Florida · Nonprofit
HOWARD T ODUM FLORIDA SPRINGS INSTITUTE
HOWARD T ODUM FLORIDA SPRINGS INSTITUTE (Florida) receives grants from 12 organizations whose IRS filings report $1,290,493 to it, the largest being FELBURN FOUNDATION ($410,000). 6 of them have funded it in more than one year.
- Revenue FY2024
- $557k
- Funders on record
- 12
- Grants received
- $1.3M
- Net assets
- $533k
What Howard T Odum Florida Springs Institute does
Mission
Florida Springs Institute provides a focal point for improving the understanding of springs ecology and fosters development of science-based education and management actions needed to restore and protect springs throughout Florida.
As stated on its FY2024 Form 990.
Programs
SCIENTIFIC RESEARCH: FSI continues data collection and analysis on the lower and middle Suwannee River and Springs, the Ichetucknee River and Springs, Rainbow River and Springs, Silver Springs, Volusia Blue Spring, Lower Santa Fe River and Springs, and Homosassa Springs. Findings were distributed through the website. A restoration action plan and executive summary for the middle Suwannee River and Springs has been completed and published for distrubution to the public, local and state leaders, and key staff of the environmental agencies. A restoration action plan and executive summary for Volusia Blue Spring has been completed and published. Restoration action plans address the current health of the water bodies and provide recommendations moving forward to improve the health of the ecosystem.
$228,639 spent$43,510 earned by the program62% of program spendingEDUCATION : FSI Conducts presentations to school children and adults on ecology, hydroecology, geology, springs problems and solutions, and state and federal water law. FSI also works with local organizations to educate local government and state leaders on issues affecting the springs so they may make informed decisions to protect the States water ressources. FSIs executive director publishes columns and op-eds in local newspapers on spring issues and conducts TV, radio, and newspaper interviews as one of the states leading experts on Springs and current trends in Springs health. FSI conducts short courses on Springs for environment professionals, students and the public. FSI published a childrens activity and coloring book entitled Aquatic Adventures: Florida Springs and Aquafer. Over 400 copies have been distributed.
$138,136 spent38% of program spending
The 2 programs described on its FY2024 Form 990, listed largest first by expense. Program spending in total: $366,775.
The organization over time
Each line starts at 100 in 2017, so what you read is the shape rather than the size: 150 means half as much again as 2017, 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 2022 to 2023, from $187k to $408k (+119%).
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.
Government-grant reliance: 2023 20% · 2024 9%. Grants only. Government contracts and fees sit inside program revenue.
90% of HOWARD T ODUM FLORIDA SPRINGS INSTITUTE’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. 2 of the last 8 reported years ran a deficit.
reserve
Leadership and staff
The officers, directors, trustees and key employees listed on each return. Joined and no longer listed compare each filing with the year before, matching people by surname and first initial; a year after a gap, or a roster under three people, has no comparison.
Who funds it, year by year
2017 → 2023: the base held at 4 funders, grant income fell $445k → $143k.
6 of 12 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 41% 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 HOWARD T ODUM FLORIDA SPRINGS INSTITUTE’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
HOWARD T ODUM FLORIDA SPRINGS INSTITUTE leans on a few funders — its largest provides 32% of grant income and the top three 88%; half comes from just 2 funders.
the vertical line marks half of all grant income — 2 funders to its left
67% 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 HOWARD T ODUM FLORIDA SPRINGS INSTITUTE.
Largest funder’s share by year: 2017 52% · 2018 92% · 2019 72% · 2020 97% · 2021 87% · 2022 61% · 2023 52% — broadly stable.
“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.
How long its funders stay
29% of HOWARD T ODUM FLORIDA SPRINGS INSTITUTE's funders are still giving 3 years after their first grant; 50% give in more than one year at all.
Share of funders still giving k years after their first recorded grant, pooled across every acquisition cohort. A funder counts as retained in a year only if it made a grant that year. Measured to FY2023, the last fiscal year that has finished arriving — a funder cannot be counted as lapsed in a year most filers have not reached.
Where its funders are
HOWARD T ODUM FLORIDA SPRINGS INSTITUTE draws 55% of its grant income from funders outside Florida, across 3 states in all.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $531k arriving through sponsors registered in 6 states 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
HOWARD T ODUM FLORIDA SPRINGS INSTITUTE runs a healthier operating margin than half of the 4,264 environment nonprofits its size.
this organization peer median middle 50% of peers· 4,264 environment nonprofits $100k–$1M, FY2024
Organizations like HOWARD T ODUM FLORIDA SPRINGS INSTITUTE
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 Florida
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
85% of spending goes to programs.
Governance
Public support
70%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 1 state
Screen this organization
A dated, signed PDF of the compliance screen for HOWARD T ODUM FLORIDA SPRINGS INSTITUTE: 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 HOWARD T ODUM FLORIDA SPRINGS INSTITUTE?
- HOWARD T ODUM FLORIDA SPRINGS INSTITUTE (Florida) receives grants from 12 organizations whose IRS filings report $1,290,493 to it, the largest being FELBURN FOUNDATION ($410,000). 6 of them have funded it in more than one year.
- How many funders does HOWARD T ODUM FLORIDA SPRINGS INSTITUTE have?
- IRS filings report 12 organizations giving $1,290,493 in grants to HOWARD T ODUM FLORIDA SPRINGS INSTITUTE, 6 of which have funded it in more than one year.
- Who is the largest funder of HOWARD T ODUM FLORIDA SPRINGS INSTITUTE?
- FELBURN FOUNDATION is the largest funder on record, with $410,000 in grants. The full list of funders is on this page.
- How can an organization like HOWARD T ODUM FLORIDA SPRINGS INSTITUTE find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Florida. 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 Howard T Odum Florida Springs Institute →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2024 (financials across 2017–2024), and the filings of 12 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