PSC B502: Air Quality Analysis
Service code
Code facts
- Spend category
- Professional Services Management Advisory Services
- Part of
-
-
B
- B5
-
B
- Contract awards
- 29 In the last 12 months
- Contract obligations
- $9,279,608 In FY2025
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 | $104,530 |
| FY2026 | $9,996,822 |
| FY2025 | $9,279,608 |
| FY2024 | $11,024,482 |
| FY2023 | $10,860,285 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | University Of California, Davis | $2,722,726 | |
| 2 | General Dynamics Information Technology, Inc. | $2,178,924 | |
| 3 | Air Resource Specialists, Inc. | $1,891,133 | |
| 4 | Nevada System Of Higher Education | $773,310 | |
| 5 | H & L Environmental Services, LLC | $743,606 | |
| 6 | Research Triangle Institute | $420,075 | |
| 7 | ERO Resources Corporation | $305,220 | |
| 8 | Trine Environmental Inc. | $295,948 | |
| 9 | WSP USA Environment & Infrastructure Inc. | $252,707 | |
| 10 | Ultrapure Air, LLC | $150,000 |
See the full FY2025 ranking of PSC B502 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of the Interior | $6,257,257 | |
| 2 | Environmental Protection Agency | $2,279,889 | |
| 3 | Air Force | $743,606 | |
| 4 | Department of Veterans Affairs | $393,293 | |
| 5 | Department of Commerce | $150,000 | |
| 6 | Department of the Army | $65,359 | |
| 7 | Defense Health Agency | $58,493 | |
| 8 | National Archives and Records Administration | $48,808 | |
| 9 | Department of the Treasury | $42,777 | |
| 10 | Department of Transportation | $40,250 |
Top NAICS codes by obligations
| Rank | NAICS code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 541380 Testing Laboratories and Services | $4,274,956 | |
| 2 | 541613 Marketing Consulting Services | $2,178,924 | |
| 3 | 541620 Environmental Consulting Services | $2,132,221 | |
| 4 | 562910 Remediation Services | $1,011,047 | |
| 5 | 115310 Support Activities for Forestry | $305,220 | |
| 6 | 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | $150,000 | |
| 7 | 541720 Research and Development in the Social Sciences and Humanities | $52,602 | |
| 8 | 334516 Analytical Laboratory Instrument Manufacturing | $38,466 | |
| 9 | 541690 Other Scientific and Technical Consulting Services | $2,112 | |
| 10 | 924110 Administration of Air and Water Resource and Solid Waste Management Programs | $1,304 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | California | $2,732,427 | |
| 2 | District of Columbia | $2,196,100 | |
| 3 | Colorado | $1,913,282 | |
| 4 | Nevada | $769,638 | |
| 5 | Georgia | $743,606 | |
| 6 | North Carolina | $439,847 | |
| 7 | New York | $338,494 | |
| 8 | Montana | $305,220 | |
| 9 | Pennsylvania | $285,161 | |
| 10 | Texas | $58,493 | |
| 11 | Maryland | $50,920 | |
| 12 | Illinois | $42,777 | |
| 13 | Delaware | $14,125 | |
| 14 | Ohio | $14,000 | |
| 15 | Oklahoma | $12,757 | |
| 16 | Indiana | $12,368 |
Show all 16
Shares are of everything obligated under PSC B502 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 38 more
Latest 48 of 173 listed here. See the rest on GovTribe.
Quick answers
What is PSC B502?
PSC B502 is Air Quality Analysis, a service code in PSC B, Special Studies/
How much do federal agencies spend under PSC B502?
Federal contracts under PSC B502 obligated $9,279,608 in fiscal year 2025 and $41,265,727 in fiscal years 2023 through 2027.
Who are the largest contractors under PSC B502?
The contractors with the most obligated under PSC B502 in fiscal years 2026 and 2027 are University Of California, Davis ($2,722,726); General Dynamics Information Technology, Inc. ($2,178,924); and Air Resource Specialists, Inc. ($1,891,133).
Which agencies buy the most under PSC B502?
The agencies that obligated the most under PSC B502 in fiscal years 2026 and 2027 are Department of the Interior ($6,257,257), Environmental Protection Agency ($2,279,889) and Air Force ($743,606).
Which NAICS codes are used with PSC B502?
The NAICS codes with the most obligated under PSC B502 in fiscal years 2026 and 2027 are 541380 Testing Laboratories and Services, 541613 Marketing Consulting Services and 541620 Environmental Consulting Services.
Where is the work under PSC B502 performed?
By place of performance, the states with the most contract obligations under PSC B502 over the last 12 months are California ($2,732,427), the District of Columbia ($2,196,100) and Colorado ($1,913,282).
What is the latest contract opportunity under PSC B502?
The latest contract opportunity under PSC B502 is Dust Hazard Analysis, solicitation from Naval Supply Systems Command (Navy), posted September 1, 2026.
On GovTribe
See everything under PSC B502
- Federal contract opportunities, awards and IDVs under this code
- Funding analysis by contractor, agency and set-aside
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