Honolulu Water Catchment and Rainwater Harvesting
Locally owned, full-service water catchment for Honolulu and surrounding communities. Based in South Kona, Kona — serving all of Hawaii.
Honolulu is Hawaii's largest city and the economic center of the Pacific, but beneath the urban surface lies a growing water challenge. The Board of Water Supply draws primarily from the Pearl Harbor aquifer and windward sources through the Koolau tunnels, but aging infrastructure, increasing demand, and drought conditions have put pressure on the municipal supply. Rainwater catchment is emerging as a practical supplement for Honolulu homeowners looking to reduce water bills, irrigate landscapes, and build resilience against supply disruptions.
Honolulu's rainfall varies enormously by neighborhood. Manoa Valley receives over 150 inches per year, making it one of the wettest urban valleys in the world, while just four miles away in Waikiki the total drops to under 20 inches. Pacific Blue Catchment designs custom systems for Honolulu properties based on actual roof area, localized rainfall data, and water use patterns — whether it is a hillside estate in Tantalus, a single-family home in Kaimuki, or a multi-unit property in Hawaii Kai.
Installing catchment systems in Honolulu's urban environment requires navigating tighter lot setbacks, HOA restrictions, and permitting requirements that do not apply on the neighbor islands. Our team handles the full process including site surveys, permit applications, and installations that meet city building codes while keeping systems visually discreet for neighborhood compatibility.
Services available in Honolulu
Pacific Blue Catchment provides complete water catchment solutions for residential and commercial properties in Honolulu and throughout Oahu.
Water Tank Installation
Certified Pioneer tank dealer. Tanks from 1,000 to 48,000 gallons, installed on prepared pads with full plumbing connections.
Rainwater Harvesting Systems
Complete roof-to-tap systems including gutters, downspouts, first-flush diverters, and collection plumbing.
Water Filtration
Multi-stage sediment, carbon, and specialty filtration to remove particulates, chemicals, and organic contaminants.
UV Water Treatment
Hospital-grade ultraviolet sterilization that eliminates 99.99% of bacteria, viruses, and parasites without chemicals.
System Maintenance
Scheduled maintenance contracts including filter changes, tank inspections, UV lamp replacement, and water quality testing.
Emergency Repair
Pump failures, leaks, broken fittings, and contamination events — we respond fast to get your water flowing again.
Fire Protection Tanks
Dedicated fire suppression water storage with quick-connect fittings for fire department access. Critical for rural properties.
Commercial Systems
Large-scale catchment for farms, ranches, businesses, and multi-unit residential. Custom engineered for high-volume applications.
Hawaii's climate demands Hawaii experience.
Salt air, volcanic conditions, heavy rainfall, and remote locations — we have built and maintained catchment systems across every microclimate the islands throw at us. 15 years of local knowledge means we know what works in Honolulu and what does not.
Location FAQ
Do you install water catchment systems on Oahu?
Yes — Pacific Blue Catchment dispatches crews from our Big Island base to Oahu for installations and major service work, including Honolulu and the surrounding districts. Call (808) 345-0335 to schedule a free site survey for any Oahu property.
Is rainwater harvesting legal in Honolulu?
Yes — rainwater catchment is fully legal in Honolulu County and across all Hawaiian islands. Standalone tanks typically don't require a building permit; plumbing connections to the dwelling are permitted through the City and County of Honolulu Department of Planning and Permitting. We handle the permitting coordination as part of every project.
How much does a water catchment system cost in Honolulu?
A complete residential catchment system in Honolulu typically runs $15,000 to $30,000 depending on tank size, filtration package, and the inter-island shipping cost from our Big Island base. We provide a written quote after a free site survey at no obligation.
Request a free quote in Honolulu.
Tell us about your project and we'll get back to you within one business day.
We got your request!
A member of our team will reach out within one business day. For anything urgent, call us at (808) 345-0335.
Ready for reliable water in Honolulu?
Join hundreds of Hawaii families who trust Pacific Blue Catchment. One call, one crew, one company.
Call (808) 345-0335 Request a Free Quote