Flood map coverage in Utah
FEMA's National Flood Hazard Layer holds 1,438 FIRM panels for Utah from 19 digital flood map databases, reaching 18 of its 29 counties. Computed September 29, 2026.
1,438FIRM panels
76%took effect before September 29, 2016
2026-06-23newest panel (49049C0305G)
130LOMRs in effect
What to expect from lookups here
- 11 counties have no digital FIRM in the NFHL (listed below). Points there come back
"mapped": false. - 3 of the maps are community-numbered, so parts of the counties they sit in may have no digital map.
- The map that has gone longest without a new panel is Town of Paragonah (490075), last revised 2005-06-02.
A real lookup in Utah
The point is the Census internal point of Utah County, the county with Utah's most recently effective FIRM panel. FEMA's map puts it in zone X (area of minimal flood hazard). Recorded September 29, 2026.
curl -sG https://api.floodzoneapi.com/api/v1/flood/zone \
-H "Authorization: Bearer $FZA_KEY" \
-d lat=40.12042 -d lon=-111.66851{
"query": {
"lat": 40.12042,
"lon": -111.66851
},
"location": {
"lat": 40.12042,
"lon": -111.66851,
"geocoder": null,
"precision": "input_coordinates",
"matched_address": null,
"candidates": null,
"county": null,
"county_fips": null,
"state": null
},
"flood_zone": {
"mapped": true,
"zone": "X",
"subtype": "AREA OF MINIMAL FLOOD HAZARD",
"description": "Area of minimal flood hazard. Outside the Special Flood Hazard Area.",
"sfha": false,
"static_bfe": null,
"depth": null,
"dfirm_id": "49049C",
"polygon_id": "49049C_2054",
"at_zone_boundary": false,
"other_zones": []
},
"firm_panel": {
"panel": "49049C0756F",
"effective_date": "2020-06-19",
"panel_type": "Countywide, Panel Printed",
"dfirm_id": "49049C",
"other_panels": []
},
"source": {
"dataset": "FEMA National Flood Hazard Layer (NFHL)",
"service": "https://hazards.fema.gov/arcgis/rest/services/public/NFHL/MapServer",
"layers": [
{
"id": 28,
"name": "Flood Hazard Zones"
},
{
"id": 3,
"name": "FIRM Panels"
}
],
"query_point": {
"lat": 40.12042,
"lon": -111.66851
},
"queried_at": "2026-09-29T08:38:00Z",
"cached": true,
"cache_ttl_seconds": 86400
},
"notice": "Informational. This is the zone shown on FEMA's effective flood map (NFHL) at this point. It is not a Standard Flood Hazard Determination (FEMA Form 086-0-32), a prediction of flood risk, or an insurance quote, and it does not reflect a Letter of Map Amendment issued for a single structure."
}Every digital flood map in Utah
| Map | DFIRM ID | ID type | Panels | Newest panel | Oldest panel | Over 10 years old | LOMRs in effect |
|---|---|---|---|---|---|---|---|
| Box Elder County | 49003C | County | 160 | 2010-09-29 | 2010-09-29 | 160 | 3 |
| Cache County | 49005C | County | 77 | 2023-05-09 | 2011-05-24 | 32 | 1 |
| Carbon County | 49007C | County | 63 | 2012-05-02 | 2012-05-02 | 63 | 2 |
| City of Eureka | 490079 | Community-numbered | 3 | 2007-12-04 | 2007-12-04 | 3 | 1 |
| City of Nephi | 490229 | Community-numbered | 3 | 2007-12-04 | 2007-12-04 | 3 | 0 |
| Davis County | 49011C | County | 75 | 2022-09-15 | 2007-06-18 | 42 | 18 |
| Grand County | 49019C | County | 49 | 2020-04-03 | 1981-10-06 | 44 | 3 |
| Morgan County | 49029C | County | 46 | 2017-12-07 | 2010-04-19 | 25 | 2 |
| Salt Lake County | 49035C | County | 110 | 2021-11-19 | 2001-09-21 | 96 | 38 |
| Sanpete County | 49039C | County | 55 | 2012-05-02 | 2012-05-02 | 55 | 1 |
| Sevier County | 49041C | County | 19 | 2012-12-18 | 2012-12-18 | 19 | 0 |
| Summit County | 49043C | County | 81 | 2021-03-23 | 2006-03-16 | 51 | 2 |
| Tooele County | 49045C | County | 168 | 2009-11-18 | 2009-11-18 | 168 | 3 |
| Town of Paragonah | 490075 | Community-numbered | 1 | 2005-06-02 | 2005-06-02 | 1 | 0 |
| Uintah County | 49047C | County | 103 | 2010-10-06 | 2010-10-06 | 103 | 2 |
| Utah County | 49049C | County | 152 | 2026-06-23 | 2020-06-19 | 0 | 1 |
| Wasatch County | 49051C | County | 65 | 2012-03-15 | 2012-03-15 | 65 | 6 |
| Washington County | 49053C | County | 115 | 2009-04-02 | 2009-04-02 | 115 | 44 |
| Weber County | 49057C | County | 93 | 2023-11-30 | 2005-12-16 | 53 | 3 |
Counties with no digital FIRM in the NFHL
No digital flood map in the NFHL links to these counties (Census county FIPS in brackets). Addresses here return "mapped": false; FEMA may still have paper maps for them.
- Beaver County (49001)
- Daggett County (49009)
- Duchesne County (49013)
- Emery County (49015)
- Garfield County (49017)
- Kane County (49025)
- Millard County (49027)
- Piute County (49031)
- Rich County (49033)
- San Juan County (49037)
- Wayne County (49055)
Source: FEMA NFHL layers 1, 3 and 22 and the Census Bureau county gazetteer, computed September 29, 2026. All states ยท API reference