PSC AH91: R&D – Environmental Protection: Other (Basic Research)
Service code
Code facts
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PSC codes and definitions come from the GSA PSC Manual and contract spending from SAM.gov/FPDS.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $0 |
| FY2026 | -$180,117 |
| FY2025 | -$629,074 |
| FY2024 | $3,897,999 |
| FY2023 | $11,956,685 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Towson University | $24,437 | |
| 2 | The Boeing Company | $15,845 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Maryland | $24,437 | |
| 2 | California | $15,845 |
Contract opportunities
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Quick answers
What is PSC AH91?
PSC AH91 is R&D – Environmental Protection: Other (Basic Research), a service code in PSC A, Research and Development.
How much do federal agencies spend under PSC AH91?
Federal contracts under PSC AH91 obligated $15,045,493 in fiscal years 2023 through 2027.
Who are the largest contractors under PSC AH91?
The contractors with the most obligated under PSC AH91 in fiscal years 2026 and 2027 are Towson University ($24,437) and The Boeing Company ($15,845).
Where is the work under PSC AH91 performed?
By place of performance, the states with the most contract obligations under PSC AH91 over the last 12 months are Maryland ($24,437) and California ($15,845).
What is the latest contract opportunity under PSC AH91?
The latest contract opportunity under PSC AH91 is Validation of a UV/
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