Top 100 Contractors in NAICS 22131: Water Supply and Irrigation Systems, FY2024

Name: Top 100 Contractors in NAICS 22131: Water Supply and Irrigation Systems, FY2024
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2023 – Sep 30, 2024 Code page on GovTribe

The top 10 won 71% of FY2024 NAICS 22131 contract dollars

Contract obligations: $623,372,176 Net of deobligations, by contracts coded NAICS 22131 or a code under it
Contractors: 638 Parent companies with an obligation
Largest contractor: American Water Works Company Inc. $197 million, 30.7% 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	American Water Works Company Inc. 8 awardees, including American Water Operations and Maintenance, LLC, American Water Military Services, LLC and California-American Water Company Top agencies Army (Department of the Army) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$196,571,522	30.7%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and #1 in FY2025; unchanged since FY2023.
2	Fort Bliss Water Services Company 5 awardees, including Old North Utility Services, Inc., Palmetto State Utility Services, Inc. and American States Utility Services Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$75,759,630	11.8%	Rank history: not on the FY2021 list, #14 in FY2022, #6 in FY2023 and #2 in FY2025; up 4 since FY2023.
3	Oklahoma City Water Utilities Trust 2 awardees Top agencies USAF (Department of the Air Force)	$35,664,995	5.6%	Rank history: not on the FY2021 list, #10 in FY2022, #3 in FY2023 and #5 in FY2025; unchanged since FY2023.
4	Jacobs Government Services Company 2 awardees, including Ch2M Hill Constructors, Inc. and Jacobs Project Management Co Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$30,746,967	4.8%	Rank history: not on the FY2021–FY2022 lists, #11 in FY2023 and #4 in FY2025; up 7 since FY2023.
5	Fort Riley Utility Services, Inc. Top agencies Army (Department of the Army)	$27,721,270	4.3%	Rank history: #5 in FY2021, #3 in FY2022, #4 in FY2023 and #11 in FY2025; down 1 since FY2023.
6	Old North Utility Services Inc. 3 awardees, including Terrapin Utility Services, Inc. and Palmetto State Utility Services, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$21,764,752	3.4%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2023 and not on the FY2025 list; down 4 since FY2023.
7	Emerald Coast Utility Services Inc. Top agencies USAF (Department of the Air Force)	$18,952,172	3.0%	Rank history: #6 in FY2021, #5 in FY2022, #5 in FY2023 and #9 in FY2025; down 2 since FY2023.
8	Washington Suburban Sanitary Commission Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration) Smithsonian (Smithsonian Institution)	$16,684,047	2.6%	Rank history: #9 in FY2021, #7 in FY2022, #7 in FY2023 and #10 in FY2025; down 1 since FY2023.
9	Augusta-Richmond County Government Top agencies Army (Department of the Army)	$14,211,072	2.2%	Rank history: #10 in FY2021, #8 in FY2022, #13 in FY2023 and #7 in FY2025; up 4 since FY2023.
10	American Water Enterprises, LLC Top agencies Army (Department of the Army)	$13,889,723	2.2%	Rank history: #3 in FY2021, #6 in FY2022, #8 in FY2023 and #12 in FY2025; down 2 since FY2023.
11	Base Utilities Inc. Top agencies USAF (Department of the Air Force)	$13,888,949	2.2%	Rank history: #7 in FY2021, #9 in FY2022, #10 in FY2023 and #14 in FY2025; down 1 since FY2023.
12	Foreign Utility Consolidated Reporting Top agencies Army (Department of the Army)	$8,865,272	1.4%	Rank history: #13 in FY2021, #12 in FY2022, #12 in FY2023 and #15 in FY2025; unchanged since FY2023.
13	Riverbend Water Resources District Top agencies Army (Department of the Army)	$8,385,861	1.3%	Rank history: #19 in FY2021, #15 in FY2022, #17 in FY2023 and #16 in FY2025; up 4 since FY2023.
14	Central Coast Water Authority Top agencies USAF (Department of the Air Force)	$8,073,743	1.3%	Rank history: #15 in FY2021, #16 in FY2022, #15 in FY2023 and #18 in FY2025; up 1 since FY2023.
15	GTA Containers, LLC 2 awardees Top agencies Army (Department of the Army)	$6,965,250	1.1%	Rank history: not on the FY2021–FY2022 lists, #18 in FY2023 and #20 in FY2025; up 3 since FY2023.
16	Florida Governmental Utility Authority Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$6,939,312	1.1%	Rank history: #8 in FY2021, #11 in FY2022, #16 in FY2023 and not on the FY2025 list; unchanged since FY2023.
