riskbycounty
FEMA NRI v1.20Released December 2025Methodology

Pottawattamie County Disaster Risk

Pottawattamie County, Iowa

FEMA Risk Rating

Relatively Low

NRI score (0–100 relative scale)

80.4

FEMA composite county value

State Rank

#6

of 99, sorted high to low by RiskByCounty

Flood NRI score

74.6

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.

Tornado

95.2 / 100

Flood

74.6 / 100

Higher of FEMA Coastal Flooding (Not available) and Inland Flooding (74.6) NRI scores.

Wildfire

67.2 / 100

Earthquake

26.9 / 100

Hurricane

0.0 / 100

FEMA NRI data summary

Selected hazard scores for Pottawattamie County

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

Tornado
95.2
Flood
74.6
Wildfire
67.2
Earthquake
26.9
Hurricane
0.0

Higher of FEMA Coastal Flooding and Inland Flooding NRI scores

Displayed flood score
74.6
Coastal Flooding
Not available
Inland Flooding
74.6

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

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Frequently Asked Questions

How many Iowa county records are included?
RiskByCounty includes 99 Iowa county records from FEMA NRI v1.20 (December 2025).
Which FEMA county ratings appear in Iowa?
FEMA NRI v1.20 (December 2025) county rating counts for Iowa: Very Low: 64; Relatively Low: 30; Relatively Moderate: 5; Relatively High: 0; Very High: 0; Not available: 0.
How complete are the five selected hazard fields for Iowa?
FEMA NRI v1.20 (December 2025) availability among 99 county records: Flood: 99 of 99; Wildfire: 99 of 99; Tornado: 99 of 99; Earthquake: 99 of 99; Hurricane: 82 of 99. RiskByCounty displays five selected hazard categories out of FEMA's 18.
What FEMA NRI information is available for Pottawattamie County, IA?
Pottawattamie County has an official FEMA NRI v1.20 composite rating of Relatively Low and an NRI score (0–100 relative scale) of 80.4. RiskByCounty ranks it 6th of 99 Iowa county records when sorting the FEMA composite NRI scores from high to low.
Which selected hazard scores are shown for Pottawattamie County?
RiskByCounty displays five selected hazard categories out of FEMA's 18 using FEMA NRI v1.20 (December 2025). For Pottawattamie County, Tornado: 95.2; Flood: 74.6; Wildfire: 67.2; Earthquake: 26.9; Hurricane: 0.0.
How is flood displayed for Pottawattamie County?
RiskByCounty's flood display is the higher of FEMA Coastal Flooding and Inland Flooding NRI scores. For Pottawattamie County, Coastal Flooding is Not available, Inland Flooding is 74.6, and the displayed flood score is 74.6.

Counties with Similar Risk

Woodbury County

Iowa

+2.8

Relatively Moderate

NRI score 83.3

Black Hawk County

Iowa

-3.8

Relatively Low

NRI score 76.6

Scott County

Iowa

+4.5

Relatively Moderate

NRI score 84.9

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.

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