Top 100 Contractors in NAICS 221320: Sewage Treatment Facilities, FY2025

Name: Top 100 Contractors in NAICS 221320: Sewage Treatment Facilities, FY2025
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 71% of FY2025 NAICS 221320 contract dollars

Contract obligations: $237,935,687 Net of deobligations, by contracts coded NAICS 221320
Contractors: 157 Parent companies with an obligation
Largest contractor: Veolia Water West Operating Services Inc. $35.1 million, 14.4% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Veolia Water West Operating Services Inc. Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico)	$35,091,067	14.4%	Rank history: not on the FY2021–FY2023 lists and #4 in FY2024; up 3 since FY2024.
2	Aqua Engineers Inc. Top agencies Army (Department of the Army)	$28,141,640	11.6%	Rank history: #1 in FY2021, #2 in FY2022, #1 in FY2023 and #2 in FY2024; unchanged since FY2024.
3	American Water Works Company Inc. 2 awardees, including American Water Military Services, LLC and Illinois-American Water Company Top agencies Army (Department of the Army) Navy (Department of the Navy) DOJ (Department of Justice)	$27,359,369	11.3%	Rank history: #3 in FY2021, #1 in FY2022, #3 in FY2023 and #1 in FY2024; down 2 since FY2024.
4	Sunstate Environmental Services Inc. Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico)	$17,520,666	7.2%	Rank history: not on the FY2021–FY2024 lists; new.
5	Fort Bliss Water Services Company 2 awardees, including American States Utility Services Inc. and Old Dominion Utility Services, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$16,892,157	7.0%	Rank history: not on the FY2021–FY2023 lists and #3 in FY2024; down 2 since FY2024.
6	Foreign Utility Consolidated Reporting Top agencies Army (Department of the Army)	$13,121,244	5.4%	Rank history: #4 in FY2021, #4 in FY2022, #5 in FY2023 and #6 in FY2024; unchanged since FY2024.
7	Nikken Sogyo Co., Ltd. Top agencies Navy (Department of the Navy)	$12,528,634	5.2%	Rank history: #5 in FY2021, #7 in FY2022, #6 in FY2023 and #7 in FY2024; unchanged since FY2024.
8	Bairco Construction Inc. Top agencies DOI (Department of the Interior)	$7,738,457	3.2%	Rank history: not on the FY2021–FY2024 lists; new.
9	Perc Water Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$7,645,390	3.1%	Rank history: #9 in FY2021, #9 in FY2022, #9 in FY2023 and #9 in FY2024; unchanged since FY2024.
10	City of Aberdeen Top agencies Army (Department of the Army)	$7,553,816	3.1%	Rank history: #7 in FY2021, #8 in FY2022, #7 in FY2023 and #5 in FY2024; down 5 since FY2024.
11	Tama City Hall Top agencies USAF (Department of the Air Force)	$5,592,009	2.3%	Rank history: not on the FY2021 list, #6 in FY2022, #8 in FY2023 and #10 in FY2024; down 1 since FY2024.
12	South Granville Water & Sewer Auth Top agencies DOJ (Department of Justice)	$5,014,867	2.1%	Rank history: #11 in FY2021, #11 in FY2022, #11 in FY2023 and #13 in FY2024; up 1 since FY2024.
13	Nikken-Metawater JV Top agencies Navy (Department of the Navy)	$4,637,361	1.9%	Rank history: not on the FY2021–FY2022 lists, #10 in FY2023 and #14 in FY2024; up 1 since FY2024.
14	P D R Properties, Inc. Top agencies Army (Department of the Army)	$4,197,641	1.7%	Rank history: not on the FY2021–FY2023 lists and #11 in FY2024; down 3 since FY2024.
15	Municipality of Anchorage Top agencies USAF (Department of the Air Force)	$3,569,641	1.5%	Rank history: #18 in FY2021, #12 in FY2022, #13 in FY2023 and #16 in FY2024; up 1 since FY2024.
16	Florida Keys Aqueduct Authority Top agencies Navy (Department of the Navy)	$3,378,941	1.4%	Rank history: not on the FY2021–FY2023 lists and #53 in FY2024; up 37 since FY2024.
17	Harnett, County of North Carolina Top agencies Army (Department of the Army)	$3,240,821	1.3%	Rank history: #13 in FY2021, #20 in FY2022, #14 in FY2023 and #17 in FY2024; unchanged since FY2024.
