Top 37 Contractors in PSC F101: Air Quality Support Services, FY2023

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency)	$7,184,441	33.0%	Rank history: #1 in FY2021, #2 in FY2022, #1 in FY2024 and #7 in FY2025; up 1 since FY2022.
2	Research Triangle Institute Top agencies EPA (Environmental Protection Agency)	$7,136,512	32.7%	Rank history: #2 in FY2021, #1 in FY2022, #2 in FY2024 and #1 in FY2025; down 1 since FY2022.
3	University of North Carolina at Chapel Hill Top agencies EPA (Environmental Protection Agency)	$2,527,713	11.6%	Rank history: #3 in FY2021, #5 in FY2022, #3 in FY2024 and #2 in FY2025; up 2 since FY2022.
4	Wilbur Technical Services LLC 2 awardees Top agencies DOS (Department of State)	$1,504,300	6.9%	Rank history: #12 in FY2021, #4 in FY2022, #4 in FY2024 and #8 in FY2025; unchanged since FY2022.
5	American Testing, Inc. Top agencies HHS (Department of Health and Human Services)	$249,867	1.1%	Rank history: #4 in FY2021, #7 in FY2022, #5 in FY2024 and #6 in FY2025; up 2 since FY2022.
6	Bluestone Interspec JV, LLC Top agencies Navy (Department of the Navy)	$233,190	1.1%	Rank history: not on the FY2021–FY2022 lists, #8 in FY2024 and #5 in FY2025; new.
7	Teya Enterprises LLC Top agencies Navy (Department of the Navy)	$200,758	0.9%	Rank history: not on the FY2021 list, #10 in FY2022, #10 in FY2024 and #10 in FY2025; up 3 since FY2022.
8	General Dynamics Information Technology, Inc. Top agencies EPA (Environmental Protection Agency)	$181,818	0.8%	Rank history: not on the FY2021 list, #3 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
9	Renova Environmental Company Top agencies Navy (Department of the Navy)	$173,910	0.8%	Rank history: #34 in FY2021, #6 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
10	Air Resource Specialists, Inc. Top agencies EPA (Environmental Protection Agency)	$169,359	0.8%	Rank history: #7 in FY2021, #9 in FY2022, #20 in FY2024 and #11 in FY2025; down 1 since FY2022.
11	Sol Solutions, LLC Top agencies Army (Department of the Army)	$159,065	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
12	Ridelinks Inc. Top agencies VA (Department of Veterans Affairs)	$148,902	0.7%	Rank history: #13 in FY2021, #11 in FY2022, #11 in FY2024 and #21 in FY2025; down 1 since FY2022.
13	B2 Constructors, LLC Top agencies VA (Department of Veterans Affairs)	$101,626	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
14	Environmental Science Corporation Top agencies Navy (Department of the Navy)	$89,538	0.4%	Rank history: #9 in FY2021, not on the FY2022 list, not on the FY2024 list and #13 in FY2025; returned.
15	Intex Environmental Group, Inc. Top agencies Army (Department of the Army)	$89,446	0.4%	Rank history: #14 in FY2021, #31 in FY2022 and not on the FY2024–FY2025 lists; up 16 since FY2022.
16	Ghdsystems LLC Top agencies DOI (Department of the Interior)	$85,925	0.4%	Rank history: not on the FY2021 list, #13 in FY2022, not on the FY2024 list and #18 in FY2025; down 3 since FY2022.
17	Montana Dept. of Public Health Through Montana Department of Environmental Quality Top agencies USDA (Department of Agriculture)	$78,272	0.4%	Rank history: #16 in FY2021, #29 in FY2022 and not on the FY2024–FY2025 lists; up 12 since FY2022.
18	Pacific Coast Contracting Group Top agencies VA (Department of Veterans Affairs)	$55,250	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
19	Bluestone - Burns & Mcdonnell JV Top agencies DHS (Department of Homeland Security)	$51,117	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
20	Purpleair, Inc. Top agencies EPA (Environmental Protection Agency)	$50,905	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
21	Thermo Electron Corporation Through Thermo Environmental Instruments LLC Top agencies EPA (Environmental Protection Agency)	$48,305	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
22	Green 2 Green Consulting LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$36,036	0.2%	Rank history: #31 in FY2021, #25 in FY2022, #21 in FY2024 and #30 in FY2025; up 3 since FY2022.
23	Orion Demolition & Environmental Services LLC Top agencies DOT (Department of Transportation)	$33,313	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
24	Kane Environmental Inc Top agencies Navy (Department of the Navy)	$32,146	0.1%	Rank history: not on the FY2021–FY2022 lists, #18 in FY2024 and #20 in FY2025; new.
25	Grace Consulting, Inc. Top agencies GSA (General Services Administration)	$31,560	0.1%	Rank history: not on the FY2021 list, #20 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
26	Caldaia Controls LLC Top agencies VA (Department of Veterans Affairs)	$29,500	0.1%	Rank history: not on the FY2021–FY2022 lists, #22 in FY2024 and not on the FY2025 list; new.
27	Corrections Colorado Department of Through Colorado Department of Public Health & Environment Top agencies DOI (Department of the Interior)	$27,310	0.1%	Rank history: #10 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
28	Iveco SUD-West Nutzfahrzeuge GMBH Through Ati, Inc. Top agencies Treasury (Department of the Treasury)	$27,039	0.1%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2024 and not on the FY2025 list; new.
29	Ess Instruments, Inc. Top agencies DOS (Department of State)	$26,732	0.1%	Rank history: not on the FY2021–FY2022 lists, #23 in FY2024 and not on the FY2025 list; new.
30	Radon Testing Services, LLC Top agencies VA (Department of Veterans Affairs)	$16,475	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
31	Logis-Tech, LLC Top agencies Army (Department of the Army)	$16,349	0.1%	Rank history: #15 in FY2021, #19 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
32	Criterion Laboratories Inc. Top agencies VA (Department of Veterans Affairs)	$13,901	0.1%	Rank history: not on the FY2021 list, #15 in FY2022, not on the FY2024 list and #28 in FY2025; down 17 since FY2022.
33	Gryphon Investors Inc. Through Trinity Consultants Inc. Top agencies GSA (General Services Administration) DOJ (Department of Justice)	$12,500	0.1%	Rank history: #37 in FY2021, #35 in FY2022, #34 in FY2024 and not on the FY2025 list; up 2 since FY2022.
34	Environmental Group Services Ltd Top agencies GSA (General Services Administration)	$10,000	<0.1%	Rank history: not on the FY2021–FY2022 lists, #32 in FY2024 and not on the FY2025 list; new.
35	Geotic Solutions LLC Top agencies DOT (Department of Transportation)	$4,000	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
36	Sitex, Inc. Top agencies VA (Department of Veterans Affairs)	$3,850	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
37	Atlantic Testing Laboratories, Limited Top agencies DOT (Department of Transportation)	$2,355	<0.1%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2024 and not on the FY2025 list; new.

How this ranking works

• Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
• Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $21.8 million obligated before deobligations, so they never pass 100%.
• Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
• Fiscal year 2023 ran Oct 1, 2022 – Sep 30, 2023. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
• Rank changes compare with FY2022. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
• Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2022 takes the color of the rank change beside it.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers