California · Nonprofit
THREE RIVERS CHARTER SCHOOL
THREE RIVERS CHARTER SCHOOL (California) receives grants from 2 organizations whose IRS filings report $13,034 to it, the largest being COMMUNITY FOUNDATION OF MENDOCINO COUNTY ($12,500). 1 of them have funded it in more than one year, and 100% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- Revenue FY2025
- $1.5M
- Funders on record
- 2
- Grants received
- $13k
- Net assets
- $1.8M
What Three Rivers Charter School does
Mission
The mission of Three Rivers Charter School is to educate students in grades 1-8 to become well-rounded individuals with a life-long love of learning and the ability to think and act with moral integrity.
As stated on its FY2025 Form 990.
Program
Three rivers is a tuition-free, public charter school serving students in grades 1-8 in the fort bragg/mendocino area. We offer a small, family-centered learning community with multi-grade classrooms and dedicated teachers. We focus on character development through our reach goals: respect, empathy, achievement, citizenship, and hard work.
$1,207,178 spent$7,987 earned by the program100% of program spending
The program described on its FY2024 Form 990. Program spending in total: $1,207,178.
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 $1.6M to $2.5M (+56%).
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: 2017 96% · 2018 95% · 2019 95% · 2020 96% · 2021 99% · 2022 97% · 2023 97% · 2024 95% · 2025 95%. Grants only. Government contracts and fees sit inside program revenue.
98% of THREE RIVERS CHARTER SCHOOL’s revenue is contributions — more reliant on donations than three-quarters of its peers (48% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 2 of the last 9 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
2020 → 2023: the base held at 1 funder, grant income rose $106 → $174.
2 of 2 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 100% 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 THREE RIVERS CHARTER SCHOOL’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
THREE RIVERS CHARTER SCHOOL leans on a few funders — its largest provides 96% 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
100% 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 THREE RIVERS CHARTER SCHOOL.
Largest funder’s share by year: 2020 100% · 2021 100% · 2022 100% · 2023 100% — 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.
Where its funders are
100% of THREE RIVERS CHARTER SCHOOL's grant income arrives through donor-advised or pass-through sponsors, whose addresses record where the money is held rather than where the donor is. Too little is directly attributable to place on a map.
Funder states come from each funder’s own filing. $13k arriving through sponsors registered in 2 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
THREE RIVERS CHARTER SCHOOL holds deeper cash reserves than three-quarters of the 9,398 education nonprofits its size.
this organization peer median middle 50% of peers· 9,398 education nonprofits $1M–$10M, FY2025
Organizations like THREE RIVERS CHARTER SCHOOL
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.
Where the money goes
79% of spending goes to programs.
Governance
Footprint & structure
Files a return copy in 1 state
Screen this organization
A dated, signed PDF of the compliance screen for THREE RIVERS CHARTER SCHOOL: 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 THREE RIVERS CHARTER SCHOOL?
- THREE RIVERS CHARTER SCHOOL (California) receives grants from 2 organizations whose IRS filings report $13,034 to it, the largest being COMMUNITY FOUNDATION OF MENDOCINO COUNTY ($12,500). 1 of them have funded it in more than one year, and 100% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does THREE RIVERS CHARTER SCHOOL have?
- IRS filings report 2 organizations giving $13,034 in grants to THREE RIVERS CHARTER SCHOOL, 1 of which have funded it in more than one year.
- Who is the largest funder of THREE RIVERS CHARTER SCHOOL?
- COMMUNITY FOUNDATION OF MENDOCINO COUNTY is the largest funder on record, with $12,500 in grants. The full list of funders is on this page.
- How can an organization like THREE RIVERS CHARTER SCHOOL 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 Three Rivers Charter School →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2017–2025), and the filings of 2 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