17	SES Energy Services LLC Top agencies Army (Department of the Army)	$5,393,049	0.8%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2025; new.
18	Pural Water Specialty Co. , Inc. Top agencies Army (Department of the Army) Smithsonian (Smithsonian Institution)	$4,565,412	0.7%	Rank history: #14 in FY2021, #20 in FY2022, #14 in FY2023 and #26 in FY2025; down 4 since FY2023.
19	Numunu Staffing LLC Top agencies Army (Department of the Army)	$4,512,483	0.7%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
20	California Water Service Group Through California Water Service Co Top agencies USAF (Department of the Air Force) DOI (Department of the Interior) DCMA (Defense Contract Management Agency)	$4,506,777	0.7%	Rank history: #24 in FY2021, #32 in FY2022, #22 in FY2023 and #29 in FY2025; up 2 since FY2023.
21	County of Hardin Through Hardin County Water District NO. 1 Top agencies Army (Department of the Army)	$4,189,855	0.7%	Rank history: not on the FY2021–FY2023 lists and #8 in FY2025; new.
22	Antelope Valley East Kern Water Agency Top agencies USAF (Department of the Air Force)	$3,772,117	0.6%	Rank history: #22 in FY2021, #21 in FY2022, #21 in FY2023 and #28 in FY2025; down 1 since FY2023.
23	Hardin County Water District NO. 1 Top agencies Army (Department of the Army)	$3,037,866	0.5%	Rank history: #17 in FY2021, #18 in FY2022, #19 in FY2023 and not on the FY2025 list; down 4 since FY2023.
24	Clear Lake City Water Authority Top agencies NASA (National Aeronautics and Space Administration)	$2,730,405	0.4%	Rank history: #52 in FY2021, #74 in FY2022, #51 in FY2023 and #53 in FY2025; up 27 since FY2023.
25	Pyeongtaek-Si Water and Sewage Business Place Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$2,679,889	0.4%	Rank history: #16 in FY2021, #22 in FY2022, #25 in FY2023 and #22 in FY2025; unchanged since FY2023.
26	Fayetteville City of Through Fayetteville Public Works Commission Top agencies Army (Department of the Army)	$2,507,005	0.4%	Rank history: #25 in FY2021, #23 in FY2022, #26 in FY2023 and not on the FY2025 list; unchanged since FY2023.
27	City of Wildwood City Hall Top agencies DOJ (Department of Justice)	$2,488,054	0.4%	Rank history: #28 in FY2021, #27 in FY2022, #33 in FY2023 and #24 in FY2025; up 6 since FY2023.
28	Solid Blend Technologies, Inc. Top agencies VA (Department of Veterans Affairs)	$2,431,011	0.4%	Rank history: not on the FY2021–FY2023 lists and #40 in FY2025; new.
29	City of Florence Top agencies DOJ (Department of Justice)	$2,077,230	0.3%	Rank history: #31 in FY2021, #31 in FY2022, not on the FY2023 list and #38 in FY2025; up 150 since FY2023.
30	Northeast Ohio Regional Sewer District Top agencies NASA (National Aeronautics and Space Administration)	$2,034,000	0.3%	Rank history: #30 in FY2021, #40 in FY2022, #30 in FY2023 and #33 in FY2025; unchanged since FY2023.
31	Weeminuche Construction Authority Through WCA Construction, LLC Top agencies DOI (Department of the Interior)	$2,015,100	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
32	Jungbu Water Supply Office Top agencies Army (Department of the Army)	$1,987,055	0.3%	Rank history: #27 in FY2021, #26 in FY2022, #31 in FY2023 and #34 in FY2025; down 1 since FY2023.
33	City of Aliceville Top agencies DOJ (Department of Justice)	$1,762,774	0.3%	Rank history: #37 in FY2021, #43 in FY2022, #35 in FY2023 and #39 in FY2025; up 2 since FY2023.
34	City of Chesapeake Top agencies Navy (Department of the Navy)	$1,400,980	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
35	Board of Water Commissioners of Columbus Top agencies Army (Department of the Army)	$1,350,620	0.2%	Rank history: #54 in FY2021, #79 in FY2022, #20 in FY2023 and #46 in FY2025; down 15 since FY2023.
36	City of Jacksonville Ar Through City of Jacksonville Top agencies USAF (Department of the Air Force)	$1,306,596	0.2%	Rank history: not on the FY2021 list, #33 in FY2022, #23 in FY2023 and #45 in FY2025; down 13 since FY2023.
37	City of Freeport Top agencies DOE (Department of Energy)	$1,300,000	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
38	Evoqua Water Technologies, LLC 6 awardees, including Neptune Benson Inc. Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$1,202,331	0.2%	Rank history: not on the FY2021–FY2023 lists and #67 in FY2025; up 135 since FY2023.
39	Public Service Commission of Yazoo City Top agencies DOJ (Department of Justice)	$1,179,945	0.2%	Rank history: #35 in FY2021, #48 in FY2022, #38 in FY2023 and #50 in FY2025; down 1 since FY2023.
40	City of Welch Top agencies DOJ (Department of Justice)	$1,077,669	0.2%	Rank history: #48 in FY2021, #53 in FY2022, #52 in FY2023 and #54 in FY2025; up 12 since FY2023.
41	Kyotango City Top agencies Army (Department of the Army)	$1,047,636	0.2%	Rank history: not on the FY2021 list, #42 in FY2022, #46 in FY2023 and #47 in FY2025; up 5 since FY2023.
42	City of Cocoa Top agencies NASA (National Aeronautics and Space Administration)	$991,481	0.2%	Rank history: #90 in FY2021, #47 in FY2022, #47 in FY2023 and #41 in FY2025; up 5 since FY2023.
43	Forte Insurance (Cambodia) PLC Top agencies DOS (Department of State)	$989,340	0.2%	Rank history: #66 in FY2021, #84 in FY2022, #89 in FY2023 and #49 in FY2025; up 46 since FY2023.
44	Preston County Public Service District NO4 Top agencies DOJ (Department of Justice)	$940,861	0.1%	Rank history: #47 in FY2021, #52 in FY2022, #60 in FY2023 and #51 in FY2025; up 16 since FY2023.
45	Agribusiness Development Corporation Top agencies Navy (Department of the Navy)	$924,330	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
46	City of Greenville Top agencies DOJ (Department of Justice)	$867,823	0.1%	Rank history: #51 in FY2021, #64 in FY2022, #55 in FY2023 and #76 in FY2025; up 9 since FY2023.
47	City of El Reno Top agencies DOJ (Department of Justice)	$845,659	0.1%	Rank history: #62 in FY2021, #62 in FY2022, #68 in FY2023 and #60 in FY2025; up 21 since FY2023.
48	Utility Systems of Georgia, Inc. Top agencies Army (Department of the Army)	$817,872	0.1%	Rank history: #60 in FY2021, #75 in FY2022, #66 in FY2023 and #57 in FY2025; up 18 since FY2023.
49	Columbiana County Top agencies DOJ (Department of Justice)	$812,086	0.1%	Rank history: #36 in FY2021, not on the FY2022 list, #69 in FY2023 and #58 in FY2025; up 20 since FY2023.
50	City of Danbury CT Top agencies DOJ (Department of Justice)	$760,000	0.1%	Rank history: #39 in FY2021, #59 in FY2022, #61 in FY2023 and #63 in FY2025; up 11 since FY2023.
51	City of Forrest City 2 awardees Top agencies DOJ (Department of Justice)	$736,311	0.1%	Rank history: not on the FY2021–FY2022 lists, #59 in FY2023 and not on the FY2025 list; up 8 since FY2023.
52	Town of Alderson Top agencies DOJ (Department of Justice)	$714,559	0.1%	Rank history: #72 in FY2021, #78 in FY2022, #73 in FY2023 and #61 in FY2025; up 21 since FY2023.
53	IWC Innovations LLC Top agencies GSA (General Services Administration)	$685,987	0.1%	Rank history: not on the FY2021–FY2022 lists, #39 in FY2023 and not on the FY2025 list; down 14 since FY2023.
54	Woodway Water Authority Top agencies DOJ (Department of Justice)	$681,460	0.1%	Rank history: #65 in FY2021, #87 in FY2022, #76 in FY2023 and #65 in FY2025; up 22 since FY2023.
55	Indiana County Municipal Service Authority Top agencies Army (Department of the Army)	$661,562	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
56	Aviate Enterprises, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$658,563	0.1%	Rank history: not on the FY2021–FY2023 lists and #44 in FY2025; up 96 since FY2023.
57	Tatonka Trucking Llc. Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico)	$649,204	0.1%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2023 and #97 in FY2025; down 16 since FY2023.
58	City of Leavenworth Top agencies DOJ (Department of Justice)	$636,401	0.1%	Rank history: #91 in FY2021, #85 in FY2022, #24 in FY2023 and not on the FY2025 list; down 34 since FY2023.
