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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!
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Take the World Water Monitoring Challenge training quiz.
September 18th is World Water Monitoring Day, thousands of people across the world focus on water quality by testing, sharing, and protecting their local waterways. Join us locally!
For more information. Click here for more details.
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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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