U.S. Requirements: Non-Attainment Areas

Extreme 10 10  -  -  - 0 0  -  -  -
Severe 25 25  -  -  - 25 25  -  -  -
Serious 50 50 50 70  - 25 25 100 15  -
Moderate 100 100 100 100  - 40 40 100 15  -
Marginal 100 100  -  -  - 40 40  -  -  -
Ozone Transport Region 100 50  -  -  -  -  -  -  -  -
3 "Dual Source" definition is strictest interpretation of "Major Modification". Both Facility and Project are evaluated as "stationary sources". Although, a facility may not increase net emissions, NSR may apply if Project emissions exceed Major Source Threshold.
1. International Parks
2. National Wilderness Areas > 5,000 acres
3. National Memorial Parks > 5,000 Acres
4. National Parks > 6,000 Acres

Note: This is meant to represent a general review of permitting requirements. A qualified consultant should be contacted before proceeding with permitting.