18	Optech-Monette, LLC Top agencies USAF (Department of the Air Force)	$3,117,682	1.3%	Rank history: #14 in FY2021, #13 in FY2022, #12 in FY2023 and #15 in FY2024; down 3 since FY2024.
19	Optimum Environmental Corporation Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$2,146,174	0.9%	Rank history: #50 in FY2021, #53 in FY2022, #37 in FY2023 and #30 in FY2024; up 11 since FY2024.
20	City of Hopewell Hrwtf Top agencies DOJ (Department of Justice)	$2,127,789	0.9%	Rank history: not on the FY2021–FY2023 lists and #31 in FY2024; up 11 since FY2024.
21	Schwarz Construction LLC Top agencies Army (Department of the Army)	$1,827,460	0.8%	Rank history: not on the FY2021–FY2022 lists, #18 in FY2023 and #19 in FY2024; down 2 since FY2024.
22	C-A Native Constructors Inc. Top agencies Army (Department of the Army)	$1,305,863	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
23	County of Lee Top agencies DOJ (Department of Justice)	$1,056,472	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
24	Town of North Hempstead Top agencies DOT (Department of Transportation)	$1,030,382	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
25	City of Leavenworth KS Top agencies Army (Department of the Army)	$1,029,085	0.4%	Rank history: #35 in FY2021, #28 in FY2022, #32 in FY2023 and #28 in FY2024; up 3 since FY2024.
26	Village of Saranac Lake Top agencies DOJ (Department of Justice)	$1,001,990	0.4%	Rank history: #31 in FY2021, #26 in FY2022, #23 in FY2023 and #27 in FY2024; up 1 since FY2024.
27	Gregg Township Municipal Authority Top agencies DOJ (Department of Justice)	$968,308	0.4%	Rank history: #30 in FY2021, #33 in FY2022, #24 in FY2023 and #24 in FY2024; down 3 since FY2024.
28	DCS Infrastructure, LLC Top agencies VA (Department of Veterans Affairs)	$912,329	0.4%	Rank history: #19 in FY2021, #18 in FY2022, #20 in FY2023 and #20 in FY2024; down 8 since FY2024.
29	Lowndes County Board of Commissioners Top agencies USAF (Department of the Air Force)	$846,493	0.3%	Rank history: #59 in FY2021, #54 in FY2022, #45 in FY2023 and #21 in FY2024; down 8 since FY2024.
30	City of Pekin Top agencies DOJ (Department of Justice)	$807,352	0.3%	Rank history: #42 in FY2021, #42 in FY2022, #40 in FY2023 and #41 in FY2024; up 11 since FY2024.
31	Herlong Public Utility District Top agencies DOJ (Department of Justice) Army (Department of the Army)	$796,155	0.3%	Rank history: #41 in FY2021, not on the FY2022 list, #75 in FY2023 and #38 in FY2024; up 7 since FY2024.
32	Lafayette Township Top agencies DOJ (Department of Justice)	$776,442	0.3%	Rank history: #54 in FY2021, #40 in FY2022, #36 in FY2023 and #34 in FY2024; up 2 since FY2024.
33	San Antonio River Authority Top agencies USAF (Department of the Air Force) DOI (Department of the Interior)	$691,545	0.3%	Rank history: #26 in FY2021, #25 in FY2022, #19 in FY2023 and #37 in FY2024; up 4 since FY2024.
34	Project Solutions, Inc. Top agencies USAF (Department of the Air Force) USDA (Department of Agriculture)	$684,517	0.3%	Rank history: #52 in FY2021, #43 in FY2022, #31 in FY2023 and #29 in FY2024; down 5 since FY2024.
35	Paintsville Utilities Commission Top agencies DOJ (Department of Justice)	$679,934	0.3%	Rank history: #94 in FY2021, not on the FY2022–FY2023 lists and #39 in FY2024; up 4 since FY2024.
36	Fremont Sanitation District Top agencies DOJ (Department of Justice)	$595,584	0.2%	Rank history: #48 in FY2021, #39 in FY2022, not on the FY2023 list and #35 in FY2024; down 1 since FY2024.
