Hawaii Stormwater-General regulations & environmental compliance analysis

Hawaii Stormwater-General: What you need to know

Governing Law and Regulations

National pollutant discharge elimination system (NPDES) permit program: Hawaii Administrative Rule (HAR) 11-55-15 General permit for discharges of stormwater associated with industrial activities: HAR 11-55 Appendix B General permit for discharges of stormwater associated with construction activity: HAR 11-55 Appendix C

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General permit for discharges and certain nonstormwater discharges associated with small municipal separate storm sewer systems (MS4s): HAR 11-55 Appendix K

Regulatory Agency

Hawaii Department of Health (DOH) Clean Water Branch (CWB)

See ADDRESSES & CONTACTS for addresses and telephone numbers.

Comparison: State vs. Federal

· Rules. Hawaii is fully authorized by the U.S. Environmental Protection Agency (EPA) to administer the National Pollutant Discharge Elimination System (NPDES) permit program for stormwater discharges. The state’s NPDES general permits regulate stormwater associated with industrial activity, stormwater associated with construction activity, and stormwater associated with municipal separate storm sewer systems (MS4s).

See the national section STORMWATER—GENERAL for more information on the federal program, and the state sections STORMWATER—INDUSTRIAL FACILITIES, STORMWATER—CONSTRUCTION ACTIVITIES and STORMWATER—MUNICIPALITIES for information on the state requirements for these specific types of stormwater discharges.

· Administration and enforcement. The DOH has primary responsibility for administering the NPDES stormwater permit program in Hawaii. In addition to the state and federal requirements, some municipalities also have local requirements for stormwater discharges.

Note: Hawaii's NPDES General Permits expired on October 21, 2012. The DOH is ...


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