How to report a pothole in Diamond Bar
Potholes, streetlights, graffiti, sidewalks and illegal dumping in Diamond Bar (Los Angeles County) go to the channels below.
Online reporting channel: not found yet. Try the city's main website or city hall phone below.
Official site: http://www.ci.diamond-bar.ca.us
For emergencies call 911.
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Last checked 2026-10-16. Sources: . Spot something wrong? Tell us.