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.
Be An Everday Environmental Hero
Learn how you can be an Everyday Clean Water Hero!
Latest News

Make a difference this Earth Month by
making a free, pledge online at MYWATERPLEDGE.COM to conserve water
and energy. You can win 100's of great prizes like a Toyota Prius Plug-in!

The 7th Annual Mauka to Makai Clean Water Expo will once again be at the Waikiki Aquarium on Saturday, April 19, 2014 from 9am to 2pm. Click here for more details.

April is Earth Month! Come and get involved to prevent water pollution by participating in a cleanup event in your community!

Take the World Water Monitoring Challenge training quiz. Click here for more details.
Take the CleanWaterHonolulu Pop Quiz!

Try our new Everyday Clean Water Hero pop quiz to see how much you know about storm water!
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The modules from the Storm Drainage Standards Workshops hosted by the City and County of Honolulu on April 15-18, 2013, are now available for download here.

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)
Photo Gallery   Events Calendar
Check out the fun and success of past events   See upcoming events in your area you can participate in
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