Top 39 Contractors in PSC F101: Air Quality Support Services, FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency)	$3,599,996	30.4%	Rank history: #2 in FY2022, #1 in FY2023, #1 in FY2024 and #7 in FY2025; unchanged since FY2020.
2	Research Triangle Institute Top agencies EPA (Environmental Protection Agency)	$2,822,591	23.9%	Rank history: #1 in FY2022, #2 in FY2023, #2 in FY2024 and #1 in FY2025; unchanged since FY2020.
3	University of North Carolina at Chapel Hill Top agencies EPA (Environmental Protection Agency)	$415,313	3.5%	Rank history: #5 in FY2022, #3 in FY2023, #3 in FY2024 and #2 in FY2025; new, not ranked in FY2020.
4	American Testing, Inc. Top agencies HHS (Department of Health and Human Services)	$317,213	2.7%	Rank history: #7 in FY2022, #5 in FY2023, #5 in FY2024 and #6 in FY2025; up 2 since FY2020.
5	General Dynamics Corporation Through General Dynamics Information Technology, Inc. Top agencies EPA (Environmental Protection Agency)	$293,839	2.5%	Rank history: #8 in FY2022, not on the FY2023 list, #6 in FY2024 and not on the FY2025 list; down 2 since FY2020.
6	Perikin Enterprises LLC Top agencies Army (Department of the Army)	$272,140	2.3%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
7	Air Resource Specialists, Inc. Top agencies EPA (Environmental Protection Agency) DOI (Department of the Interior)	$246,355	2.1%	Rank history: #9 in FY2022, #10 in FY2023, #20 in FY2024 and #11 in FY2025; up 4 since FY2020.
8	Complete Packaging and Shipping Supplies, Inc. Top agencies DOI (Department of the Interior)	$217,859	1.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
9	Environmental Science Corporation Top agencies Navy (Department of the Navy)	$158,417	1.3%	Rank history: not on the FY2022 list, #14 in FY2023, not on the FY2024 list and #13 in FY2025; up 8 since FY2020.
10	Corrections Colorado Department of Through Colorado Department of Public Health & Environment Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$149,553	1.3%	Rank history: not on the FY2022 list, #27 in FY2023 and not on the FY2024–FY2025 lists; up 17 since FY2020.
11	Teya Enterprises LLC Top agencies Navy (Department of the Navy)	$128,642	1.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
12	Wilbur Technical Services LLC Top agencies DOS (Department of State)	$112,979	1.0%	Rank history: #4 in FY2022, #4 in FY2023, #4 in FY2024 and #8 in FY2025; up 1 since FY2020.
13	Ridelinks Inc. Top agencies VA (Department of Veterans Affairs)	$107,073	0.9%	Rank history: #11 in FY2022, #12 in FY2023, #11 in FY2024 and #21 in FY2025; up 2 since FY2020.
14	Intex Environmental Group, Inc. Top agencies Army (Department of the Army)	$105,323	0.9%	Rank history: #31 in FY2022, #15 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
15	Logis-Tech, LLC Top agencies Army (Department of the Army)	$99,658	0.8%	Rank history: #19 in FY2022, #31 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
16	Montana Dept. of Public Health Through Montana Department of Environmental Quality Top agencies USDA (Department of Agriculture)	$87,718	0.7%	Rank history: #29 in FY2022, #17 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
17	Trane U.S. Inc. Top agencies DOI (Department of the Interior)	$60,796	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
18	M.s. Hatch Consulting, LLC Top agencies Army (Department of the Army)	$50,985	0.4%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
19	Hampton Roads Mechanical of Virginia, LLC Top agencies Navy (Department of the Navy)	$48,388	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
20	Paula F Price Enterprises LLC Top agencies VA (Department of Veterans Affairs)	$44,920	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
21	Arrow Electronics, Inc. Through Immixtechnology Inc. Top agencies Army (Department of the Army)	$39,008	0.3%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
22	Wood Environment & Infrastructure Solutions Inc. Through WSP USA Environment & Infrastructure Inc. Top agencies EPA (Environmental Protection Agency)	$37,839	0.3%	Rank history: not on the FY2022–FY2025 lists; down 12 since FY2020.
23	Kane Environmental, Inc. Top agencies Navy (Department of the Navy)	$36,131	0.3%	Rank history: #23 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
24	Cedarville Engineering Group LLC Top agencies Navy (Department of the Navy)	$30,538	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
25	Trine Environmental Inc. Top agencies VA (Department of Veterans Affairs)	$27,189	0.2%	Rank history: #16 in FY2022, not on the FY2023–FY2024 lists and #19 in FY2025; down 17 since FY2020.
26	TTL Associates Inc. Top agencies VA (Department of Veterans Affairs)	$26,095	0.2%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
27	Pristine Home Inspections Inc. Top agencies VA (Department of Veterans Affairs)	$24,870	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
28	Hwsi GMBH Top agencies DOS (Department of State)	$24,797	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
29	Geoinsight, Inc. Top agencies DHS (Department of Homeland Security)	$24,350	0.2%	Rank history: not on the FY2022–FY2023 lists, #28 in FY2024 and not on the FY2025 list; up 1 since FY2020.
30	County of Sacramento Through Sacramento Metropolitan Air Quality Management District Top agencies VA (Department of Veterans Affairs)	$22,972	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
31	Green 2 Green Consulting LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$18,452	0.2%	Rank history: #25 in FY2022, #22 in FY2023, #21 in FY2024 and #30 in FY2025; new, not ranked in FY2020.
32	Crime Information Center Arkansas Through Arkansas Division of Environmental Quality Top agencies Army (Department of the Army)	$18,438	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
33	State of Maryland Top agencies HHS (Department of Health and Human Services)	$12,668	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
34	Renova Environmental Company Top agencies Navy (Department of the Navy)	$11,840	0.1%	Rank history: #6 in FY2022, #9 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2020.
35	AGX Inc. Top agencies VA (Department of Veterans Affairs)	$11,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
36	S365 Inc. Top agencies DHS (Department of Homeland Security)	$8,250	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
37	Gryphon Investors Inc. Through Trinity Consultants Inc. Top agencies DOJ (Department of Justice)	$4,000	<0.1%	Rank history: #35 in FY2022, #33 in FY2023, #34 in FY2024 and not on the FY2025 list; down 14 since FY2020.
38	State of Iowa Through Iowa Department of Natural Resources Top agencies USDA (Department of Agriculture)	$1,447	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
39	Trace Analytics, LLC Top agencies Navy (Department of the Navy)	$691	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 6 since FY2020.

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 $11.8 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 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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.

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