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A deep well and geotechnical drilling contractor that conducts scientific geothermal observation hole drilling, testing, and plugging.
Company background: Water Resources International, Inc. (WRI) is a 65-year-old (founded 1961) Honolulu, HI heavy industrial drilling contractor. Licensed under Hawaii DCCA CT-17737 (C-57 Well Contractor, C-57a Pumps Installation, A General Engineering; RME: Eric D. Eldred). NGWA member. Historically participated in deep exploratory geothermal projects including the Hawaii Geothermal Project HGP-1 well and SOH-1/SOH-2 observation well plug-and-abandonment in Puna (2016). In March 2025, WRI was sold by Barnwell Industries (NYSE: BRN) to West Maui Construction Inc. for $1,050,000. NOTE: This is a heavy commercial/exploratory driller — they do NOT perform residential or commercial geothermal loop (GSHP) installations. No C-52 (Ventilating & AC) license held. Re-verify contact details in 12 months given ownership transition.
Service Details
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Years in Business
65 years
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License Number
CT-17737 (C-57, C-57a, A General Engineering)
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Brands Installed
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Licensed
Regulatory Context
Geothermal Permitting in Hawaii
Geothermal heat pump installations in Hawaii require specific permits and compliance with state regulations regarding well drilling, loop installation, and refrigerant handling. Contact your local building department for specific requirements in your area.
How much does geothermal installation cost in Honolulu, Hawaii?add
Geothermal heat pump installation in Honolulu typically costs between $18,000–$45,000 depending on system size, loop type (vertical vs. horizontal), lot conditions, and home square footage. Available state and utility incentives can reduce net cost (federal §25D credit ended Dec 31, 2025 under OBBBA; §48 commercial ITC may still apply). Request quotes from multiple certified installers in Hawaii to compare pricing.
Do I need a permit for geothermal drilling in Hawaii?add
Most Hawaii municipalities require permits for geothermal well drilling and ground loop installation. Requirements vary by county — some require driller licensing, environmental impact review, or water well permits. Your geothermal installer should handle the permitting process. Contact your local Honolulu building department for specific requirements.
How long does a geothermal system last in Honolulu?add
Geothermal heat pumps typically last 20–25 years for the indoor unit and 50+ years for the ground loop. In Honolulu's climate, a properly maintained system provides reliable heating and cooling with minimal degradation. Annual professional maintenance and filter changes every 3 months help maximize system lifespan.
Is my property in Honolulu suitable for geothermal?add
Most properties in Honolulu, Hawaii can support geothermal systems. Vertical loop systems require minimal land area (as little as a standard residential lot), while horizontal loops need more yard space. A qualified installer will conduct a site assessment including soil conductivity testing to determine the best loop configuration for your property.
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If you need to reach Water Resources International, Inc. directly: (808) 531-8422
Geothermal heat pump installations in Hawaii may require drilling permits, environmental site assessments, and compliance with local well and thermal energy regulations. Requirements vary by jurisdiction and system type (vertical, horizontal, open-loop). Contact your local municipality, state energy office, or a licensed geothermal installer for specific permitting requirements in your area.