverside Municipal Code § 7.30.015
in effect7.30.015 - Interior sound level limits.
A. No person shall operate or cause to be operated, any source of sound indoors which causes the noise level, when measured inside another dwelling unit, school or hospital, to exceed:
1. The interior noise standard for the applicable land category area, up to five decibels, for a cumulative period of more than five minutes in any hour;
2. The interior noise standard for the applicable land use category, plus five decibels, for a cumulative period of more than one minute in any hour;
3. The interior noise standard for the applicable land use category, plus ten decibels or the maximum measured ambient noise level, for any period of time.
B. If the measured interior ambient noise level exceeds that permissible within the first two noise limit categories in this section, the allowable noise exposure standard shall be increased in five decibel increments in each category as appropriate to reflect the interior ambient noise level. In the event the interior ambient noise level exceeds the third noise limit category, the maximum allowable interior noise level under said category shall be increased to reflect the maximum interior ambient noise level.
C. The interior noise standard for various land use districts shall apply, unless otherwise specifically indicated, within structures located in designated zones with windows opened or closed as is typical of the season.
Table 7.30.015
Interior Noise Standard
Land Use Category | Time Period | Noise Level
Residential | Night (10 p.m. to 7 a.m.) Day (7 a.m. to 10 p.m.) | 35 dBA 45 dBA
School | 7 a.m. to 10 p.m. (while school is in session) | 45 dBA
Hospital | Any time | 45 dBA
(Ord. 7489 § 22, 23(Exh. B), 2019; Ord. 6273 § 1 (part), 1996)
Source: City of Riverside, California, Municipal Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/ca/riverside/codes/code_of_ordinances?nodeId=PTIICOOR_TIT7NOCO_CH7.30NUINSOLELI_7.30.015INSOLELIFetched: 11/1/2026