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NAICS Code· 221320

Sewage Treatment Facilities

This industry comprises establishments primarily engaged in operating sewer systems or sewage treatment facilities that collect, treat, and dispose of waste. Cross-References. Establishments primarily engaged in--Show more

NAICS 221320 – Sewage Treatment Facilities encompasses the design, construction, operation, maintenance, and upgrade of wastewater treatment infrastructure, including activated sludge systems, trickling filters, anaerobic digesters, disinfection units, and biosolids handling facilities. This sector supports critical public health and environmental compliance efforts by ensuring municipal and industrial effluent meets Clean Water Act standards before discharge.

62
Active Contracts
$92.6M
Total Obligations (12mo)
171
Awarded Contracts (12mo)
92
Contractors Awarded (12mo)
+4.4%
YoY Growth

Industry Spending Overview

Federal obligations, top contractors and agencies, and related industry codes for NAICS 221320.

AI Industry Description

NAICS 221320 – Sewage Treatment Facilities encompasses the design, construction, operation, maintenance, and upgrade of wastewater treatment infrastructure, including activated sludge systems, trickling filters, anaerobic digesters, disinfection units, and biosolids handling facilities. This sector ...

NAICS 221320 – Sewage Treatment Facilities encompasses the design, construction, operation, maintenance, and upgrade of wastewater treatment infrastructure, including activated sludge systems, trickling filters, anaerobic digesters, disinfection units, and biosolids handling facilities. This sector supports critical public health and environmental compliance efforts by ensuring municipal and industrial effluent meets Clean Water Act standards before discharge. In government contracting, this NAICS is integral to infrastructure resilience programs, particularly where military installations, federal facilities, and tribal lands require decentralized or upgraded sanitation systems to meet regulatory and operational demands. Work under this code often involves civil engineering, hydraulic modeling, process control automation, and environmental permitting, positioning it at the intersection of environmental engineering and federal infrastructure investment. Top contractors in this sector include C-A Native Constructors Inc. and Kleinfelder, Inc., both of which bring specialized expertise in civil construction and environmental engineering. C-A Native Constructors Inc. operates as a small business with strong capabilities in tribal and remote site projects, while Kleinfelder, Inc. functions as a large prime with multidisciplinary teams experienced in complex wastewater system design and federal compliance. The competitive landscape is characterized by a mix of small disadvantaged businesses and established engineering firms with proven track records in federal environmental infrastructure. The Department of Defense is the primary agency awarding contracts under this NAICS, driven by mandates to modernize aging sewer systems at military bases, comply with EPA effluent guidelines, and support installation sustainability goals. Projects often align with the Defense Environmental Restoration Program and Base Realignment and Closure initiatives. The market presents steady opportunity density, particularly for contractors with expertise in nutrient removal, energy-efficient treatment processes, and decentralized systems. Demand is increasingly shaped by climate resilience, water reuse initiatives, and the need for automated, low-maintenance facilities in remote or high-risk locations.

Top Contractors

Companies with the highest total award value under NAICS 221320, ranked by dollars won.

Ranked by total awards
CompanyTotal AwardsContracts
SUNSTATE ENVIRONMENTAL SERVICES INC$17.5M1
VEOLIA WATER WEST OPERATING SERVICES INC$16.5M1
BAIRCO CONSTRUCTION INC$11.6M1
FOREIGN UTILITY CONSOLIDATED REPORTING$5.3M1
RIVERBEND WATER RESOURCES DISTRICT$5.0M2
KLJ SERVICES LLC$4.5M1
SOUTH GRANVILLE WATER & SEWER AUTH$4.2M1
NIKKEN SOGYO CO., LTD.$3.3M3
TAMA CITY HALL$2.2M1
OPTECH-MONETTE, LLC$1.8M1

Top Agencies

Federal agencies directing the most contract spending toward NAICS 221320.

Department Of State18 awards$34.4M
Department Of Defense59 awards$29.2M
Department Of Justice61 awards$14.0M
Department Of The Interior12 awards$12.9M
Department Of Transportation1 award$1.1M
Department Of Agriculture7 awards$481K
Department Of Veterans Affairs3 awards$367K
Department Of The Treasury4 awards$89K
Department Of Health And Human Services1 award$82K
Department Of Homeland Security2 awards$22K

Related NAICS Codes

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NAICS 221320 FAQ

Frequently Asked Questions

NAICS code 221320 covers Sewage Treatment Facilities. This industry comprises establishments primarily engaged in operating sewer systems or sewage treatment facilities that collect, treat, and dispose of waste. Cross-References. Establishments primarily engaged in--

Recently Posted in Sewage Treatment Facilities

NAICS: 221320
New
SLED
Wastewater Billing Meter AssessmentsThe City of Austin, through Austin Water, is seeking proposals to assess and improve wastewater billing meters as part of a broader initiative to address aging and deteriorating wastewater infrastructure. This solicitation, identified as IFB 6100 CLMC1171, was posted on July 13, 2026, with a response deadline of August 13, 2026, at 7:00 PM. The project focuses on evaluating the current condition of metering systems to ensure accurate billing and operational efficiency while supporting long-term infrastructure resilience. All work is expected to be performed within the jurisdiction of the City of Austin, with no specific set-aside provisions indicated for small, minority, or disadvantaged businesses. Primary points of contact for the solicitation include Atha Phillips for general project inquiries, Olga Jimenez for solicitation-specific questions, and Veronica Hawkins for inquiries related to small and minority business resources. Further details and documentation can be accessed through the City’s online finance portal.
City of Austin

