Placentia, CA

52,826 people · 7,847 per sq mi · 6.7 sq mi

Measured at the center point marked on the map, with the data a report uses. A report for an address adds the flood zone, elevation, nearby schools, noise sources, your commute, and what to verify.

Natural hazard risk

FEMA National Risk Index, December 2025

Relatively Highoverall, census tract at the city center

Inland (river and rain) flooding: Relatively High
Earthquake: Relatively High
Wildfire: Relatively Low
Heat wave: Relatively Low
Tornado: Very Low
Hail: Very Low
Strong wind: Very Low
Landslide: Very Low

FEMA National Risk Index, December 2025

Storms and earthquakes

NOAA Storm Prediction Center, NOAA IBTrACS, USGS

Tornado tracks within 9 mi2 since 2000 · strongest EF1 · latest February 2023: 8
Tropical storm tracks within 50 mistrongest Category -4: 1
Recorded earthquakes within 31 mi7 of magnitude 5 or more · largest M5.9: 139

NOAA Storm Prediction Center, NOAA IBTrACS, USGS

Reported crime

No FBI figures for a Placentia police department. A report matches the nearest reporting agency instead.

Typical rent

No HUD Fair Market Rent loaded for this county.

Outdoor air

EPA Downscaler model via CDC, census tract at the city center. Annual averages, so a typical day rather than the worst one.

ModerateEPA Air Quality Index range

Fine particles (PM2.5), annual average2022 · higher than 98% of US tracts · EPA standard 9.0: 11.0 µg/m³
Ozone, average daily 8-hour peak2022: 44 ppb

EPA Downscaler model via CDC, census tract at the city center. Annual averages, so a typical day rather than the worst one.

Disasters, Superfund, radon

OpenFEMA, EPA National Priorities List, EPA radon zones

Federal disaster declarations for the county, last 20 yearsmostly fire (14), flood (4), biological (2) · latest Norte Fire, October 2026: 21
Superfund sites within 10 mi: 1
EPA radon zone for the countylow potential: Zone 3