Top 100 Contractors in NAICS 2213: Water, Sewage and Other Systems, FY2021

Name: Top 100 Contractors in NAICS 2213: Water, Sewage and Other Systems, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 53% of FY2021 NAICS 2213 contract dollars

Contract obligations: $676,350,667 Net of deobligations, by contracts coded NAICS 2213 or a code under it
Contractors: 912 Parent companies with an obligation
Largest contractor: American Water Works Company Inc. $150 million, 20.9% 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. 11 awardees, including American Water Operations and Maintenance, LLC, American Water Military Services, LLC and Pennsylvania - American Water Company Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOJ (Department of Justice)	$149,705,459	20.9%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since FY2020.
2	Old North Utility Services Inc. 6 awardees, including Fort Bliss Water Services Company, Terrapin Utility Services, Inc. and Old Dominion Utility Services, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$63,498,523	8.9%	Rank history: #2 in FY2022, #2 in FY2023, #8 in FY2024 and not on the FY2025 list; up 1 since FY2020.
3	Foreign Utility Consolidated Reporting Top agencies Army (Department of the Army)	$39,848,537	5.6%	Rank history: #3 in FY2022, #3 in FY2023, #3 in FY2024 and #3 in FY2025; down 1 since FY2020.
4	Aqua Engineers Inc. Top agencies Army (Department of the Army)	$23,893,317	3.3%	Rank history: #4 in FY2022, #4 in FY2023, #6 in FY2024 and #9 in FY2025; unchanged since FY2020.
5	American Water Enterprises, LLC Top agencies Army (Department of the Army)	$18,935,203	2.6%	Rank history: #9 in FY2022, #11 in FY2023, #13 in FY2024 and #16 in FY2025; up 4 since FY2020.
6	Jacobs Engineering Group Inc. 2 awardees, including Ch2M Hill Constructors, Inc. and Jacobs Project Management Co Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$17,260,578	2.4%	Rank history: #6 in FY2022, #12 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
7	Veolia Water North America-West LLC 6 awardees, including Veolia Water West Operating Services Inc., Vicinity Energy Oklahoma City, LLC and Vicinity Energy Philadelphia Inc. Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico) GSA (General Services Administration) Treasury (Department of the Treasury)	$17,246,231	2.4%	Rank history: #7 in FY2022, #6 in FY2023, #22 in FY2024 and not on the FY2025 list; up 38 since FY2020.
8	Fort Riley Utility Services, Inc. Top agencies Army (Department of the Army)	$16,601,488	2.3%	Rank history: #5 in FY2022, #7 in FY2023, #7 in FY2024 and #15 in FY2025; unchanged since FY2020.
9	Emerald Coast Utility Services Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$15,706,337	2.2%	Rank history: #8 in FY2022, #8 in FY2023, #9 in FY2024 and #12 in FY2025; down 2 since FY2020.
10	Base Utilities Inc. Top agencies USAF (Department of the Air Force)	$15,250,054	2.1%	Rank history: #12 in FY2022, #13 in FY2023, #14 in FY2024 and #18 in FY2025; unchanged since FY2020.
11	Florida Governmental Utility Authority Top agencies USAF (Department of the Air Force)	$13,758,633	1.9%	Rank history: #14 in FY2022, #20 in FY2023, #21 in FY2024 and not on the FY2025 list; up 13 since FY2020.
12	Washington Suburban Sanitary Commission Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration) Smithsonian (Smithsonian Institution)	$13,272,974	1.9%	Rank history: #10 in FY2022, #10 in FY2023, #10 in FY2024 and #13 in FY2025; down 6 since FY2020.
13	Augusta-Richmond County Government Top agencies Army (Department of the Army)	$11,996,167	1.7%	Rank history: #11 in FY2022, #16 in FY2023, #12 in FY2024 and #10 in FY2025; unchanged since FY2020.
