40 CFR Part 122, Appendix E EPA Administered Permit Programs: the National Pollutant Discharge Elimination System

Appendix E to Part 122—Rainfall Zones of the United States

Current through Aug 22, 2025 · Read all of Part 122

⚠ 1 pending change to Part 122

Not Shown: Alaska (Zone 7); Hawaii (Zone 7); Northern Mariana Islands (Zone 7); Guam (Zone 7); American Samoa (Zone 7); Trust Territory of the Pacific Islands (Zone 7); Puerto Rico (Zone 3) Virgin Islands (Zone 3).

Source: Methodology for Analysis of Detention Basins for Control of Urban Runoff Quality, prepared for U.S. Environmental Protection Agency, Office of Water, Nonpoint Source Division, Washington, DC, 1986.

[55 FR 48073, Nov. 16, 1990]

← Appendix D to Part 122—NPDES Permit Application Testing Requirements (§ 122.21)Appendix F to Part 122—Incorporated Places With Populations Greater Than 250,000 According to the 1990 Decennial Census by the Bureau of the Census →