City and County of Honolulu's Storm Water Management Program
Be An Everday Environmental Hero
What is stormwater? Learn more about stormwater, storm drain systems and pollution.
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Latest News

We are hosting the biannual Environmental Hero and Good Neighbor Awards Ceremony in January, 2015
As we usher in a new year, the City and County of Honolulu would like to thank the thousands of volunteers who work together to protect our waters by keeping our streams and neighborhoods clean, and marking storm drains with ‘No Dumping Drains to Ocean’ reminders. We’d like to give a special mahalo to three of our outstanding volunteer leaders that continue to inspire us. For more information on our volunteer programs visit our Get Involved page.
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Take the CleanWaterHonolulu Pop Quiz!

Try our new Everyday Clean Water Hero pop quiz to see how much you know about storm water!
Frequently Read Documents
NPDES Permit No. HI S000002 issued on May 24, 2011 (PDF 4.0MB)
Final Storm Water Management Program Plan
Rules Relating to Storm Drainage Standards, effective June 1, 2013.
Best Management Practices (BMP) Manual for Construction Sites (PDF 7.4MB)
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