14	MX Construction, Inc. Top agencies Army (Department of the Army)	$10,830,173	1.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
15	Harford County, Maryland Top agencies Army (Department of the Army)	$7,363,710	1.0%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
16	Pural Water Specialty Co. , Inc. Top agencies Army (Department of the Army)	$7,062,849	1.0%	Rank history: #26 in FY2022, #17 in FY2023, #26 in FY2024 and #37 in FY2025; up 13 since FY2020.
17	Central Coast Water Authority Top agencies USAF (Department of the Air Force)	$6,890,542	1.0%	Rank history: #21 in FY2022, #18 in FY2023, #17 in FY2024 and #22 in FY2025; down 5 since FY2020.
18	Nikken Sogyo Co., Ltd. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$6,715,186	0.9%	Rank history: #18 in FY2022, #15 in FY2023, #19 in FY2024 and #19 in FY2025; down 2 since FY2020.
19	Government of the United States 2 awardees, including United States Department of the Air Force and General Services Administration Greater Southwest Finance Center (7Bc) Top agencies DOJ (Department of Justice)	$5,734,468	0.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
20	City of Aberdeen Top agencies Army (Department of the Army)	$5,436,271	0.8%	Rank history: #19 in FY2022, #19 in FY2023, #15 in FY2024 and #26 in FY2025; unchanged since FY2020.
21	Pyeongtaek-Si Water and Sewage Business Place Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$4,705,599	0.7%	Rank history: #28 in FY2022, #36 in FY2023, #40 in FY2024 and #30 in FY2025; up 1 since FY2020.
22	Hardin County Water District NO. 1 Top agencies Army (Department of the Army)	$4,379,153	0.6%	Rank history: #24 in FY2022, #25 in FY2023, #37 in FY2024 and not on the FY2025 list; down 3 since FY2020.
23	Riverbend Water Resources District Top agencies Army (Department of the Army)	$4,178,966	0.6%	Rank history: #20 in FY2022, #21 in FY2023, #16 in FY2024 and #20 in FY2025; unchanged since FY2020.
24	City of Terre Haute Top agencies DOJ (Department of Justice)	$3,860,506	0.5%	Rank history: #29 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
25	Perc Water Corporation Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$3,752,607	0.5%	Rank history: #23 in FY2022, #23 in FY2023, #24 in FY2024 and #25 in FY2025; up 18 since FY2020.
26	City of Atlanta Top agencies DOJ (Department of Justice) NARA (National Archives and Records Administration)	$3,716,402	0.5%	Rank history: #38 in FY2022, #78 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
27	Detroit Thermal, LLC Top agencies GSA (General Services Administration)	$3,631,292	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
28	County of Miami-Dade Through Miami-Dade Water & Sewer Dept Top agencies DOJ (Department of Justice) Army (Department of the Army)	$3,454,358	0.5%	Rank history: #25 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
29	Antelope Valley East Kern Water Agency Top agencies USAF (Department of the Air Force)	$3,204,210	0.4%	Rank history: #27 in FY2022, #30 in FY2023, #33 in FY2024 and #40 in FY2025; up 9 since FY2020.
30	Bundesministerium FÜR Umwelt, Naturschutz UND Reaktorsicherheit Top agencies Army (Department of the Army)	$3,179,289	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
31	California Water Service Group Through California Water Service Co Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DCMA (Defense Contract Management Agency)	$3,146,997	0.4%	Rank history: #47 in FY2022, #33 in FY2023, #28 in FY2024 and #41 in FY2025; up 29 since FY2020.
32	Autoridad DE Acueductos Y Alcantarillados DE PR Top agencies DOJ (Department of Justice)	$3,090,100	0.4%	Rank history: #80 in FY2022, #40 in FY2023 and not on the FY2024–FY2025 lists; up 111 since FY2020.
33	Fayetteville City of Through Fayetteville Public Works Commission Top agencies Army (Department of the Army)	$3,025,180	0.4%	Rank history: #34 in FY2022, #39 in FY2023, #41 in FY2024 and not on the FY2025 list; up 6 since FY2020.
34	South Granville Water & Sewer Auth Top agencies DOJ (Department of Justice)	$2,847,712	0.4%	Rank history: #31 in FY2022, #28 in FY2023, #31 in FY2024 and #32 in FY2025; up 3 since FY2020.
