Funding search · water resources · Hawaii
Who funds water resources work in Hawaii
9 funders have a record of paying for water resources work by Hawaii recipients: 19 grants totaling $6.0M, most recently in 2025 — mostly private foundations, plus grantmaking charities. The largest by matched giving are Hale Halawai Ohana O Hanalei ($5.1M), National Fish and Wildlife Foundation ($511,152) and Harold Kl Castle Foundation ($167,715).
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
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
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]
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
Largest: $5,000 to UNIVERSITY OF HAWAII FOUNDATION — waianae mountain watershed partnership (bankoh 125 trees)
Largest: $2,000 to NA KOA MANU CONSERVATION INC — east maui watershed fund
Largest: $2,000 to The Kohala Center — to support coastal and watershed restoration and regeneration work in west hawaii
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Start with one paperBroader: water resources funders nationally · all Hawaii-based grantmakers