riskbycounty
FEMA NRI v1.20Released December 2025Methodology

Union County Disaster Risk

Union County, Pennsylvania

FEMA Risk Rating

Relatively Low

NRI score (0–100 relative scale)

55.2

FEMA composite county value

State Rank

#50

of 67, sorted high to low by RiskByCounty

Flood NRI score

71.8

higher coastal/inland value

Hazard Risk Breakdown

Five selected hazard categories out of FEMA's 18. Values are FEMA NRI v1.20 scores on a 0–100 relative scale.

Hurricane

74.3 / 100

Flood

71.8 / 100

Higher of FEMA Coastal Flooding (Not available) and Inland Flooding (71.8) NRI scores.

Earthquake

43.6 / 100

Tornado

33.7 / 100

Wildfire

10.4 / 100

FEMA NRI data summary

Selected hazard scores for Union County

Among the five hazard categories displayed by RiskByCounty, hurricane has the highest NRI score for this county.

Hurricane
74.3
Flood
71.8
Earthquake
43.6
Tornado
33.7
Wildfire
10.4

Higher of FEMA Coastal Flooding and Inland Flooding NRI scores

Displayed flood score
71.8
Coastal Flooding
Not available
Inland Flooding
71.8

These five categories are a selected subset of FEMA's 18 natural hazards. FEMA's composite score and official rating are separate fields in the National Risk Index dataset.

FEMA National Risk Index documentation

Official Ready.gov resource

Continue to Ready.gov for federal emergency-planning information maintained outside RiskByCounty.

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Frequently Asked Questions

How many Pennsylvania county records are included?
RiskByCounty includes 67 Pennsylvania county records from FEMA NRI v1.20 (December 2025).
Which FEMA county ratings appear in Pennsylvania?
FEMA NRI v1.20 (December 2025) county rating counts for Pennsylvania: Very Low: 8; Relatively Low: 38; Relatively Moderate: 16; Relatively High: 4; Very High: 1; Not available: 0.
How complete are the five selected hazard fields for Pennsylvania?
FEMA NRI v1.20 (December 2025) availability among 67 county records: Flood: 67 of 67; Wildfire: 67 of 67; Tornado: 67 of 67; Earthquake: 67 of 67; Hurricane: 67 of 67. RiskByCounty displays five selected hazard categories out of FEMA's 18.
What FEMA NRI information is available for Union County, PA?
Union County has an official FEMA NRI v1.20 composite rating of Relatively Low and an NRI score (0–100 relative scale) of 55.2. RiskByCounty ranks it 50th of 67 Pennsylvania county records when sorting the FEMA composite NRI scores from high to low.
Which selected hazard scores are shown for Union County?
RiskByCounty displays five selected hazard categories out of FEMA's 18 using FEMA NRI v1.20 (December 2025). For Union County, Hurricane: 74.3; Flood: 71.8; Earthquake: 43.6; Tornado: 33.7; Wildfire: 10.4.
How is flood displayed for Union County?
RiskByCounty's flood display is the higher of FEMA Coastal Flooding and Inland Flooding NRI scores. For Union County, Coastal Flooding is Not available, Inland Flooding is 71.8, and the displayed flood score is 71.8.

Counties with Similar Risk

Greene County

Pennsylvania

-0.1

Relatively Low

NRI score 55.1

Venango County

Pennsylvania

+0.3

Relatively Low

NRI score 55.6

Snyder County

Pennsylvania

-1.0

Relatively Low

NRI score 54.3

Published by RiskByCounty

County summaries are deterministic transformations of frozen FEMA county fields. No external subject-matter reviewer is credited.

Published · Updated

Data Source

County data sourced from FEMA National Risk Index v1.20, released December 2025. Values are labeled NRI score (0–100 relative scale). RiskByCounty displays five selected hazard categories out of FEMA's 18; flood is the higher of the Coastal Flooding and Inland Flooding source scores.

RiskByCounty presents county-level source fields and deterministic arithmetic summaries.

Explore more data for Union County

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