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Follow the Drop
Resources
Developing community-based green stormwater solutions for a resilient Ala Wai Watershed
Follow the Drop Maps
Prioritization Maps
Rainwater Catchment
In the Mauka Lower & Makai Neighborhoods of the Ala Wai Watershed, the implementation of rainwater catchment systems, such as rain barrels or cisterns, will be the most effective method for capturing rainwater.
Retention & Recharge
When considering the Ala Wai Watershed as a whole, particularly in the Mauka Neighborhoods, the most effective Green Stormwater Infrastructure consists of systems that directly recharge underground aquifers, such as rain gardens, bioswales, and vegetative filters.
Flow Maps
Mauka Upper Neighborhoods
Mauka Lower Neighborhoods
Makai Neighborhoods
Tools & Resources
Resources
Here are some great resources to help homeowners reduce flooding and brown water runoff into our ocean.
Follow the Drop App Demo Video
Try it yourself
Try Follow the Drop for free on iPad/iPhone or Android devices. After downloading, register an account with Account ID HGG
Did you know?
Honolulu Board of Water Supply offers $40 rebates for rain barrels! Learn more and see participating retailers here.
Coming 2025
Price Calculator
Rain Garden and Permeable Pavement price estimate calculator.
media Gallery
Check your eligibility
See if your property is located in the Ala Wai Watershed in the Google Map below and qualifies for a free rainwater assessment.
The Hawaiʻi Green Growth Local2030 Hub is a public-private partnership committed to advancing economic, social and environmental goals. The hub highlights islands as leaders in innovation, providing a holistic approach to solutions grounded in a legacy of systems thinking.
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