Dark Sky Rules: Anza vs Riverside
How do dark sky rules rules compare between Anza, CA and Riverside, CA?
Riverside has fewer restrictions than Anza.
Anza, CA
Riverside County
Riverside County Ordinance 655, the Mount Palomar Light Pollution Ordinance, imposes some of the strictest outdoor-lighting rules in California. Within approximately 45 miles of Palomar Observatory (Zones A and B) all new exterior lighting must be shielded, low-pressure or filtered low-color-temperature sodium, and most decorative lighting must be extinguished after 11 p.m.
View full Anza rules →Riverside, CA
Riverside County
Riverside's municipal code includes outdoor lighting standards designed to reduce light pollution and protect the night sky. Riverside County Ordinance 915 establishes requirements for shielded fixtures and limits on upward light emission. New development in the city must submit lighting plans showing fully shielded, downward-directed fixtures. The proximity of Mount Palomar Observatory has historically influenced lighting regulations in the region.
View full Riverside rules →Key Facts Comparison
| Fact | Anza | Riverside |
|---|---|---|
| - | - | |
| County Ordinance | - | Ordinance 915 — outdoor lighting standards |
| Shielding | - | Fully shielded fixtures required for new development |
| Light Direction | - | Downward-directed only |
| Palomar Influence | - | Observatory proximity affects regional standards |
| Plan Review | - | Lighting plans required with development |
Highlighted rows indicate differences between cities.
Anza FAQ
Riverside FAQ
Does Riverside have dark-sky lighting rules?
Yes, Riverside County Ordinance 915 establishes outdoor lighting standards to reduce light pollution. The city requires new development to use fully shielded, downward-directed fixtures. The Mount Palomar Observatory's proximity has influenced regional lighting standards.
What type of outdoor lights are required in Riverside?
New development must use fully shielded fixtures that direct light downward. Upward light emission is restricted. Lighting plans are reviewed as part of the development permit process.
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