Manteca, CA Noise from Specific Sources: Generator Noise (2026)
Key Facts
- Noise cap
- 76 dBA at 23 feet
- Exemption scope
- power outages only
- Testing duration
- 30 min max per 7 days
- Testing window
- 11am-8pm Mon-Sat
- Enclosure
- must be sound-absorbing
Summary
During power outages, stationary emergency generators in Manteca are exempt from the city's normal noise table but capped at 76 dBA at 23 feet, and testing is limited to once a week, 30 minutes, 11 a.m.-8 p.m. Monday-Saturday.
Sound resulting from the operation of any stationary emergency generator in any zoning district shall be considered restoration of electrical service and are exempt from the sound rating values set forth in Table 17.58.050-1 (Maximum Permissible Sound Pressure Levels). This exemption only applies when operated during power outages; provided however, the generator motor must be enclosed in a sound absorbing encasement and in no event shall the sound rating value of generators in any district exceed 76 dBA at 23 feet or 7 meters. Stationary emergency generators operating in all districts may be operated for testing purposes one time for a period not to exceed thirty minutes in any seven-day period. Testing of stationary emergency generators in all districts is permitted between the hours of 11:00 a.m. through 8:00 p.m. Monday through Saturday.
a.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4829770; v11 updated 2026-04-21).
Full Breakdown
Section 17.58.050(D)(9) treats a stationary emergency generator's noise as an exempt "restoration of electrical service" activity, but only while it's actually running during a power outage: the exemption doesn't extend to load-shedding, peak-shaving, or routine backup use outside a genuine emergency. The generator motor must sit in a sound-absorbing enclosure, and its sound rating can't exceed 76 dBA measured at 23 feet (7 meters) in any zoning district. Owners may test a stationary emergency generator once every seven days, for no more than 30 minutes, and only between 11:00 a.m. and 8:00 p.m., Monday through Saturday.
Violations & Fines
Running a generator above 76 dBA at 23 feet, testing outside the Monday-Saturday 11 a.m.-8 p.m. window, or testing more than once in seven days violates § 17.58.050 and defaults to a § 1.16.010 infraction.
Frequently Asked Questions
Can I run a whole-house generator during a Manteca power outage?
When can I test my backup generator?
Sources & Official References
Other rules in Manteca
California rules heatmap·Compare Manteca to another location·View the California noise from specific sources overview
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