Kohala Rainwater Harvesting & Water Catchment Systems
Locally owned, full-service water catchment for Kohala and surrounding communities. Based in South Kona, Kona — serving all of Hawaii.
Kohala rainwater harvesting looks completely different depending on where you are in the district. South Kohala's coastal strip — home to the Mauna Lani and Mauna Kea resort areas — receives as little as 8 inches of rain per year, making it one of the driest regions in Hawaii. A kohala water catchment system in this zone needs maximum storage capacity to bank every drop from the rare rain events that do come through. Meanwhile, upper North Kohala toward Kohala Mountain receives over 80 inches annually, with persistent cloud cover and fog drip adding moisture that never shows up in rain gauge measurements.
This extreme rainfall gradient means every kohala water catchment system we design is fundamentally different depending on your elevation and aspect. We have installed Pioneer tanks throughout the Kohala corridor, from Kawaihae harbor up through the historic plantation towns along Akoni Pule Highway. Each north kohala water tank installation is sized and configured for the specific property — coastal builds need 15,000 to 30,000 gallons of storage to bridge dry stretches, while upland properties need systems engineered to handle high-volume continuous flow without overflowing or backing up. Waimea water catchment is a natural extension of our Kohala work — the two districts share similar off-grid water challenges and we serve both as a single service area.
Kohala is also wind country — the trade winds accelerate along the coast and through the mountain saddle, carrying salt spray and red volcanic dust that can foul catchment systems fast. Our Kohala rainwater harvesting system installations incorporate corrosion-resistant components, sealed tank entries, and filtration stages designed to remove the fine iron-rich dust particles that give the region its characteristic red soil. One crew handles everything from site prep to final commissioning — no subcontractors.
Kohala Water Catchment & Rainwater Harvesting Services
Pacific Blue Catchment provides complete water catchment solutions for residential and commercial properties in Kohala and throughout Big Island.
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 kohala rainwater harvesting systems — roof-to-tap design including gutters, downspouts, first-flush diverters, and collection plumbing sized for Kohala's extreme rainfall gradient from 8 to 80+ inches annually.
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 Kohala and what does not.
Kohala Water Catchment FAQ
How does kohala rainwater harvesting work in such a dry area?
South Kohala averages as little as 8 inches of rain per year, so kohala rainwater harvesting requires oversized storage — typically 15,000 to 30,000 gallons — to bank water from the few rain events that do come. Coastal properties also supplement with water delivery during extended dry periods. Upper North Kohala receives 60–80+ inches annually and can sustain a full household on catchment alone. We size every kohala water catchment system based on your specific elevation, roof area, and household demand during a free site survey.
What size north kohala water tank do I need?
For coastal South Kohala properties, a north kohala water tank of 15,000 to 25,000 gallons is typically needed to carry through dry stretches. For upper North Kohala and Hawi-area properties with higher rainfall, 5,000 to 10,000 gallons is usually sufficient for a standard household. We calculate exact sizing based on your roof collection area and average daily water use — all covered in our free site survey at no obligation.
Do you also handle waimea water catchment?
Yes — waimea water catchment is a significant part of our work. Waimea (Kamuela) borders the Kohala district and shares similar off-grid water challenges. We install and maintain systems throughout Parker Ranch country and the surrounding upcountry subdivisions. See our Waimea service page for details specific to that area.
How much does a kohala water catchment system cost?
A complete turnkey kohala rainwater harvesting system typically runs $12,000 to $30,000 for a residential install, depending on tank size, site access, and filtration package. Coastal properties needing 20,000+ gallon storage run higher. We provide a written quote after a free site survey — no obligation. See our full cost guide for a detailed breakdown.
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