59	Enviroh20 LLC Top agencies VA (Department of Veterans Affairs)	$622,009	0.1%	Rank history: not on the FY2021–FY2023 lists and #66 in FY2025; up 94 since FY2023.
60	City of Newport News Top agencies NASA (National Aeronautics and Space Administration)	$618,834	0.1%	Rank history: #94 in FY2021, not on the FY2022 list, #86 in FY2023 and not on the FY2025 list; up 26 since FY2023.
61	Water Authority Busan Metropolitan City Korea 6 awardees, including Daegu Metropolitan City, Headquarters, Daegu Waterworks and Headquarters of Pohang Waterworks Top agencies Army (Department of the Army)	$613,740	0.1%	Rank history: #82 in FY2021, #82 in FY2022, #79 in FY2023 and not on the FY2025 list; up 18 since FY2023.
62	Eagle Harbor, LLC Top agencies Army (Department of the Army)	$609,525	0.1%	Rank history: #77 in FY2021, #81 in FY2022, #82 in FY2023 and not on the FY2025 list; up 20 since FY2023.
63	The Water Works and Sewer Board of the City of Anniston, Alabama Top agencies DHS (Department of Homeland Security)	$601,870	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 85 since FY2023.
64	Fluid Solutions LLC Top agencies DOS (Department of State)	$559,207	0.1%	Rank history: #98 in FY2021, not on the FY2022 list, #87 in FY2023 and #55 in FY2025; up 23 since FY2023.
65	Veterans Elite Inc Top agencies VA (Department of Veterans Affairs)	$550,800	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 52 since FY2023.
66	Columbia Resource Conservation District Top agencies DOI (Department of the Interior)	$548,653	0.1%	Rank history: not on the FY2021 list, #93 in FY2022, not on the FY2023 list and #82 in FY2025; up 83 since FY2023.
67	City of Fort Worth Top agencies Treasury (Department of the Treasury)	$542,885	0.1%	Rank history: not on the FY2021–FY2023 lists and #73 in FY2025; new.
68	Green and Sustainable Services, LLC Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$542,563	0.1%	Rank history: not on the FY2021 list, #83 in FY2022, #92 in FY2023 and #77 in FY2025; up 24 since FY2023.
69	Virginia-American Water Company Top agencies Army (Department of the Army)	$541,324	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
70	Nephros, Inc. Top agencies VA (Department of Veterans Affairs)	$534,811	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
71	Allegany County Commissioners Top agencies DOJ (Department of Justice)	$527,782	0.1%	Rank history: #95 in FY2021, #80 in FY2022, #93 in FY2023 and #96 in FY2025; up 22 since FY2023.
72	State of Hawaii Through Agribusiness Development Corporation Top agencies Navy (Department of the Navy)	$494,621	0.1%	Rank history: #43 in FY2021, #57 in FY2022, #91 in FY2023 and not on the FY2025 list; up 19 since FY2023.
73	City of Lawrence Top agencies DOI (Department of the Interior)	$474,375	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 38 since FY2023.
74	Hydro, Inc. Top agencies HHS (Department of Health and Human Services)	$464,468	0.1%	Rank history: not on the FY2021–FY2023 lists and #91 in FY2025; new.
75	City of Big Spring Top agencies DOJ (Department of Justice)	$449,958	0.1%	Rank history: #81 in FY2021, not on the FY2022 list, #78 in FY2023 and not on the FY2025 list; up 3 since FY2023.
76	Water Treatment Services Inc. Top agencies VA (Department of Veterans Affairs)	$430,718	0.1%	Rank history: not on the FY2021 list, #70 in FY2022, not on the FY2023 list and not on the FY2025 list; up 26 since FY2023.
77	Coventina Water, LLC Top agencies VA (Department of Veterans Affairs)	$418,577	0.1%	Rank history: not on the FY2021–FY2023 lists and #42 in FY2025; up 42 since FY2023.
78	City of Prestonsburg Through Prestonsburg City Utilities Commission Top agencies DOJ (Department of Justice)	$408,839	0.1%	Rank history: #73 in FY2021, #71 in FY2022, #62 in FY2023 and not on the FY2025 list; down 16 since FY2023.
79	Disabled Veterans Construction Inc. Top agencies VA (Department of Veterans Affairs)	$408,395	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 276 since FY2023.
80	City of Del RIO Top agencies USAF (Department of the Air Force)	$385,928	0.1%	Rank history: #87 in FY2021, not on the FY2022–FY2023 lists and #87 in FY2025; up 27 since FY2023.
