Northwest Hills Planning Region, Connecticut
Northwest Hills Planning Region covers 787 square miles of land. Below is what the Isopleth API returned at the Census Bureau's interior point for the county (41.85481, -73.22149) on 2026-10-29. The ground sits at 418 m (1,370 ft) on a 7.5° slope, the mapped soil is well drained, it is outside a mapped FEMA floodplain, the nearest 69 kV+ substation is 10.7 km (6.6 mi) away and a major road is 1.7 km (1.0 mi) away. Values describe that one point, not the whole county; look up your own address or coordinates for your site.
Sample point values
| field | value | source |
|---|---|---|
| Inside a mapped floodplain | No | FEMA_NFHL Federal Emergency Management Agency |
| Wildfire, annual frequency | 0.00012 events a year | FEMA_NRI Federal Emergency Management Agencyvintage December 2025 |
| Tornado, annual frequency | 0.014 events a year | FEMA_NRI Federal Emergency Management Agencyvintage December 2025 |
| Hail, annual frequency | 3.0 events a year | FEMA_NRI Federal Emergency Management Agencyvintage December 2025 |
| On a mapped wetland | No | USFWS_NWI U.S. Fish and Wildlife Service |
| Nearest mapped wetland | 219 m | USFWS_NWI U.S. Fish and Wildlife Service |
| Elevation | 418 m (1,370 ft) | USGS_3DEP_COG U.S. Geological Surveyvintage 3DEP 1/3 arc-second seamless DEM |
| Slope | 7.5° | USGS_3DEP_COG U.S. Geological Survey |
| Soil drainage | Well drained | USDA_SSURGO U.S. Department of Agriculturevintage SSURGO CT601 mukey 3395838 |
| Soil hydrologic group | C | USDA_SSURGO U.S. Department of Agriculturevintage SSURGO CT601 mukey 3395838 |
| Farmland class | Prime | USDA_SSURGO U.S. Department of Agriculturevintage SSURGO CT601 mukey 3395838 |
| Land use | Agriculture | USFS_LCMS USDA Forest Servicevintage USFS LCMS CONUS 2025 annual (30 m) |
| Crop or cover (CDL) | Fallow/Idle Cropland | USDA_CDL U.S. Department of Agriculturevintage USDA CDL 2025 (30 m) |
| Dominant crop, 5 years | Fallow/Idle Cropland | USDA_CDL U.S. Department of Agriculturevintage USDA CDL 2021-2025 dominant-crop mode |
| Tree canopy | 27% | USFS_NLCD_TCC USDA Forest Servicevintage USFS/MRLC NLCD Tree Canopy Cover (latest annual, 30 m) |
| On protected land (PAD-US) | Yes | PAD_US USGS Protected Areas Database of the United States (PAD-US)vintage USGS PAD-US 4.1 (Protection Mechanism Category combined layer) |
| Surface manager | Private or unknown | BLM_SMA Bureau of Land Management |
| Annual precipitation (normal) | 1,295 mm (51 in) | NOAA_NCEI_NORMALS_GRIDDED National Oceanic and Atmospheric Administrationvintage NOAA NCEI 1991-2020 gridded (nClimGrid) monthly normals v1.0, annual layers |
| Days above 32 °C a year | 2 days | NOAA_NCEI_NCLIMGRID_DAILY National Oceanic and Atmospheric Administrationvintage NOAA nClimGrid-Daily v1.0 (scaled), 1991-2020 mean annual day counts |
| Solar resource (GHI) | 3.88 kWh/m²/day | JRC_PVGIS_NSRDB See source_url |
| Mean wind speed at 100 m | 8.2 m/s | NREL_WIND_TOOLKIT NREL WIND Toolkit (Draxl et al., 2015)vintage NREL WIND Toolkit CONUS v1.0.0, 2007-2013 (5-min, 2 km) |
| Wind capacity factor | 41% | NREL_REV_LANDBASED_WIND_SC_2024 NREL reV supply curves, Open Energy Data Initiative (OEDI)vintage NREL reV land-based wind SC 2024 (Open access) |
| Nearest transmission line | 1.6 km (1.0 mi) | EIA_ATLAS U.S. Energy Information Administration |
| Nearest substation (69 kV+) | 10.7 km (6.6 mi) | EIA_POWER U.S. Energy Information Administration |
| Nearest gas pipeline | 15.0 km (9.3 mi) | EIA_ATLAS U.S. Energy Information Administration |
| Electric utility | CONNECTICUT LIGHT & POWER CO | EIA_POWER U.S. Energy Information Administrationvintage HIFLD Electric Retail Service Territories |
| In a public water service area | No | EPA_CWS_SERVICE_AREAS U.S. Environmental Protection Agencyvintage V3.0 (2026-03-17) |
| Depth to water, nearest monitored well | 11.9 m (39 ft) | USGS_NWIS_OGC U.S. Geological Surveyvintage USGS Water Data discrete groundwater-level field measurements (latest per well) |
| Nearest major road | 1.7 km (1.0 mi) | OVERTURE_TRANSPORTATION © Overture Maps Foundation, © OpenStreetMap contributorsvintage 2026-10-21.0 |
| Nearest fire station | 3.2 km (2.0 mi) | OVERTURE_PLACES © Overture Maps Foundationvintage 2026-10-21.0 |
| Nearest hospital | 9.3 km (5.8 mi) | OVERTURE_PLACES © Overture Maps Foundationvintage 2026-10-21.0 |
| Nearest school | 2.2 km (1.4 mi) | OVERTURE_PLACES © Overture Maps Foundationvintage 2026-10-21.0 |
| In an Opportunity Zone | No | HUD_OPPORTUNITY_ZONES U.S. Department of Housing and Urban Development |
Fields with no data at this point are left out. See the field catalog for all 351 fields.
Parcels
Parcel records: 1,320,655 parcels in 9 counties. Northwest Hills Planning Region has 63,255 of them. Published by CT GIS Office / Office of Policy and Management; 169 municipalities (Public, attribution); 2026 parcel + CAMA collection, refreshed annual.
Share of parcels with each column filled: owner name 98%, site address 98%, total value 97%, land use 96%, sale date 58%, zoning 94%, year built 87%.
The parcel under the sample point is 630.3 acres, land use “State Land Res”; its public record includes owner name, site address, mailing address, total value, land value, sale price, zoning, land-use code. parcel_enrich returns that record for any parcel you ask about, and parcel_search finds parcels by acreage, land use or value.
Look up your own site
curl https://api.isopleth.dev/v1/fetch -H "Authorization: Bearer $ISOPLETH_KEY" \
-H "Content-Type: application/json" \
-d '{"lat": 41.854809, "lng": -73.221494, "preset": "site_selection"}'
Or ask your assistant through the MCP server: “Using Isopleth, check flood zone, wetlands, soils and distance to power for [your address in Northwest Hills Planning Region, Connecticut].”
Buying land here? Check the Land’s Northwest Hills Planning Region page shows what its $29 report checks, built on these same Isopleth fields.
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