35	City of Hopewell Through City of Hopewell Hrwtf Top agencies DOJ (Department of Justice)	$2,762,732	0.4%	Rank history: #51 in FY2022, #91 in FY2023 and not on the FY2024–FY2025 lists; up 325 since FY2020.
36	Bundesministerium FUR Umwelt Naturschutz UND Reaktorsicherheit Through Bundesministerium FÜR Umwelt, Naturschutz UND Reaktorsicherheit Top agencies Army (Department of the Army)	$2,752,399	0.4%	Rank history: not on the FY2022–FY2025 lists; up 126 since FY2020.
37	Griffiss Utility Services Corporation Top agencies USAF (Department of the Air Force)	$2,649,375	0.4%	Rank history: #71 in FY2022, #47 in FY2023, #52 in FY2024 and #68 in FY2025; up 58 since FY2020.
38	New York City of 2 awardees, including New York City Water Board Top agencies DOJ (Department of Justice) SSA (Social Security Administration) Smithsonian (Smithsonian Institution)	$2,600,524	0.4%	Rank history: #30 in FY2022, #55 in FY2023 and not on the FY2024–FY2025 lists; up 25 since FY2020.
39	Jungbu Water Supply Office Top agencies Army (Department of the Army)	$2,392,200	0.3%	Rank history: #40 in FY2022, #48 in FY2023, #50 in FY2024 and #51 in FY2025; up 7 since FY2020.
40	City of Wildwood City Hall Top agencies DOJ (Department of Justice)	$2,361,013	0.3%	Rank history: #41 in FY2022, #50 in FY2023, #42 in FY2024 and #33 in FY2025; up 8 since FY2020.
41	Harnett, County of North Carolina Top agencies Army (Department of the Army)	$2,283,959	0.3%	Rank history: #65 in FY2022, #37 in FY2023, #38 in FY2024 and #45 in FY2025; up 11 since FY2020.
42	LOS Angeles Department of Water and Power Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs)	$2,243,356	0.3%	Rank history: not on the FY2022–FY2025 lists; up 134 since FY2020.
43	Optech-Monette, LLC Top agencies USAF (Department of the Air Force)	$2,142,680	0.3%	Rank history: #33 in FY2022, #31 in FY2023, #35 in FY2024 and #46 in FY2025; up 25 since FY2020.
44	City of Aliceville Top agencies DOJ (Department of Justice)	$2,096,338	0.3%	Rank history: #69 in FY2022, #53 in FY2023, #53 in FY2024 and #58 in FY2025; down 2 since FY2020.
45	City of Florence Top agencies DOJ (Department of Justice)	$2,047,083	0.3%	Rank history: #46 in FY2022, not on the FY2023 list, #46 in FY2024 and #57 in FY2025; up 16 since FY2020.
46	Johnson Controls Security Solutions LLC 4 awardees, including Johnson Controls Government Systems, LLC and Johnson Controls Navy Systems, LLC Top agencies DOE (Department of Energy) DLA (Defense Logistics Agency)	$2,026,652	0.3%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
47	Town of Pollock Top agencies DOJ (Department of Justice)	$1,988,526	0.3%	Rank history: #56 in FY2022, #85 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
48	Beckley Sanitary Board Top agencies DOJ (Department of Justice) DOL (Department of Labor) VA (Department of Veterans Affairs)	$1,951,062	0.3%	Rank history: #43 in FY2022, #43 in FY2023 and not on the FY2024–FY2025 lists; up 25 since FY2020.
49	Northeast Ohio Regional Sewer District Top agencies NASA (National Aeronautics and Space Administration)	$1,827,210	0.3%	Rank history: #58 in FY2022, #46 in FY2023, #48 in FY2024 and #50 in FY2025; up 1 since FY2020.