81	Essential Utilities, Inc. Top agencies DOJ (Department of Justice)	$375,996	0.1%	Rank history: #99 in FY2021, not on the FY2022 list, #100 in FY2023 and #80 in FY2025; up 19 since FY2023.
82	Veolia WTS Services USA Inc Top agencies Navy (Department of the Navy)	$370,225	0.1%	Rank history: not on the FY2021–FY2023 lists and #88 in FY2025; new.
83	Middlesex Water Company Through Tidewater Utilities Inc. Top agencies USAF (Department of the Air Force)	$367,940	0.1%	Rank history: #63 in FY2021, #92 in FY2022, not on the FY2023 list and not on the FY2025 list; up 22 since FY2023.
84	Mayfort Milling Company Private Limited Top agencies DOS (Department of State)	$360,317	0.1%	Rank history: #70 in FY2021, #96 in FY2022, not on the FY2023 list and #70 in FY2025; up 34 since FY2023.
85	Rosales Daniel Top agencies USAF (Department of the Air Force)	$356,462	0.1%	Rank history: not on the FY2021–FY2023 lists and #94 in FY2025; up 30 since FY2023.
86	Liquitech, Inc. Top agencies VA (Department of Veterans Affairs)	$345,045	0.1%	Rank history: not on the FY2021 list, #65 in FY2022, #88 in FY2023 and #71 in FY2025; up 2 since FY2023.
87	Prestonsburg City Utilities Commission Top agencies DOJ (Department of Justice)	$320,190	<0.1%	Rank history: not on the FY2021–FY2023 lists and #69 in FY2025; new.
88	Native Contractors, Inc. Top agencies VA (Department of Veterans Affairs)	$316,357	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
89	Herlong Public Utility District Top agencies DOJ (Department of Justice) Army (Department of the Army)	$310,367	<0.1%	Rank history: not on the FY2021 list, #60 in FY2022, #63 in FY2023 and not on the FY2025 list; down 26 since FY2023.
90	Filtration Technology, Inc. Top agencies DOI (Department of the Interior)	$310,038	<0.1%	Rank history: not on the FY2021–FY2023 lists and #93 in FY2025; up 55 since FY2023.
91	City of Redding Top agencies USDA (Department of Agriculture)	$296,666	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
92	City of Manchester Top agencies DOJ (Department of Justice)	$294,030	<0.1%	Rank history: #45 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; up 22 since FY2023.
93	Department of Water Resources Oregon Top agencies DOI (Department of the Interior)	$292,980	<0.1%	Rank history: not on the FY2021 list, #95 in FY2022, not on the FY2023 list and #78 in FY2025; returned.
94	DC Water & Sewer Authority Top agencies Smithsonian (Smithsonian Institution) CFPB (Consumer Financial Protection Bureau) Treasury (Department of the Treasury)	$286,293	<0.1%	Rank history: #64 in FY2021, #46 in FY2022, #71 in FY2023 and not on the FY2025 list; down 23 since FY2023.
95	Golden Relief Resources Ltd Top agencies USAF (Department of the Air Force)	$284,982	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
96	County of Brunswick Top agencies Army (Department of the Army)	$284,953	<0.1%	Rank history: not on the FY2021–FY2022 lists, #96 in FY2023 and not on the FY2025 list; unchanged since FY2023.
97	Hydro Service & Supplies Inc. 2 awardees Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$284,388	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 23 since FY2023.
98	JD Martin Construction Services Inc. Top agencies USDA (Department of Agriculture)	$283,500	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
99	East RIO Hondo Water Supply Corp Top agencies DHS (Department of Homeland Security)	$280,000	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 97 since FY2023.
100	Pearl Purity Water Solution LLC Top agencies DOI (Department of the Interior)	$279,577	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 30 since FY2023.

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100 of 638 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 22131

Code	Net obligations	Largest contractor
221310 Water Supply and Irrigation Systems	$623,372,176	American Water Works Company Inc.

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 $641 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 2024 ran Oct 1, 2023 – Sep 30, 2024. 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 FY2023. "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 FY2023 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 22131 contractors in FY2024?

1. American Water Works Company Inc. ($197M), 2. Fort Bliss Water Services Company ($75.8M), 3. Oklahoma City Water Utilities Trust ($35.7M), 4. Jacobs Government Services Company ($30.7M), 5. Fort Riley Utility Services, Inc. ($27.7M), 6. Old North Utility Services Inc. ($21.8M), 7. Emerald Coast Utility Services Inc. ($19M), 8. Washington Suburban Sanitary Commission ($16.7M), 9. Augusta-Richmond County Government ($14.2M), 10. American Water Enterprises, LLC ($13.9M).

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