Flood map coverage in Connecticut

FEMA's National Flood Hazard Layer holds 1,176 FIRM panels for Connecticut from 8 digital flood map databases, reaching 8 of its 8 counties. Computed September 29, 2026.

1,176FIRM panels

82%took effect before September 29, 2016

2023-09-07newest panel (09015C0065F)

107LOMRs in effect

What to expect from lookups here

Every county has at least one digital FIRM in the NFHL.
2 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 Somers (090112), last revised 2006-08-16.

A real lookup in Connecticut

The point is the Census internal point of Windham County, the county with Connecticut's most recently effective FIRM panel. FEMA's map puts it in zone X (0.2 pct annual chance flood hazard). Recorded September 29, 2026.

Request

curl -sG https://api.floodzoneapi.com/api/v1/flood/zone \
  -H "Authorization: Bearer $FZA_KEY" \
  -d lat=41.825 -d lon=-71.9907

Response 200

{
  "query": {
    "lat": 41.825,
    "lon": -71.9907
  },
  "location": {
    "lat": 41.825,
    "lon": -71.9907,
    "geocoder": null,
    "precision": "input_coordinates",
    "matched_address": null,
    "candidates": null,
    "county": null,
    "county_fips": null,
    "state": null
  },
  "flood_zone": {
    "mapped": true,
    "zone": "X",
    "subtype": "0.2 PCT ANNUAL CHANCE FLOOD HAZARD",
    "description": "0.2% annual chance flood hazard. Outside the Special Flood Hazard Area.",
    "sfha": false,
    "static_bfe": null,
    "depth": null,
    "dfirm_id": "09015C",
    "polygon_id": "09015C_32",
    "at_zone_boundary": false,
    "other_zones": []
  },
  "firm_panel": {
    "panel": "09015C0230F",
    "effective_date": "2023-09-07",
    "panel_type": "Countywide, Panel Printed",
    "dfirm_id": "09015C",
    "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": 41.825,
      "lon": -71.9907
    },
    "queried_at": "2026-09-29T08:37:33Z",
    "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 Connecticut

Dates are panel effective dates (YYYY-MM-DD). "Placeholder" means FEMA's record carries a non-date such as 9999-09-09. "Over 10 years old" counts panels effective before September 29, 2016. "LOMRs in effect" are Letters of Map Revision not yet folded into a new FIRM. The DFIRM ID appears in responses as `flood_zone.dfirm_id` and `firm_panel.dfirm_id`.
Map	DFIRM ID	ID type	Panels	Newest panel	Oldest panel	Over 10 years old	LOMRs in effect
Fairfield County	09001C	County	212	2013-10-16	2010-06-18	212	43
Hartford County	09003C	County	239	2017-05-16	2008-09-26	229	18
Middlesex County	09007C	County	127	2013-02-06	2008-08-28	127	8
New Haven County	09009C	County	227	2017-05-16	2010-12-17	173	31
New London County	09011C	County	238	2023-08-01	2011-07-18	183	6
Town of North Canaan	090149	Community-numbered	18	2008-01-02	2008-01-02	18	0
Town of Somers	090112	Community-numbered	19	2006-08-16	2006-08-16	19	1
Windham County	09015C	County	96	2023-09-07	2023-09-07	0	0

Source: FEMA NFHL layers 1, 3 and 22 and the Census Bureau county gazetteer, computed September 29, 2026. All states · API reference