50	City of Victorville Top agencies DOJ (Department of Justice)	$1,799,190	0.3%	Rank history: #35 in FY2022, #72 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
51	Raleigh County Public Service District Top agencies DOJ (Department of Justice) DOL (Department of Labor)	$1,797,360	0.3%	Rank history: #52 in FY2022, #57 in FY2023 and not on the FY2024–FY2025 lists; up 28 since FY2020.
52	City of Beaumont Top agencies DOJ (Department of Justice)	$1,738,937	0.2%	Rank history: #55 in FY2022 and not on the FY2023–FY2025 lists; up 5 since FY2020.
53	Southern Aire Contracting, Inc. Top agencies USAF (Department of the Air Force)	$1,716,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
54	Municipality of Anchorage Top agencies USAF (Department of the Air Force)	$1,704,783	0.2%	Rank history: #32 in FY2022, #35 in FY2023, #36 in FY2024 and #42 in FY2025; up 43 since FY2020.
55	City of Fort Worth 2 awardees Top agencies DOJ (Department of Justice) Treasury (Department of the Treasury) Army (Department of the Army)	$1,628,945	0.2%	Rank history: #60 in FY2022, #51 in FY2023 and not on the FY2024–FY2025 lists; up 54 since FY2020.
56	DCS Infrastructure, LLC Top agencies VA (Department of Veterans Affairs)	$1,597,071	0.2%	Rank history: #57 in FY2022, #58 in FY2023, #47 in FY2024 and #86 in FY2025; up 33 since FY2020.
57	Krätz GMBH Top agencies Army (Department of the Army)	$1,587,179	0.2%	Rank history: #37 in FY2022, #38 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
58	National O & M, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$1,565,150	0.2%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
59	Fairbanks Sewer & Water, Inc. Through Golden Heart Utilities, Inc. Top agencies Army (Department of the Army)	$1,564,737	0.2%	Rank history: #45 in FY2022, #41 in FY2023, #43 in FY2024 and not on the FY2025 list; up 12 since FY2020.
60	Schwarz Construction Llc-K Hayes Limited Joint Venture Top agencies Army (Department of the Army)	$1,519,493	0.2%	Rank history: #53 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
61	City of Atwater Top agencies DOJ (Department of Justice)	$1,497,551	0.2%	Rank history: #67 in FY2022, #67 in FY2023 and not on the FY2024–FY2025 lists; up 17 since FY2020.
62	City of Milan Top agencies DOJ (Department of Justice)	$1,481,552	0.2%	Rank history: #39 in FY2022, #66 in FY2023 and not on the FY2024–FY2025 lists; up 29 since FY2020.
63	Western Municipal Water District of Riverside County Top agencies VA (Department of Veterans Affairs)	$1,478,337	0.2%	Rank history: #50 in FY2022 and not on the FY2023–FY2025 lists; up 29 since FY2020.
64	State of Hawaii 3 awardees, including Agribusiness Development Corporation and Department of Transportation State of Hawaii Top agencies Navy (Department of the Navy) DOJ (Department of Justice)	$1,396,921	0.2%	Rank history: #79 in FY2022 and not on the FY2023–FY2025 lists; up 40 since FY2020.
65	Public Service Commission of Yazoo City Top agencies DOJ (Department of Justice)	$1,393,081	0.2%	Rank history: #78 in FY2022 and not on the FY2023–FY2025 lists; up 20 since FY2020.
66	City of Leavenworth 2 awardees, including City of Leavenworth KS Top agencies DOJ (Department of Justice) Army (Department of the Army)	$1,329,797	0.2%	Rank history: #62 in FY2022, #29 in FY2023, #55 in FY2024 and #71 in FY2025; up 44 since FY2020.
67	Columbiana County Top agencies DOJ (Department of Justice)	$1,323,856	0.2%	Rank history: not on the FY2022–FY2023 lists, #83 in FY2024 and #90 in FY2025; up 72 since FY2020.
68	Dublin San Ramon Services District Top agencies DOJ (Department of Justice)	$1,287,219	0.2%	Rank history: #82 in FY2022 and not on the FY2023–FY2025 lists; up 18 since FY2020.