37	Kent County Government Top agencies USAF (Department of the Air Force)	$579,122	0.2%	Rank history: #57 in FY2021, #51 in FY2022, #47 in FY2023 and #40 in FY2024; up 3 since FY2024.
38	City of Berlin Top agencies DOJ (Department of Justice)	$504,647	0.2%	Rank history: not on the FY2021–FY2023 lists and #45 in FY2024; up 7 since FY2024.
39	Waymart Area Authority Top agencies DOJ (Department of Justice)	$487,738	0.2%	Rank history: not on the FY2021–FY2023 lists and #43 in FY2024; up 4 since FY2024.
40	Al Musairie Trading & Contracting Company -Qatar Top agencies USAF (Department of the Air Force)	$462,240	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
41	Preston County Public Service District Top agencies DOJ (Department of Justice)	$394,262	0.2%	Rank history: #58 in FY2021, #49 in FY2022, #74 in FY2023 and #36 in FY2024; down 5 since FY2024.
42	Texas Water Utilities, L.P. Top agencies DOJ (Department of Justice)	$387,846	0.2%	Rank history: #27 in FY2021, #27 in FY2022, #48 in FY2023 and not on the FY2024 list; returned.
43	Maryland Environmental Service Top agencies Smithsonian (Smithsonian Institution)	$376,469	0.2%	Rank history: not on the FY2021–FY2023 lists and #69 in FY2024; up 26 since FY2024.
44	Cayuse Federal Services LLC Top agencies Navy (Department of the Navy)	$349,529	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
45	Sociedade De Empreitadas E Trabalhos Hidraulicos, S.A. Top agencies USAF (Department of the Air Force)	$346,058	0.1%	Rank history: not on the FY2021–FY2023 lists and #49 in FY2024; up 4 since FY2024.
46	Sarandrea Associates Group Corp Top agencies USAF (Department of the Air Force)	$326,910	0.1%	Rank history: not on the FY2021–FY2023 lists and #66 in FY2024; up 20 since FY2024.
47	Nsp-Bch, LLC Top agencies USAF (Department of the Air Force)	$320,474	0.1%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2023 and #51 in FY2024; up 4 since FY2024.
48	Agra Environmental Service, Inc. Top agencies VA (Department of Veterans Affairs)	$320,300	0.1%	Rank history: not on the FY2021–FY2023 lists and #48 in FY2024; unchanged since FY2024.
49	Fairbanks Sewer & Water Inc. Through Golden Heart Utilities, Inc. Top agencies Army (Department of the Army)	$311,299	0.1%	Rank history: #20 in FY2021, #16 in FY2022, #16 in FY2023 and #18 in FY2024; down 31 since FY2024.
50	Watertalent, LLC Top agencies DOI (Department of the Interior)	$300,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
51	Tareq Al Mostaqbal Logistic Services L.l.c Top agencies USAF (Department of the Air Force)	$298,271	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
52	A. James Global Services, Inc. Top agencies USAF (Department of the Air Force)	$287,420	0.1%	Rank history: not on the FY2021 list, #69 in FY2022, #57 in FY2023 and #46 in FY2024; down 6 since FY2024.
53	Pacific Northwest Environmental Services LLC Top agencies USDA (Department of Agriculture)	$287,004	0.1%	Rank history: #74 in FY2021, #72 in FY2022, #59 in FY2023 and #50 in FY2024; down 3 since FY2024.
54	Hennesy Mechanical Sales LLC Top agencies DOI (Department of the Interior)	$263,369	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
55	City of Anadarko City Hall Top agencies DOI (Department of the Interior)	$256,646	0.1%	Rank history: not on the FY2021 list, #87 in FY2022, #92 in FY2023 and #42 in FY2024; down 13 since FY2024.
56	City of Alexandria Virginia Sanitation Authority Top agencies WHS (DOD Washington Headquarters Service)	$244,011	0.1%	Rank history: #75 in FY2021, not on the FY2022 list, #72 in FY2023 and #80 in FY2024; up 24 since FY2024.
57	Gotemba Eiseisha, Co. Ltd. Top agencies Navy (Department of the Navy)	$233,853	0.1%	Rank history: #71 in FY2021, #63 in FY2022, #64 in FY2023 and #56 in FY2024; down 1 since FY2024.
58	City of Manchester Top agencies DOJ (Department of Justice)	$230,331	0.1%	Rank history: not on the FY2021 list, #55 in FY2022, #60 in FY2023 and #47 in FY2024; down 11 since FY2024.
