Flood map coverage in South Carolina
FEMA's National Flood Hazard Layer holds 3,631 FIRM panels for South Carolina from 46 digital flood map databases, reaching 46 of its 46 counties. Computed September 29, 2026.
3,631FIRM panels
53%took effect before September 29, 2016
2026-07-21newest panel (45005C0125E)
104LOMRs in effect
What to expect from lookups here
- Every county has at least one digital FIRM in the NFHL.
- The map that has gone longest without a new panel is Calhoun County (45017C), last revised 2007-04-16.
- 7 panels carry a placeholder effective date in FEMA's data; for points on those panels
firm_panel.effective_dateisnull.
A real lookup in South Carolina
The point is the Census internal point of Allendale County, the county with South Carolina'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=32.97976 -d lon=-81.36326{
"query": {
"lat": 32.97976,
"lon": -81.36326
},
"location": {
"lat": 32.97976,
"lon": -81.36326,
"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": "45005C",
"polygon_id": "45005C_12",
"at_zone_boundary": false,
"other_zones": []
},
"firm_panel": {
"panel": "45005C0250D",
"effective_date": "2010-07-22",
"panel_type": "Countywide, Panel Printed",
"dfirm_id": "45005C",
"other_panels": [
{
"panel": "45049C0075C",
"effective_date": "2010-09-29",
"panel_type": "Countywide, Panel Printed",
"dfirm_id": "45049C"
}
]
},
"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": 32.97976,
"lon": -81.36326
},
"queried_at": "2026-09-29T08:37:57Z",
"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 South Carolina
| Map | DFIRM ID | ID type | Panels | Newest panel | Oldest panel | Over 10 years old | LOMRs in effect |
|---|---|---|---|---|---|---|---|
| Abbeville County | 45001C | County | 27 | 2018-08-16 | 2011-03-03 | 24 | 0 |
| Aiken County | 45003C | County | 170 | 2018-08-16 | 2012-06-19 | 152 | 2 |
| Allendale County | 45005C | County | 20 | 2026-07-21 | 2010-07-22 | 11 | 0 |
| Anderson County | 45007C | County | 128 | 2017-12-21 | 2011-09-29 | 108 | 2 |
| Bamberg County | 45009C | County | 38 | 2026-07-21 | 2010-09-29 | 15 | 0 |
| Barnwell County | 45011C | County | 35 | 2026-07-21 | 2010-09-29 | 17 | 0 |
| Beaufort County | 45013C | County | 144 | 2021-03-23 | 2021-03-23 | 0 | 0 |
| Berkeley County | 45015C | County | 75 | 2018-12-07 | 2018-12-07 | 0 | 15 |
| Calhoun County | 45017C | County | 57 | 2007-04-16 | 2007-04-16 | 57 | 0 |
| Charleston County | 45019C | County | 160 | 2021-01-29 | 2021-01-29 | 0 | 10 |
| Cherokee County | 45021C | County | 32 | 2011-09-16 | 2011-09-16 | 32 | 0 |
| Chester County | 45023C | County | 55 | 2017-05-16 | 2011-09-16 | 52 | 1 |
| Chesterfield County | 45025C | County | 51 | 2025-03-25 | 2011-09-16 | 36 | 0 |
| Clarendon County | 45027C | County | 82 | 2013-08-19 | 2013-08-19 | 75 | 1 |
| Colleton County | 45029C | County | 78 | 2017-12-21 | 2017-12-21 | 0 | 0 |
| Darlington County | 45031C | County | 56 | 2025-03-25 | 2013-02-06 | 49 | 1 |
| Dillon County | 45033C | County | 36 | 2011-05-24 | 2011-05-24 | 36 | 1 |
| Dorchester County | 45035C | County | 108 | 2017-07-18 | 2017-07-18 | 0 | 8 |
| Edgefield County | 45037C | County | 55 | 2018-09-14 | 2011-03-03 | 23 | 0 |
| Fairfield County | 45039C | County | 33 | 2018-09-28 | 2011-05-03 | 25 | 0 |
| Florence County | 45041C | County | 129 | 2025-03-25 | 2014-12-16 | 122 | 0 |
| Georgetown County | 45043C | County | 113 | 2025-06-18 | 2023-05-09 | 0 | 0 |
| Greenville County | 45045C | County | 162 | 2021-05-04 | 2004-12-02 | 118 | 12 |
| Greenwood County | 45047C | County | 49 | 2019-06-20 | 2011-05-03 | 41 | 1 |
| Hampton County | 45049C | County | 43 | 2026-07-21 | 2010-09-29 | 18 | 0 |
| Horry County | 45051C | County | 162 | 2021-12-16 | 2021-12-16 | 0 | 4 |
| Jasper County | 45053C | County | 32 | 2019-10-18 | 2019-10-18 | 0 | 7 |
| Kershaw County | 45055C | County | 85 | 2018-09-28 | 2006-12-19 | 16 | 0 |
| Lancaster County | 45057C | County | 61 | 2018-09-28 | 2011-06-16 | 31 | 2 |
| Laurens County | 45059C | County | 75 | 2019-06-20 | 2012-08-16 | 58 | 1 |
| Lee County | 45061C | County | 58 | 2008-11-19 | 2008-11-19 | 58 | 1 |
| Lexington County | 45063C | County | 122 | 2018-07-05 | 2018-07-05 | 0 | 5 |
| Marion County | 45067C | County | 69 | 2011-10-18 | 2011-10-18 | 69 | 0 |
| Marlboro County | 45069C | County | 30 | 2011-06-16 | 2011-06-16 | 30 | 0 |
| McCormick County | 45065C | County | 30 | 2018-09-14 | 2011-04-04 | 25 | 0 |
| Newberry County | 45071C | County | 62 | 2019-06-20 | 2011-09-16 | 59 | 0 |
| Oconee County | 45073C | County | 63 | 2017-12-21 | 2009-09-11 | 41 | 1 |
| Orangeburg County | 45075C | County | 129 | 2014-01-16 | 2014-01-16 | 129 | 2 |
| Pickens County | 45077C | County | 63 | 2017-12-21 | 2008-04-16 | 45 | 0 |
| Richland County | 45079C | County | 138 | 2017-12-21 | 2017-12-21 | 0 | 13 |
| Saluda County | 45081C | County | 22 | 2007-06-18 | 2007-06-18 | 22 | 1 |
| Spartanburg County | 45083C | County | 158 | 2021-05-04 | 2011-01-06 | 140 | 2 |
| Sumter County | 45085C | County | 100 | 2022-10-27 | 2007-02-16 | 5 | 4 |
| Union County | 45087C | County | 21 | 2021-05-04 | 2011-08-02 | 18 | 0 |
| Williamsburg County | 45089C | County | 99 | 2022-10-27 | 2012-11-16 | 79 | 0 |
| York County | 45091C | County | 116 | 2017-05-16 | 2008-09-26 | 88 | 7 |
Source: FEMA NFHL layers 1, 3 and 22 and the Census Bureau county gazetteer, computed September 29, 2026. All states ยท API reference