FEMA NRI v1.20Released December 2025Methodology

Maine Disaster Risk

Natural disaster risk data for all 16 counties.

FEMA release

December 2025

Mean county NRI score

56.7

Counties with Data

of 16 total

County risk atlas

Maine hazard exposure by county

FEMA NRI v1.20 scores on a 0–100 relative scale. Toggle the composite and five selected hazard categories out of FEMA's 18. Flood is the higher of Coastal Flooding and Inland Flooding NRI scores.

Counties

16/16

Mean county NRI score

56.7

Risk layers

Highest Risk Counties

York County

Relatively Moderate

NRI score 81.5

Aroostook County

Relatively Low

NRI score 80.4

Penobscot County

Relatively Low

NRI score 78.0

Cumberland County

Relatively Low

NRI score 77.0

Kennebec County

Relatively Low

NRI score 75.2

Lowest Risk Counties

Sagadahoc County

Very Low

NRI score 23.3

Knox County

Very Low

NRI score 28.6

Lincoln County

Very Low

NRI score 31.8

Waldo County

Very Low

NRI score 40.6

Franklin County

Relatively Low

NRI score 43.6

All Maine Counties

County	NRI score	FEMA Rating	Flood	Wildfire	Tornado	Earthquake
York County	81.5	Relatively Moderate	86.6	56.3	46.5	83.8
Aroostook County	80.4	Relatively Low	76.1	26.2	15.7	77.7
Penobscot County	78.0	Relatively Low	83.0	29.3	32.3	79.1
Cumberland County	77.0	Relatively Low	78.4	38.9	25.5	81.1
Kennebec County	75.2	Relatively Low	80.1	33.5	25.9	76.0
Somerset County	67.9	Relatively Low	61.8	22.1	16.3	59.4
Oxford County	65.9	Relatively Low	73.3	27.2	16.7	60.3
Androscoggin County	59.1	Relatively Low	61.6	24.8	19.8	74.9
Hancock County	55.0	Relatively Low	77.0	10.8	15.8	51.2
Piscataquis County	52.4	Relatively Low	35.2	9.2	8.9	40.6
Washington County	47.6	Relatively Low	74.6	21.8	11.0	46.7
Franklin County	43.6	Relatively Low	53.0	16.0	12.4	45.8
Waldo County	40.6	Very Low	58.8	17.6	15.3	42.7
Lincoln County	31.8	Very Low	69.8	18.7	14.9	47.1
Knox County	28.6	Very Low	69.2	16.8	12.8	45.9
Sagadahoc County	23.3	Very Low	74.8	14.3	13.1	47.9

Frequently Asked Questions

How many Maine county records are included?

RiskByCounty includes 16 Maine county records from FEMA NRI v1.20 (December 2025).

Which FEMA county ratings appear in Maine?

FEMA NRI v1.20 (December 2025) county rating counts for Maine: Very Low: 4; Relatively Low: 11; Relatively Moderate: 1; Relatively High: 0; Very High: 0; Not available: 0.

How complete are the five selected hazard fields for Maine?

FEMA NRI v1.20 (December 2025) availability among 16 county records: Flood: 16 of 16; Wildfire: 16 of 16; Tornado: 16 of 16; Earthquake: 16 of 16; Hurricane: 16 of 16. RiskByCounty displays five selected hazard categories out of FEMA's 18.

Official Ready.gov resource

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

Visit Ready.gov →

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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