Ecological Regions: Level 1 Regions
North AmericaPhysical EnvironmentExtent of the Level I Ecological Regions of North America
EPAA map of North America shows various ecological regions, each marked with a distinct color to represent different Level 1 ecological regions.
Arctic Cordillera (Red): Found in the northernmost parts of Canada, specifically the Arctic Archipelago. Tundra (Blue): Covers large portions of northern Canada, including parts of Nunavut and the Northwest Territories, as well as coastal areas of Alaska. Taiga (Purple): Spans across central and northern Canada, covering parts of Quebec, Ontario, Manitoba, Saskatchewan, Alberta, and British Columbia. Hudson Plain (Orange): Located in the northeastern part of Canada, around the Hudson Bay area. Boreal Forests (Yellow): Encompasses large areas in Canada, south of the tundra and taiga regions, and extends into parts of Newfoundland and Labrador. Northwestern Forested Mountains (Green): Found along the western coast of Canada and the United States, covering parts of British Columbia and Alaska. Marine West Coast Forest (Brown): Occupies the coastal regions of the Pacific Northwest, including areas in British Columbia, Washington, Oregon, and northern California. Eastern Temperate Forests (Pink): Stretch from the Great Lakes region through the northeastern United States and into eastern Canada. Great Plains (Grey): Span the central United States from Canada to Texas, including parts of Alberta, Saskatchewan, Manitoba, and several central U.S. states. Deserts and Steppes (Dark Green): Found in the southwestern United States and northern Mexico, covering areas in Arizona, New Mexico, and parts of California and Nevada. Mediterranean California (Dark Pink): Specific to the coastal regions of central and southern California. Southern Semi-Arid Highlands (Gold): Located in central Mexico and parts of the southwestern United States. Temperate Sierras (Dark Brown): Found in Mexico, primarily in the Sierra Madre ranges. Tropical Dry Forests (Light Brown): Present in parts of southern Mexico and Central America. Tropical Wet Forests (Light Tan): Located in the southeastern part of Mexico and Central America, including the Yucatan Peninsula.
Arctic Cordillera | Tundra | Taiga | Hudson Plain | Boreal forests | Northwestern forested mountains | Marine west coast forest | Eastern temperate forests | Great Plains | Deserts and steppes | Mediterranean California | Southern semi-arid highlands | Temperate sierras | Tropical wet forests | No data | Arid and low water use | Low (<10%) | Low-medium (10-20%) | Medium-high (20-40%) | High (40-80%) | Extremely high (>80%) | -0.25 to 0.25 | 0.75 to 1.0 | 1.0 to 1.25 | 1.25 to 1.5 | 1.5 to 1.75 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Arizona | 66.3% | 12.9% | 19.7% | 3.34% | 9.37% | 6.97% | 0.448% | 4.52% | ||||||||||||||||||
Utah | 19.3% | 80.3% | 20.8% | 13.7% | 0.313% | 0.420% | 49.5% | |||||||||||||||||||
Yukon | 7.08% | 38.7% | 53.4% | 0.923% | 99.0% | |||||||||||||||||||||
Northwest Territories | 3.04% | 63.7% | 0.342% | 3.62% | ||||||||||||||||||||||
District of Columbia | 100% | 100% | ||||||||||||||||||||||||
Idaho | 57.3% | 40.7% | 0.772% | 13.8% | 28.4% | 8.83% | 44.9% | |||||||||||||||||||
New Hampshire | 82.5% | 17.5% | 17.2% | 33.7% | 40.5% | 8.46% | ||||||||||||||||||||
Vermont | 86.9% | 13.1% | 7.27% | 88.3% | 4.41% | |||||||||||||||||||||
Wyoming | 6.11% | 27.1% | 46.4% | 21.7% | 0.541% | 70.3% | ||||||||||||||||||||
Montana | 31.6% | 66.0% | 28.7% | 2.60% | 14.6% | 5.24% | 35.2% | |||||||||||||||||||
North Dakota | 100% | 7.38% | 3.22% | 4.45% | 0.249% | 9.67% | 36.7% | |||||||||||||||||||
Kentucky | 100% | 76.6% | 17.7% | 5.68% | ||||||||||||||||||||||
Saskatchewan | 8.06% | 57.8% | 33.4% | 4.25% | 59.9% | 2.62% | 2.54% | 2.67% | 0.868% | |||||||||||||||||
Mississippi | 99.9% | 74.5% | 1.57% | 23.9% | ||||||||||||||||||||||
West Virginia | 100% | 63.6% | 17.6% | 14.6% | ||||||||||||||||||||||
Nebraska | 100% | 0.605% | 3.54% | 22.3% | 73.5% | |||||||||||||||||||||
Missouri | 60.6% | 39.4% | 45.5% | 14.9% | 0.131% | 5.37% | ||||||||||||||||||||
