California · Nonprofit
HUMBOLDT WATERKEEPER
HUMBOLDT WATERKEEPER (California) receives grants from 3 organizations whose IRS filings report $143,900 to it, the largest being RESOURCES LEGACY FUND ($75,000). 3 of them have funded it in more than one year.
- Revenue FY2025
- $182k
- Funders on record
- 3
- Grants received
- $144k
- Net assets
- $145k
What Humboldt Waterkeeper does
Mission
To safeguard coastal resources for health and economic strength through education and scientific research.
As stated on its FY2025 Form 990-EZ.
Programs
Education and Outreach: 17 bay tours for 432 participants, 3 radio shows,6 newsletter articles, 21 e-newsletters, 6 public presentations,more than 20 blog posts to our website, and quotes in numerous newspaper articles.
$28,828 spent20% of program spendingScientific Research: Mapping and researching contaminated sites at risk from rising sea level;developing a database for mapping total restoration projects; meetings withscientists, agency staff, tribes, and community members to gather input; water quality monitoring for toxic tire chemicals.
$37,300 spent26% of program spendingAdvocacy: Action alerts, meeting with decisionmakers andproject proponents, public testimony and comment letters,input on policies, ordinances, and proposed projects.
$77,882 spent54% of program spending
The 3 programs described on its FY2025 Form 990-EZ. Program spending in total: $144,010.
The organization over time
Each line starts at 100 in 2022, so what you read is the shape rather than the size: 150 means half as much again as 2022, 50 means half. The number beside each label in the key is where it ended. The shaded band is where the middle 50% of its peers' revenue would sit, given their growth.
Balance sheet
Total assets and total liabilities at each year end, in dollars. The largest one-year move in total assets was 2023 to 2024, from $67k to $126k (+89%).
How it's funded, over time
Each bar is one year's revenue split into where it came from, and every bar is the same height — these are shares, not amounts, so a year that raised twice as much looks the same size. Hover a bar for the split.
98% of HUMBOLDT WATERKEEPER’s revenue is contributions — more donation-reliant than the typical peer (88% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 1 of the last 4 reported years ran a deficit.
Leadership and staff
Chief executive
Jennifer Kalt
Board Secretary and Executive Director
Board chair
Alicia Hamann
Board President
As listed on its FY2025 Form 990-EZ.
Who funds it, year by year
2017 → 2023: the base broadened from 1 funder to 2 funders, grant income rose $1k → $27k.
1 of 3 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 44% of grant dollars received. That money is really individual donors directing a sponsor; the institutions to cultivate are the non-DAF funders.
From the IRS filings of HUMBOLDT WATERKEEPER’s funders (the co-funder graph). Association, not causation. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
How concentrated its funding is
HUMBOLDT WATERKEEPER leans on a few funders — its largest provides 52% of grant income and the top three 100%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
96% of the income these shares are computed over arrives through pass-through sponsors or from payers whose filings do not say what kind of payment it is. Concentration is still measured over all of it, because the money is real; what it does not support is a claim about how many institutions have chosen to fund HUMBOLDT WATERKEEPER.
Largest funder’s share by year: 2017 100% · 2018 100% · 2019 100% · 2020 100% · 2021 100% · 2022 91% · 2023 75% — diversifying over time.
“Effective funders” = inverse Herfindahl index (1 / Σ shareᵢ²) — the number of equal-sized funders that would give the same concentration. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Where its funders are
100% of HUMBOLDT WATERKEEPER's grant income comes from California funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $63k arriving through sponsors registered in 1 state is excluded from the map and the split above: a sponsor holds money on a donor’s behalf, so its registered address would place those dollars somewhere no donor need ever have been. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Against its field
HUMBOLDT WATERKEEPER has grown faster than three-quarters of the 2,433 environment nonprofits its size.
this organization peer median middle 50% of peers· 2,433 environment nonprofits $100k–$1M, FY2025
Organizations like HUMBOLDT WATERKEEPER
Organizations whose mission and program text most resemble this one, by semantic similarity over every organization in the US filings — the closest peers, and often the clearest route to shared or prospective funders.
In California
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Public support
0%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Screen this organization
A dated, signed PDF of the compliance screen for HUMBOLDT WATERKEEPER: IRS status (Business Master File, Publication 78, auto-revocation), the OFAC sanctions lists, the Internal Revenue Bulletin, and California registration, with the Rev. Proc. 2018-32 §8.01 reliance elements stated element by element. Generated from the current files at the moment you download it.
Screens are triage, not determinations; a source that cannot be read reports not screened, never clear. Screen this nonprofit · How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds HUMBOLDT WATERKEEPER?
- HUMBOLDT WATERKEEPER (California) receives grants from 3 organizations whose IRS filings report $143,900 to it, the largest being RESOURCES LEGACY FUND ($75,000). 3 of them have funded it in more than one year.
- How many funders does HUMBOLDT WATERKEEPER have?
- IRS filings report 3 organizations giving $143,900 in grants to HUMBOLDT WATERKEEPER, 3 of which have funded it in more than one year.
- Who is the largest funder of HUMBOLDT WATERKEEPER?
- RESOURCES LEGACY FUND is the largest funder on record, with $75,000 in grants. The full list of funders is on this page.
- How can an organization like HUMBOLDT WATERKEEPER find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in California. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
Play a game about who funds Humboldt Waterkeeper →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2022–2025), and the filings of 3 funders that report grants to it. “On record” means captured in the filings we have parsed — a funder that does not e-file, or whose grant detail is not itemized, will not appear. Filings run roughly 12–24 months behind. Trends on this page end at FY2023, the last fiscal year that has finished arriving; later years are shown and marked, and move no figure. Data on this page was exported October 14, 2026. What this page cannot tell you · view filing