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California -- population 1,584,652

Sacramento County, CA Property Research

Real data from four public sources, not an internal estimate: the EPA's radon zone classification, Census housing-age records, FEMA's natural hazard risk index, and NOAA's recorded storm history for this county. Every figure below links to where it actually comes from.

Hazard Summary

Sacramento County, CA hazard summary: FEMA National Risk Index rated Relatively High; EPA radon zone 3 of 3; most frequently recorded hazard is flood (105 events, 2015-2024).

Radon Risk

Zone 3 -- low potential. EPA predicts an average indoor radon screening level below 2 pCi/L for this county.

This is a county-wide prediction from geology and soil data, not a measurement of any specific home -- EPA recommends testing every home regardless of zone. See our guide on negotiating radon mitigation after inspection.

Source: EPA Map of Radon Zones

Housing Age

Sacramento County has 593,616 housing units. About 32% were built in 1969 or earlier -- old enough that knob-and-tube wiring, lead-based paint, and galvanized supply lines are all realistic possibilities worth checking for, not just a general inspection line item.

2020 or later
5,503
2010-2019
33,035
2000-2009
88,635
1990-1999
75,683
1980-1989
98,613
1970-1979
105,118
1960-1969
67,369
1950-1959
68,049
1940-1949
23,418
1939 or earlier
28,193

Does knob-and-tube wiring have to be replaced before closing?

Source: U.S. Census Bureau, ACS 5-Year Estimates, Table B25034

Natural Hazard Risk

FEMA rates Sacramento County's overall natural hazard risk as Relatively High, relative to the rest of the country.

DroughtRelatively High
Inland FloodingRelatively High
EarthquakeRelatively High
Heat WaveRelatively Moderate
WildfireRelatively Moderate
Source: FEMA National Risk Index

Recorded Storm History (2015-2024)

NOAA recorded 133 storm events in Sacramento County between 2015 and 2024. This is actual event history, not a risk model -- the counts below are individually logged storms, not a prediction.

Flood
105
Heavy Rain
12
Flash Flood
5
Tornado
4
Funnel Cloud
3
Thunderstorm Wind
2
Hail
2
Source: NOAA National Centers for Environmental Information, Storm Events Database

Guides Relevant to This County's Housing Stock

Does a Standard Home Inspection Check for Asbestos?What Is a Federal Pacific Stab-Lok Panel and Why Inspectors Flag It?Do Federal Pacific (FPE) Panels Affect Insurance Like Zinsco Panels?Will a Zinsco Panel Fail a 4-Point Inspection?How to Spot Polybutylene Pipes Before Buying a HouseCan You Get Home Insurance with Polybutylene Plumbing?

Get Your Free Property Report

BeforeRegret pulls live seismic hazard data, validates the address, and builds era- and county-specific inspection priorities and seller questions into one report -- with anything not yet independently verified clearly labeled, not guessed at.

Get Your First Report Free

This page reports what these four public agencies have published for Sacramento County as a whole -- it is not an assessment of any specific address or property, and does not replace a licensed home inspection, radon test, or insurance review for a specific home. Data last checked August 10, 2026.