Oregon | 53.3% | 14.9% | 7.11% | 14.3% | 48.2% | 11.8% | 4.82% | 0.772% | 0.847% | |||||||||||||||||
Alabama | 99.9% | 92.6% | 5.45% | 0.987% | ||||||||||||||||||||||
New Mexico | 8.59% | 32.9% | 7.36% | 1.32% | 3.54% | 30.3% | 0.128% | 7.32% | 21.7% | |||||||||||||||||
Kansas | 99.9% | 0.176% | 1.82% | 13.8% | 68.4% | |||||||||||||||||||||
Wisconsin | 31.7% | 66.5% | 1.10% | 5.67% | 25.0% | 40.8% | 9.68% | |||||||||||||||||||
South Carolina | 99.7% | 0.748% | 24.6% | 36.2% | ||||||||||||||||||||||
Michigan | 25.2% | 1.08% | 56.0% | 3.00% | 4.63% | 9.70% | ||||||||||||||||||||
Alberta | 17.4% | 54.4% | 6.61% | 21.1% | 3.52% | 56.8% | 0.267% | 4.01% | 3.67% | 11.4% | ||||||||||||||||
Connecticut | 15.9% | 84.0% | 0.460% | 29.6% | 24.9% | 23.8% | 1.35% | |||||||||||||||||||
Pennsylvania | 3.06% | 79.4% | 1.42% | 27.8% | 49.9% | 3.96% | ||||||||||||||||||||
Colorado | 38.2% | 42.1% | 2.98% | 0.795% | 9.40% | 85.2% | ||||||||||||||||||||
Nevada | 99.6% | 8.21% | 0.731% | 1.40% | 0.413% | 2.80% | 24.0% | |||||||||||||||||||
Georgia | 99.9% | 8.71% | 47.0% | 37.9% | ||||||||||||||||||||||
Québec | 1.01% | 37.0% | 2.25% | 3.73% | 1.51% | 99.1% | 0.240% | |||||||||||||||||||
Manitoba | 22.1% | 11.3% | 55.4% | 10.0% | 0.656% | 83.1% | 11.7% | 2.04% | 1.39% | |||||||||||||||||
Oklahoma | 21.6% | 78.4% | 11.4% | 5.60% | 4.28% | 17.9% | 30.0% | |||||||||||||||||||
Tennessee | 100% | 90.1% | 5.50% | |||||||||||||||||||||||
Ontario | 28.1% | 64.1% | 7.08% | 97.2% | 1.67% | 1.13% | ||||||||||||||||||||
Arkansas | 100% | 12.6% | 46.8% | 33.2% | 6.01% | |||||||||||||||||||||
South Dakota | 3.94% | 96.1% | 32.7% | 3.47% | 37.3% | 22.0% | ||||||||||||||||||||
Ohio | 99.9% | 3.42% | 0.721% | 29.0% | ||||||||||||||||||||||
Indiana | 100% | 0.434% | 1.19% | 8.61% | 4.78% | |||||||||||||||||||||
Minnesota | 40.6% | 24.1% | 35.2% | 21.0% | 3.81% | 13.1% | 23.4% | 22.0% | ||||||||||||||||||
Iowa | 6.36% | 93.6% | 26.6% | 12.5% | 44.0% | 16.3% | 0.628% | |||||||||||||||||||
Illinois | 99.9% | 30.9% | 0.187% | 44.1% | 9.75% | |||||||||||||||||||||
Alaska | 25.1% | 6.23% | 14.3% | 3.61% | 0.132% | 87.9% | 0.193% | 0.154% | 1.32% | 0.318% | ||||||||||||||||
Florida | 84.3% | 14.5% | 10.4% | 12.0% | 0.279% | 0.266% | 0.590% | 0.596% | ||||||||||||||||||
Rhode Island | 92.1% | 0.183% | 86.5% | 6.09% | 4.64% | |||||||||||||||||||||
Washington | 44.1% | 18.2% | 34.8% | 72.6% | 3.37% | 5.42% | 0.287% | 6.53% | 0.513% | |||||||||||||||||
Nunavut | 1.96% | 1.52% | 3.41% | 0.979% | 18.2% | 0.352% | ||||||||||||||||||||
Maine | 44.1% | 52.2% | 94.9% | 2.65% | 0.228% | 0.817% | 0.133% | |||||||||||||||||||
Nova Scotia | 17.5% | 6.61% | 0.182% | 80.1% | 0.847% | |||||||||||||||||||||
Virginia | 99.4% | 11.9% | 0.775% | 16.4% | 1.64% | 0.126% | ||||||||||||||||||||
Delaware | 98.4% | 0.105% | 37.7% | 61.1% | 0.762% | |||||||||||||||||||||
Prince Edward Island | 89.2% | 98.5% | 1.25% | 0.264% | ||||||||||||||||||||||
Texas | 17.3% | 4.05% | 13.1% | 4.07% | 3.41% | 2.84% | 1.94% | 22.5% | 2.71% | 0.183% | ||||||||||||||||
Louisiana | 86.4% | 12.6% | 54.5% | 20.6% | 5.75% | 0.184% | ||||||||||||||||||||
Hawaii | 7.82% | 1.74% | 1.20% | 0.113% | 0.444% | 2.10% | ||||||||||||||||||||
North Carolina | 99.2% | 0.116% | 12.2% | 54.7% | 3.14% | 0.982% | 0.319% | |||||||||||||||||||
New Brunswick | 3.19% | 95.8% | 99.5% | 0.522% | ||||||||||||||||||||||
British Columbia | 7.72% | 4.25% | 60.9% | 6.59% | 4.95% | 92.0% | 1.55% | 0.285% | 0.126% | |||||||||||||||||
Newfoundland and Labrador | 5.23% | 56.9% | 22.4% | 74.5% | 0.392% | |||||||||||||||||||||
New Jersey | 11.2% | 86.6% | 0.162% | 3.07% | 94.0% | 1.76% | 0.329% | |||||||||||||||||||
Massachusetts | 32.4% | 63.3% | 0.206% | 0.166% | 33.6% | 8.30% | 30.7% | 1.78% | ||||||||||||||||||
New York | 19.7% | 1.05% | 25.4% | 5.89% | 56.3% | 5.19% | 0.401% | 0.105% | ||||||||||||||||||
Maryland | 97.9% | 0.151% | 4.45% | 64.3% | 1.05% | 8.49% | 0.874% | |||||||||||||||||||
California | 26.9% | 2.89% | 29.8% | 39.7% | 0.688% | 12.5% | 0.232% | 17.8% | 2.26% | 1.00% | 0.110% | |||||||||||||||