Connecticut · Nonprofit
SUSTAINABLE CT INC
SUSTAINABLE CT INC (Connecticut) receives grants from 12 organizations whose IRS filings report $5,947,934 to it, the largest being THE EMILY HALL TREMAINE FOUNDATION INC ($2,633,969). 5 of them have funded it in more than one year.
- Revenue FY2025
- $1.8M
- Funders on record
- 12
- Grants received
- $5.9M
- Net assets
- $2.9M
What Sustainable Ct Inc does
Mission
To inspire, support, and certify sustainability actions by connecticut towns and cities.
As stated on its FY2025 Form 990.
Programs
Sustainable ct provides connecticut municipalities with: a menu of coordinated, voluntary actions, to continually become more sustainable; resources and tools to assist municipalities in implementing sustainability actions and advancing thier programs for the benefit of all residents; and opportunities for certification to recognize municipalities for their ongoing sustainability achievements. As of december 2025, 139 municipalities (comprising over 91% of the state's population) were registered for sustainable ct, 95 municipalities had earned bronze, silver, or gold certifications (representing nearly 60% of the state's municipalities), and 23 municipalities had earned the climate leader designation on top of standard certification. Collectively, these communities have successfully implemented solutions that build thriving local economies, inclusive and equitable community connections, healthy and diverse housing options, clean transportation systems, vibrant and creative cultural ecosystems, efficient and resilient infrastructure, well-stewarded land and natural resources, forward-thinking land use practices, and inclusive public services. Registered and certified communities…
$450,401 spent$6,775 earned by the program63% of program spendingSustainable ct's community match fund has supported over 391 community-led sustainability projects in communities throughout the state with dollar- for-dollar matching funds. These projects include community gardens, bike fix-up job training programs, energy efficient campaigns, outdoor classrooms, dance and arts programs, pollinator pathways, green jobs programs for youth, tree plantings, food composting programs, sustainability discussion series and events, and public murals and art.
$266,998 spentof which $266,998 as grants37% of program spending
The 2 programs described on its FY2025 Form 990, listed largest first by expense. Program spending in total: $717,399.
The organization over time
Each line starts at 100 in 2019, so what you read is the shape rather than the size: 150 means half as much again as 2019, 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 2024 to 2025, from $2.3M to $3.0M (+31%).
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.
100% of SUSTAINABLE CT INC’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. 1 of the last 7 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
2018 → 2023: the base broadened from 1 funder to 4 funders, grant income rose $90k → $1.2M.
6 of 12 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 4% 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 SUSTAINABLE CT INC’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
SUSTAINABLE CT INC leans on a few funders — its largest provides 44% of grant income and the top three 96%; half comes from just 2 funders.
the vertical line marks half of all grant income — 2 funders to its left
Largest funder’s share by year: 2018 100% · 2019 75% · 2020 44% · 2021 53% · 2022 43% · 2023 48% — 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.
How long its funders stay
67% of SUSTAINABLE CT INC's funders are still giving 3 years after their first grant; 42% 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
58% of SUSTAINABLE CT INC's grant income comes from Connecticut funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $211k 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
SUSTAINABLE CT INC runs a healthier operating margin than three-quarters of the 9,615 education nonprofits its size.
this organization peer median middle 50% of peers· 9,615 education nonprofits $1M–$10M, FY2025
Organizations like SUSTAINABLE CT INC
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 Connecticut
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
65% of spending goes to programs.
Governance
Public support
43%
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 SUSTAINABLE CT INC: 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 SUSTAINABLE CT INC?
- SUSTAINABLE CT INC (Connecticut) receives grants from 12 organizations whose IRS filings report $5,947,934 to it, the largest being THE EMILY HALL TREMAINE FOUNDATION INC ($2,633,969). 5 of them have funded it in more than one year.
- How many funders does SUSTAINABLE CT INC have?
- IRS filings report 12 organizations giving $5,947,934 in grants to SUSTAINABLE CT INC, 5 of which have funded it in more than one year.
- Who is the largest funder of SUSTAINABLE CT INC?
- THE EMILY HALL TREMAINE FOUNDATION INC is the largest funder on record, with $2,633,969 in grants. The full list of funders is on this page.
- How can an organization like SUSTAINABLE CT INC find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Connecticut. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2019–2025), 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 22, 2026. What this page cannot tell you · view filing