59	Lab Leasing Co., Inc. Top agencies USDA (Department of Agriculture)	$216,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #39 in FY2023 and #32 in FY2024; down 27 since FY2024.
60	Fineeco Top agencies Army (Department of the Army)	$212,968	0.1%	Rank history: not on the FY2021–FY2024 lists; up 77 since FY2024.
61	K.i. Kogyo Ltd. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$194,513	0.1%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2023 and not on the FY2024 list; returned.
62	Kaihou Kogyo Co., Ltd. Top agencies USAF (Department of the Air Force)	$188,640	0.1%	Rank history: #73 in FY2021, #66 in FY2022, #53 in FY2023 and #58 in FY2024; down 4 since FY2024.
63	Kankyo Gijutsu KK Top agencies USAF (Department of the Air Force)	$179,655	0.1%	Rank history: #79 in FY2021, #71 in FY2022, #66 in FY2023 and #62 in FY2024; down 1 since FY2024.
64	Clean Infusion LLC Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico)	$174,492	0.1%	Rank history: not on the FY2021–FY2023 lists and #23 in FY2024; down 41 since FY2024.
65	Urban Construction Bureau, Sagamihara City Top agencies Army (Department of the Army)	$167,472	0.1%	Rank history: not on the FY2021 list, #76 in FY2022, #77 in FY2023 and #65 in FY2024; unchanged since FY2024.
66	Sankyo Denki Koji Co.,Ltd. Top agencies Navy (Department of the Navy)	$167,430	0.1%	Rank history: #88 in FY2021, #81 in FY2022 and not on the FY2023–FY2024 lists; returned.
67	Bar Environmental Supply Inc. Top agencies USDA (Department of Agriculture)	$159,220	0.1%	Rank history: not on the FY2021–FY2024 lists; up 67 since FY2024.
68	Illinois-American Water Company Top agencies DOJ (Department of Justice)	$157,963	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
69	Rockaway Valley Reg Sewer Auth Top agencies Army (Department of the Army)	$151,061	0.1%	Rank history: #84 in FY2021, #84 in FY2022, #85 in FY2023 and #61 in FY2024; down 8 since FY2024.
70	Nicklaus Engineering, Inc. Top agencies Army (Department of the Army)	$132,385	0.1%	Rank history: #62 in FY2021, #67 in FY2022, #84 in FY2023 and #52 in FY2024; down 18 since FY2024.
71	B & M Technical Services, Inc. Top agencies DOJ (Department of Justice)	$125,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
72	M Davidson & Associates Inc. Top agencies Army (Department of the Army)	$102,700	<0.1%	Rank history: not on the FY2021–FY2022 lists, #99 in FY2023 and #77 in FY2024; up 5 since FY2024.
73	Gwendolyn C. Hill Top agencies Army (Department of the Army)	$99,800	<0.1%	Rank history: not on the FY2021 list, #94 in FY2022, #96 in FY2023 and #79 in FY2024; up 6 since FY2024.
74	Bristol Bay Borough Of Top agencies USAF (Department of the Air Force)	$95,000	<0.1%	Rank history: #98 in FY2021, #93 in FY2022, #94 in FY2023 and #76 in FY2024; up 2 since FY2024.
75	Schrass GMBH Top agencies USAF (Department of the Air Force)	$91,938	<0.1%	Rank history: #81 in FY2021, #79 in FY2022, #89 in FY2023 and #78 in FY2024; up 3 since FY2024.
76	City of Jeffersonville Top agencies Commerce (Department of Commerce)	$90,000	<0.1%	Rank history: not on the FY2021 list, #90 in FY2022, not on the FY2023 list and #98 in FY2024; up 22 since FY2024.
77	Ronielle Howard & Associates LLC Top agencies Army (Department of the Army)	$84,664	<0.1%	Rank history: not on the FY2021–FY2023 lists and #84 in FY2024; up 7 since FY2024.
78	Denver Board of Water Commissioners Top agencies Treasury (Department of the Treasury)	$84,487	<0.1%	Rank history: not on the FY2021 list, #78 in FY2022, #76 in FY2023 and #60 in FY2024; down 18 since FY2024.