69	Evoqua Water Technologies LLC 4 awardees Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,259,442	0.2%	Rank history: #88 in FY2022 and not on the FY2023–FY2025 lists; up 69 since FY2020.
70	San Antonio River Authority Top agencies USAF (Department of the Air Force)	$1,250,528	0.2%	Rank history: #70 in FY2022, #56 in FY2023, #98 in FY2024 and #100 in FY2025; up 11 since FY2020.
71	City of Tucson Top agencies DOJ (Department of Justice)	$1,212,868	0.2%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
72	Texas Water Utilities, L.P. Top agencies DOJ (Department of Justice)	$1,194,167	0.2%	Rank history: #74 in FY2022 and not on the FY2023–FY2025 lists; up 11 since FY2020.
73	City of Danbury CT Top agencies DOJ (Department of Justice)	$1,110,000	0.2%	Rank history: #91 in FY2022, #93 in FY2023, #86 in FY2024 and #98 in FY2025; up 2 since FY2020.
74	Mccreary County Water District Top agencies DOJ (Department of Justice)	$1,075,876	0.2%	Rank history: #73 in FY2022, #65 in FY2023 and not on the FY2024–FY2025 lists; up 33 since FY2020.
75	Gregg Township Municipal Authority Top agencies DOJ (Department of Justice)	$1,070,187	0.1%	Rank history: #90 in FY2022, #79 in FY2023, #64 in FY2024 and #85 in FY2025; up 33 since FY2020.
76	Village of Saranac Lake Top agencies DOJ (Department of Justice)	$1,040,000	0.1%	Rank history: #72 in FY2022, #76 in FY2023, #69 in FY2024 and #83 in FY2025; up 30 since FY2020.
77	Gilmer County Public Service District Top agencies DOJ (Department of Justice)	$1,019,116	0.1%	Rank history: #83 in FY2022 and not on the FY2023–FY2025 lists; up 50 since FY2020.
78	Stan Limited Top agencies DOS (Department of State)	$991,703	0.1%	Rank history: not on the FY2022–FY2025 lists; up 202 since FY2020.
79	City of Manchester Top agencies DOJ (Department of Justice)	$981,000	0.1%	Rank history: not on the FY2022–FY2023 lists, #97 in FY2024 and not on the FY2025 list; up 44 since FY2020.
80	City of Jesup Top agencies DOJ (Department of Justice)	$956,845	0.1%	Rank history: #95 in FY2022 and not on the FY2023–FY2025 lists; up 55 since FY2020.
81	Anchorage Municipality of (9987) Top agencies USAF (Department of the Air Force)	$956,776	0.1%	Rank history: not on the FY2022–FY2025 lists; up 34 since FY2020.
82	Herlong Public Utility District Top agencies DOJ (Department of Justice) Army (Department of the Army)	$916,970	0.1%	Rank history: #92 in FY2022, #84 in FY2023, #73 in FY2024 and #77 in FY2025; up 37 since FY2020.
83	Lee County VA Through County of Lee Top agencies DOJ (Department of Justice)	$909,840	0.1%	Rank history: #98 in FY2022, #86 in FY2023, #66 in FY2024 and not on the FY2025 list; up 137 since FY2020.
84	City of Talladega Top agencies DOJ (Department of Justice)	$899,403	0.1%	Rank history: #86 in FY2022, #82 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
85	Preston County Public Service District NO4 Top agencies DOJ (Department of Justice)	$885,581	0.1%	Rank history: #85 in FY2022, #92 in FY2023, #74 in FY2024 and #76 in FY2025; up 29 since FY2020.
86	Sanitation Dist 4 Inc. Top agencies DOJ (Department of Justice)	$874,794	0.1%	Rank history: #68 in FY2022, #45 in FY2023 and not on the FY2024–FY2025 lists; up 44 since FY2020.
87	City of Welch Top agencies DOJ (Department of Justice)	$874,496	0.1%	Rank history: #87 in FY2022, #77 in FY2023, #65 in FY2024 and #82 in FY2025; up 50 since FY2020.
