Top 27 Contractors in PSC H346: Inspection and Laboratory Services (except medical/dental): Water Purification and Sewage Treatment Equipment, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Cinka Construction & Consulting Services LLC Top agencies DHS (Department of Homeland Security)	$626,706	25.0%	Rank history: not on the FY2021 list, #1 in FY2022, #1 in FY2023, #2 in FY2024 and #2 in FY2025; up 1 since Aug 2024–Jul 2025.
2	The Maclean Group LLC Top agencies VA (Department of Veterans Affairs)	$427,619	17.1%	Rank history: not on the FY2021 list, #3 in FY2022, #2 in FY2023, #3 in FY2024 and #3 in FY2025; up 1 since Aug 2024–Jul 2025.
3	Hyperion Biotechnology, Inc. Top agencies VA (Department of Veterans Affairs)	$348,596	13.9%	Rank history: #1 in FY2021, #2 in FY2022, #4 in FY2023, #1 in FY2024 and #1 in FY2025; down 2 since Aug 2024–Jul 2025.
4	Catalyst Diving, Inc. Top agencies DOI (Department of the Interior)	$125,000	5.0%	Rank history: not on the FY2021–FY2023 lists, #35 in FY2024 and #6 in FY2025; up 25 since Aug 2024–Jul 2025.
5	American Lady Vets Services, Inc. Top agencies VA (Department of Veterans Affairs)	$86,349	3.4%	Rank history: not on the FY2021–FY2024 lists and #9 in FY2025; up 4 since Aug 2024–Jul 2025.
6	Ecolab Inc. 2 awardees, including Barclay Water Management, Inc. and Nalco Company LLC Top agencies VA (Department of Veterans Affairs)	$82,150	3.3%	Rank history: not on the FY2021 list, #31 in FY2022, #28 in FY2023, not on the FY2024 list and #18 in FY2025; up 11 since Aug 2024–Jul 2025.
7	Western Tank Services LLC Top agencies DOI (Department of the Interior)	$71,877	2.9%	Rank history: not on the FY2021–FY2024 lists and #11 in FY2025; new, not ranked in Aug 2024–Jul 2025.
8	HGS Engineering Inc. Top agencies VA (Department of Veterans Affairs)	$50,264	2.0%	Rank history: #23 in FY2021, #12 in FY2022, #15 in FY2023, #9 in FY2024 and #15 in FY2025; up 7 since Aug 2024–Jul 2025.
9	Kurita America Inc. Top agencies DOT (Department of Transportation)	$49,247	2.0%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; down 2 since Aug 2024–Jul 2025.
10	Groundwater Resources LLC Top agencies Army (Department of the Army)	$37,291	1.5%	Rank history: #19 in FY2021, #16 in FY2022, #22 in FY2023, #17 in FY2024 and #17 in FY2025; up 6 since Aug 2024–Jul 2025.
11	De Nora Water Technologies LLC Top agencies USAF (Department of the Air Force)	$32,500	1.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
12	D & D Laboratory LLC Top agencies VA (Department of Veterans Affairs)	$32,304	1.3%	Rank history: #26 in FY2021, #25 in FY2022, #29 in FY2023, #5 in FY2024 and #7 in FY2025; down 6 since Aug 2024–Jul 2025.
13	Tetra Tech, Inc. Top agencies Army (Department of the Army)	$31,040	1.2%	Rank history: not on the FY2021–FY2022 lists, #3 in FY2023, not on the FY2024 list and #19 in FY2025; new, not ranked in Aug 2024–Jul 2025.
14	Integrated Water Systems W.L.L. Top agencies DOS (Department of State)	$30,053	1.2%	Rank history: not on the FY2021–FY2023 lists, #30 in FY2024 and #26 in FY2025; up 11 since Aug 2024–Jul 2025.
15	Corrtech, Inc. Top agencies USAF (Department of the Air Force)	$29,850	1.2%	Rank history: #11 in FY2021, #24 in FY2022, #16 in FY2023, #23 in FY2024 and #20 in FY2025; up 4 since Aug 2024–Jul 2025.
16	El Paso Water Industrial Services, Inc. Top agencies DOS (Department of State)	$29,010	1.2%	Rank history: #12 in FY2021, #14 in FY2022, #17 in FY2023, #21 in FY2024 and #21 in FY2025; up 4 since Aug 2024–Jul 2025.
17	Schrass GMBH Top agencies Army (Department of the Army)	$19,462	0.8%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2023, #4 in FY2024 and #22 in FY2025; up 7 since Aug 2024–Jul 2025.
18	Fluid Solutions LLC Top agencies DOS (Department of State)	$19,222	0.8%	Rank history: #3 in FY2021, #23 in FY2022, #8 in FY2023, #27 in FY2024 and #35 in FY2025; up 16 since Aug 2024–Jul 2025.
19	Inland Potable Services, Inc. Top agencies USAF (Department of the Air Force) DOJ (Department of Justice)	$17,177	0.7%	Rank history: not on the FY2021 list, #40 in FY2022, #26 in FY2023, #38 in FY2024 and #32 in FY2025; up 12 since Aug 2024–Jul 2025.
20	Veritext LLC Through Pace Analytical Services, LLC Top agencies USDA (Department of Agriculture)	$11,644	0.5%	Rank history: #38 in FY2021, #18 in FY2022, #20 in FY2023, #18 in FY2024 and #25 in FY2025; down 2 since Aug 2024–Jul 2025.
21	Blue Ridge Analytical, LLC Top agencies USDA (Department of Agriculture)	$11,440	0.5%	Rank history: #20 in FY2021, #19 in FY2022, #23 in FY2023, #24 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
22	Teklab Inc. Top agencies VA (Department of Veterans Affairs)	$7,579	0.3%	Rank history: not on the FY2021–FY2023 lists, #37 in FY2024 and #29 in FY2025; up 8 since Aug 2024–Jul 2025.
23	Nancy Miller Top agencies DOI (Department of the Interior)	$4,692	0.2%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; up 3 since Aug 2024–Jul 2025.
24	Florida Department of Environmental Protection Top agencies DOJ (Department of Justice)	$3,499	0.1%	Rank history: not on the FY2021–FY2025 lists; up 9 since Aug 2024–Jul 2025.
25	Consor Engineers LLC Top agencies DOJ (Department of Justice)	$3,090	0.1%	Rank history: not on the FY2021–FY2024 lists and #33 in FY2025; new, not ranked in Aug 2024–Jul 2025.
26	Potable Divers Inc Top agencies DOI (Department of the Interior)	$3,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #32 in FY2023, #40 in FY2024 and #34 in FY2025; new, not ranked in Aug 2024–Jul 2025.
27	Bluegrass / Kesco, Inc. Top agencies DOJ (Department of Justice)	$2,730	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.

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 $2.5 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. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. 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.
• Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
• Rank changes compare with Aug 2024–Jul 2025. "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.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers