HNL Storm Water Program


Plans relating to the HNL Small MS4 NPDES Permit HI S000005 will be posted here for public review and comment for at least 30 calendar days prior to implementation.  Please send any comments to the DOTA via email to

  • None at this time

Spills and Illicit Discharge Reporting

Please report any illicit discharges, illegal connections, or other environmental violations to Airport Environmental Health Specialists at (808) 838-8002 and/or Airport Emergency Services at (808) 836-6670.

National Pollutant Discharge Elimination System (NPDES) Permit


HNL SWMPP (Storm Water Management Program Plan)

The SWMPP has been developed to assist all those parties conducting operations on HNL with meeting the requirements detailed in the NPDES Permit.


Airport Maps

Bodies of Water (PDF 477.3Kb)
Honolulu International Airport Municipal Separate Storm Sewer map. (4 MB) Please note that the map may be periodically updated.


Extended Education and Outreach Program

Fact Sheet: Illicit Discharges & Illegal Connections (352KB)
Fertilizer Use Brochure (188KB)
Storm Water Activity Book (1.05MB)
Hazardous Materials and Waste Disposal Brochure (303KB)
2017 HNL Baseyard Environmental Factsheet (1.94MB)


Useful Links

Department of Health – Clean Water Branch
United States Environmental Protection Agency

City & County of Honolulu Department of Environmental Services
State of Hawaii Department of Transportation Storm Water Management
State of Hawaii Department of Transportation Harbors Division Storm Water Mangement 

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