88	Old Dominion Utility Services, Inc. Top agencies Army (Department of the Army)	$858,268	0.1%	Rank history: not on the FY2022–FY2025 lists; down 61 since FY2020.
89	Edgefield County Water & Sewer Authority Top agencies DOJ (Department of Justice)	$854,070	0.1%	Rank history: #81 in FY2022, #74 in FY2023 and not on the FY2024–FY2025 lists; up 52 since FY2020.
90	City of Greenville Top agencies DOJ (Department of Justice)	$853,479	0.1%	Rank history: #97 in FY2022, #83 in FY2023, #80 in FY2024 and not on the FY2025 list; up 42 since FY2020.
91	Clear Lake City Water Authority Top agencies NASA (National Aeronautics and Space Administration)	$843,528	0.1%	Rank history: not on the FY2022 list, #75 in FY2023, #39 in FY2024 and #81 in FY2025; down 4 since FY2020.
92	City of Portland Top agencies VA (Department of Veterans Affairs)	$783,370	0.1%	Rank history: not on the FY2022–FY2025 lists; up 124 since FY2020.
93	Texarkana Water Utilities Top agencies DOJ (Department of Justice)	$769,697	0.1%	Rank history: not on the FY2022 list, #89 in FY2023 and not on the FY2024–FY2025 lists; up 60 since FY2020.
94	Town of North Hempstead Town Hall Through Town of North Hempstead Top agencies DOT (Department of Transportation)	$757,254	0.1%	Rank history: #100 in FY2022, #96 in FY2023, #68 in FY2024 and not on the FY2025 list; up 56 since FY2020.
95	Williamsburg County Top agencies DOJ (Department of Justice)	$741,934	0.1%	Rank history: not on the FY2022–FY2025 lists; up 49 since FY2020.
96	Board of Water Commissioners of Columbus Top agencies Army (Department of the Army)	$732,115	0.1%	Rank history: not on the FY2022 list, #26 in FY2023, #58 in FY2024 and #69 in FY2025; down 60 since FY2020.
97	Sheridan City of Through City of Sheridan Top agencies DOJ (Department of Justice)	$721,620	0.1%	Rank history: #75 in FY2022, #73 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
98	CPF LLC Top agencies USDA (Department of Agriculture)	$716,623	0.1%	Rank history: not on the FY2022 list, #71 in FY2023, #18 in FY2024 and not on the FY2025 list; down 66 since FY2020.
99	Sungro Products LLC Top agencies HHS (Department of Health and Human Services) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$708,572	0.1%	Rank history: not on the FY2022–FY2025 lists; up 21 since FY2020.
100	City of Philadelphia 2 awardees, including City of Philadelphia Department of Revenue Water Revenue Bureau B0610658047 and Philadelphia Water Department Top agencies Treasury (Department of the Treasury) DOJ (Department of Justice) SSA (Social Security Administration)	$704,527	0.1%	Rank history: not on the FY2022–FY2025 lists; up 163 since FY2020.

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100 of 912 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 2213

Code	Net obligations	Largest contractor
22131 Water Supply and Irrigation Systems	$486,152,030	American Water Works Company Inc.
22132 Sewage Treatment Facilities	$151,434,630	Aqua Engineers Inc.
22133 Steam and Air-Conditioning Supply	$38,764,008	Foreign Utility Consolidated Reporting

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 $716 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.

Quick answers

Who were the top 10 NAICS 2213 contractors in FY2021?

1. American Water Works Company Inc. ($150M), 2. Old North Utility Services Inc. ($63.5M), 3. Foreign Utility Consolidated Reporting ($39.8M), 4. Aqua Engineers Inc. ($23.9M), 5. American Water Enterprises, LLC ($18.9M), 6. Jacobs Engineering Group Inc. ($17.3M), 7. Veolia Water North America-West LLC ($17.2M), 8. Fort Riley Utility Services, Inc. ($16.6M), 9. Emerald Coast Utility Services Inc. ($15.7M), 10. Base Utilities Inc. ($15.3M).

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