Funding search · water quality and access · Hawaii
Who funds water quality and access work in Hawaii
12 funders have a record of paying for water quality and access work by Hawaii recipients: 25 grants totaling $6.2M, most recently in 2025 — mostly grantmaking charities, which often run real application cycles. The largest by matched giving are Hale Halawai Ohana O Hanalei ($5.1M), Harold Kl Castle Foundation ($267,715) and National Fish and Wildlife Foundation ($511,152).
From IRS Form 990-PF and 990 Schedule I filings, 2019–2025. Grants already paid to Hawaii recipients — evidence of what these funders back, not open calls.
Hale Halawai Ohana O HanaleiHanalei, HICharity · may take applications
8 matching grants · $5.1M · through 2025Largest: $1.4M to EAO Hawaii Inc — n. shore watershed flood mitigation
Largest: $132,715 to HAWAII CONSERVATION ALLIANCE FOUNDATION — for the next phase of the ahupuaa accelerator, a program to expand watershed-wide community management that has expanded to 46 partners statewide. [6153; pc]
National Fish and Wildlife FoundationWashington, DCCharity · may take applications
3 matching grants · $511,152 · through 2023Largest: $218,644 to HAWAII LOCAL2030 HUB — nature-based solutions for ala wai watershed
Doterra Healing Hands FoundationPleasant Grove, UTCharity · may take applications
2 matching grants · $60,000 · through 2022Largest: $30,000 to Hawaii Exemplary State Foundation — clean water & sanitation
Largest: $100,000 to LIVING PONO PROJECT — pu'u kukui watershed alapi'i project
Largest: $50,000 to NA KOA MANU CONSERVATION INC — kula watershed community alliance program for the post-fire recovery , soil stabilization and land restoration.
Kapalua Resort AssociationLahaina, HICharity · may take applications
1 matching grant · $50,000 · through 2023Largest: $50,000 to LIVING PONO PROJECT — watershed preserve
Kauai North Shore CommunityPrinceville, HICharity · may take applications
1 matching grant · $10,000 · through 2024Largest: $10,000 to REEF GUARDIANS HAWAII — water quality analys
50breakthroughs FoundationOakland, CACharity · may take applications
1 matching grant · $9,600 · through 2023Largest: $9,600 to UNIVERSITY OF HAWAII FOUNDATION — to support university of hawaii water quality program
Largest: $5,000 to UNIVERSITY OF HAWAII FOUNDATION — waianae mountain watershed partnership (bankoh 125 trees)
Largest: $2,000 to The Kohala Center — to support coastal and watershed restoration and regeneration work in west hawaii
Largest: $2,000 to NA KOA MANU CONSERVATION INC — east maui watershed fund
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Start with one paperBroader: water quality and access funders nationally · all Hawaii-based grantmakers