Fairfield, CA Noise from Specific Sources: Car Alarm Limits (2026)

Section 25.1405(C) exempts safety, warning, and alarm devices, including house and car alarms, and other warning devices designed to protect health, safety, and welfare, provided such devices are not negligently maintained or operated, from the noise standards in § 25.1403's Table 25.1401 and the specific prohibitions in § 25.1404. The exemption is conditional, not absolute: it protects an alarm that sounds because it is doing its job, but the 'not negligently maintained or operated' qualifier means a car alarm left to blare for hours from a faulty sensor, or repeatedly triggered by poor upkeep, falls outside the protection and can be treated as an ordinary noise violation under § 25.1403 or § 25.1404's disturbance-based clauses.

The ordinance sets no specific time limit on how long an alarm may sound before it counts as negligently maintained, leaving that judgment to code enforcement and police officers responding to a complaint. This exemption sits alongside § 25.1405(A)'s exemption for residential equipment like air conditioning, but alarms carry the added negligence condition that HVAC equipment does not.