Washington, D.C. · Nonprofit
OpenAQ Inc
OpenAQ Inc (Washington, D.C.) receives grants from 10 organizations whose IRS filings report $1,309,134 to it, the largest being CLIMATEWORKS FOUNDATION ($400,000). 7 of them have funded it in more than one year.
- Revenue FY2025
- $748k
- Funders on record
- 10
- Grants received
- $1.3M
- Net assets
- $543k
What OpenAQ Inc does
Mission
By providing universal access to air quality data, OpenAQ empowers a global community of changemakers to solve air inequality.
As stated on its FY2025 Form 990.
Programs
Air Quality Data Platform: To meet the needs of air quality researchers, community advocates, journalists and other air quality changemakers, OpenAQ provides the worlds largest open-access, open-source air quality data platform. In 2025, we aggregated new data from ~3,400 locations, including ~1,400 locations in low- and middle-income countries, reaching a total of more than 22,000 locations in 141 countries. We saw a 187% increase in registered users, totaling more than 19,000. Active API use leaped by 550% to 2,700 per quarter and active OpenAQ Explorer use increased by 34% to 250 per day. ~175 publications cited their use of OpenAQ, an average of over 14 per month.
$340,729 spent$121,479 earned by the program63% of program spendingCommunity Engagement: Through webinars, trainings, speaking engagements, conference attendance, one-on-one meetings, impact stories and more, we introduced potential new users to the OpenAQ data platform and supported existing data practitioners. Through our Clean Air Community Ambassador program, we provided professional leadership training to 10 emerging air quality leaders from the world's most polluted regions. We connected air quality data producers and users across sectors and geographies to support an international learning environment. These and other outreach activities have resulted in greater use of the platform for air quality analysis and clean air advocacy.
$198,314 spentof which $29,110 as grants$19,921 earned by the program37% of program spending
The 2 programs described on its FY2025 Form 990, listed largest first by expense. Program spending in total: $539,043.
The organization over time
Each line starts at 100 in 2018, so what you read is the shape rather than the size: 150 means half as much again as 2018, 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 2019 to 2020, from $277k to $626k (+126%).
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: 2021 5%. Grants only. Government contracts and fees sit inside program revenue.
79% of OpenAQ Inc’s revenue is contributions — about as donation-reliant as 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.
Chief executive
Christine Hagerbaumer
CEO
Board chair
Pallavi Pant
Chairman
As listed on its FY2025 Form 990.
The chief executive listed changed between the FY2021 and FY2022 filings.
Who funds it, year by year
2018 → 2023: the base broadened from 1 funder to 4 funders, grant income fell $100k → $66k.
3 of 10 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 11% 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 OpenAQ 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
OpenAQ Inc leans on a few funders — its largest provides 31% of grant income and the top three 74%; half comes from just 2 funders.
the vertical line marks half of all grant income — 2 funders to its left
97% 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 OpenAQ Inc.
Largest funder’s share by year: 2018 100% · 2019 60% · 2020 47% · 2021 67% · 2022 47% · 2023 40% — 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
50% of OpenAQ Inc's funders are still giving 3 years after their first grant; 70% 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
OpenAQ Inc draws 88% of its grant income from funders outside Washington, D.C., across 5 states in all.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $142k arriving through sponsors registered in 3 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
OpenAQ Inc 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
Government funding OpenAQ Inc receives
Grants and contracts to this organization from federal (USASpending) and state checkbooks, reconciled to its EIN. $705 on record.
- OTHER SERVICES$705
Federal grants vs contracts are distinguished; state line items keep their reported category. Matched by name + geography (the BMF), so coverage is partial and precision-first.
Organizations like OpenAQ 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 Washington, D.C.
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
79% of spending goes to programs.
Governance
Public support
20%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 3 states
Screen this organization
A dated, signed PDF of the compliance screen for OpenAQ 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 OpenAQ Inc?
- OpenAQ Inc (Washington, D.C.) receives grants from 10 organizations whose IRS filings report $1,309,134 to it, the largest being CLIMATEWORKS FOUNDATION ($400,000). 7 of them have funded it in more than one year.
- How many funders does OpenAQ Inc have?
- IRS filings report 10 organizations giving $1,309,134 in grants to OpenAQ Inc, 7 of which have funded it in more than one year.
- Who is the largest funder of OpenAQ Inc?
- CLIMATEWORKS FOUNDATION is the largest funder on record, with $400,000 in grants. The full list of funders is on this page.
- How can an organization like OpenAQ Inc find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Washington, D.C.. 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 OpenAQ →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2018–2025), and the filings of 10 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