79	City of Richmond Top agencies SSA (Social Security Administration)	$83,895	<0.1%	Rank history: #90 in FY2021, #85 in FY2022, #86 in FY2023 and #64 in FY2024; down 15 since FY2024.
80	Miller Environmental Inc. Top agencies DOI (Department of the Interior)	$76,904	<0.1%	Rank history: not on the FY2021 list, #86 in FY2022, not on the FY2023 list and #86 in FY2024; up 6 since FY2024.
81	Instrulink LLC Top agencies DOI (Department of the Interior)	$72,716	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
82	Comp Environmental Inc. Top agencies Navy (Department of the Navy)	$72,222	<0.1%	Rank history: not on the FY2021–FY2023 lists and #83 in FY2024; up 1 since FY2024.
83	White Mountain Apache Tribe Top agencies HHS (Department of Health and Human Services)	$71,806	<0.1%	Rank history: #86 in FY2021, not on the FY2022–FY2023 lists and #68 in FY2024; down 15 since FY2024.
84	City of Monterey Top agencies Army (Department of the Army)	$69,003	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
85	Binary Exchange Technologies LLC Top agencies Army (Department of the Army)	$65,026	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
86	GPC Consolidated Reporting Top agencies USDA (Department of Agriculture)	$64,419	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 47 since FY2024.
87	Beckley Sanitary Board Top agencies DOL (Department of Labor)	$61,460	<0.1%	Rank history: #15 in FY2021 and not on the FY2022–FY2024 lists; up 32 since FY2024.
88	Sulzer AG Through JWC Environmental Inc. Top agencies DOJ (Department of Justice)	$60,251	<0.1%	Rank history: not on the FY2021–FY2023 lists and #94 in FY2024; up 6 since FY2024.
89	Tecc Corporation Top agencies Army (Department of the Army)	$59,150	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
90	Eagle Butte City Office Top agencies DOI (Department of the Interior)	$57,231	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
91	Environmental Systems Service, Ltd. Top agencies DHS (Department of Homeland Security)	$55,002	<0.1%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2024; up 1 since FY2024.
92	Nihon Highway Service Co.,Ltd. Top agencies Army (Department of the Army)	$53,523	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
93	Broadbent & Associates, Inc. Top agencies Army (Department of the Army)	$52,800	<0.1%	Rank history: not on the FY2021–FY2023 lists and #93 in FY2024; unchanged since FY2024.
94	MC3 Solutions LLC Top agencies DOI (Department of the Interior)	$49,870	<0.1%	Rank history: not on the FY2021–FY2023 lists and #54 in FY2024; down 40 since FY2024.
95	Muhan Co., Ltd Top agencies Army (Department of the Army)	$48,668	<0.1%	Rank history: not on the FY2021–FY2023 lists and #96 in FY2024; up 1 since FY2024.
96	Delta Diablo Top agencies Army (Department of the Army)	$47,787	<0.1%	Rank history: #100 in FY2021 and not on the FY2022–FY2024 lists; up 53 since FY2024.
97	Jet Inc. Top agencies DOS (Department of State)	$45,328	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 10 since FY2024.
98	NC Water & Fire Restoration Inc. Top agencies VA (Department of Veterans Affairs)	$42,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
99	Colorado River Sewage System Joint Venture Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior)	$37,924	<0.1%	Rank history: not on the FY2021–FY2023 lists and #100 in FY2024; up 1 since FY2024.
100	Allegheny Site Management, Inc. Top agencies USDA (Department of Agriculture)	$34,696	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 11 since FY2024.

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100 of 157 contractors listed here. See the rest on GovTribe.

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 $243 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 2025 ran Oct 1, 2024 – Sep 30, 2025. 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 FY2024. "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 FY2024 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

Who were the top 10 NAICS 221320 contractors in FY2025?

1. Veolia Water West Operating Services Inc. ($35.1M), 2. Aqua Engineers Inc. ($28.1M), 3. American Water Works Company Inc. ($27.4M), 4. Sunstate Environmental Services Inc. ($17.5M), 5. Fort Bliss Water Services Company ($16.9M), 6. Foreign Utility Consolidated Reporting ($13.1M), 7. Nikken Sogyo Co., Ltd. ($12.5M), 8. Bairco Construction Inc. ($7.74M), 9. Perc Water Corporation ($7.65M), 10. City of Aberdeen ($7.55M).

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