POSTED

1 day ago

DEADLINE

in about 1 month
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NAICS: 221320
Closed
Federal
30--REPLACE LIFT STATION PUMPS AT HOZHO PT.The contract is for the replacement of lift station pumps at Hozho Point within Petrified Forest National Park, specifically at 1 Park Rd, Petrified Forest, AZ 86028, under solicitation number 140P1526Q0101 issued as a Request for Quote on SF 1442 using Simplified Acquisition Procedures per FAR Part 13. The work entails replacing two existing Goulds 1 horsepower grinder pumps with Barnes OGP 2hp grinder pumps or equal, verifying wastewater flow through the force main sewer line from Painted Desert Inn to the Community Complex main line, cleaning, rebuilding, or replacing check valves at Hozho Point and at the connection between the Hozho Point and Painted Desert Inn force mains, and inspecting, repairing, or replacing electrical components including circuit breakers, disconnect switches, and lift station well floats. The contractor must provide all labor, materials, tools, equipment, and supervision necessary to complete the work under a Firm Fixed Price contract, with performance beginning within 10 to 15 calendar days of receiving the notice to proceed and completion required within 60 calendar days, inclusive of final site cleanup. A detailed progress chart indicating scheduled work percentages must be submitted within five days of work commencement. The contract requires compliance with applicable OSHA, environmental, and safety regulations, with the Park Safety Officer empowered to issue cease-and-desist orders for unsafe practices. All accidents involving injury, death, or property damage must be reported immediately to the Contracting Officer. The solicitation requires offerors to maintain an active SAM registration with a valid Unique Entity Identifier, and to comply with mandatory representations and certifications including those related to independent price determination, prohibitions on influencing federal transactions, internal confidentiality agreements, and restrictions on business operations in Sudan and Iran. Submission of quotes must be made via email to Donald_Tremble@ios.doi.gov by the deadline of July 13, 2026, with no alternative submission methods accepted. Past performance documentation, including up to five questionnaires for projects completed within the last five years, and a completed technical questionnaire are required. The award will be made based on best value, considering price, technical capability, and past performance, though specific weights are not disclosed due to simplified acquisition rules. Payment will be processed electronically through the Treasury’s IPP system, requiring vendor invoices in PDF format and supporting documentation. Final payment is contingent upon submission of payrolls, SF 1413 statements for
Imr ARIZONA(12400)

POSTED

1 day ago

CLOSED

about 19 hours ago
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NAICS: 221320
New
SLED
Emergency Water Pipe Repair ServicesSan Diego County is seeking subcontractor services to perform emergency repairs on an existing water pipeline located at the intersection of Highway 76 and Mission Road in Bonsall, California, within a pre-established easement. The scope of work includes excavation, replacement or rehabilitation of the damaged pipeline segment, pressure testing to ensure integrity, and full restoration of the site to its original condition. All activities must comply with local regulations and be conducted within the confines of the existing easement to minimize disruption. The contract is classified under NAICS code 221320 for water supply and irrigation systems, and the work is expected to be performed in the 92003 ZIP code area. The solicitation was posted on July 13, 2026, and remains open for qualified subcontractors to respond.
San Diego County

POSTED

1 day ago

DEADLINE

N/A
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NAICS: 221320
New
Canada
W684Q-241334 - Pumping EffluentThe Government of Canada, through the Department of Public Works and Government Services, is soliciting bids for the complete provision of labour, tools, materials, equipment, and transportation services required to pump and transport effluent from a variety of sources including septic tanks, lift stations, grease traps, above and below ground holding tanks, and ship holding tanks across multiple locations in British Columbia. The work will primarily serve the Department of National Defence at CFB Esquimalt in Victoria and also include Ranch Point, Winchelsea Island, Nanoose Bay, and Nanaimo. In addition to effluent pumping, offerors must provide hydro excavation trucks to support the operations, ensuring all services are delivered safely and in compliance with environmental and operational standards. Proposals are due by July 21, 2026, with the solicitation published on July 13, 2026, under the solicitation number WS4748092247 and NAICS code 221320. The contract falls under federal procurement and is open to all eligible offerors without specific set-aside provisions. The primary point of contact for inquiries is Nicki Arrieta, Contracting Authority, reachable via email at nicki.arrieta@tpsgc-pwgsc.gc.ca. All performance activities will take place within the province of British Columbia, and successful bidders will be expected to manage logistics, regulatory compliance, and operational readiness across these dispersed sites.
Department of Public Works and Government Services

POSTED

1 day ago

DEADLINE

in 7 days
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NAICS: 221320
New
SLED
Sewer Line Chemical Root Control Services for the City of ChattanoogaThe City of Chattanooga Wastewater Department is seeking a four-year contract for Sewer Line Chemical Root Control Services, with the solicitation posted on July 12, 2026, and responses due by July 27, 2026. This procurement aims to secure a vendor capable of providing ongoing chemical treatments to manage and prevent root infiltration in the city’s sewer line infrastructure, ensuring system integrity and operational efficiency. The work will be performed within Tennessee, specifically serving the City of Chattanooga’s wastewater system, and the contract is open to qualified suppliers without specific set-aside requirements. All proposals must be submitted by the deadline, and inquiries should be directed to Robin L. Powell, the designated buyer, via email at rpowell@chattanooga.gov. The contract will be managed under the City of Chattanooga Business Unit, with the solicitation number 200969 and accessible online through the provided procurement portal.
City of Chattanooga Business Unit

POSTED

3 days ago

DEADLINE

in 13 days
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NAICS: 221320
New
SLED
Water Supply and Fireflow System DesignThe contract titled Water Supply and Fireflow System Design requires the design and implementation of a reliable water supply system specifically tailored to meet firefighting needs, with a strong emphasis on system redundancy and compliance with required flow rates. The scope focuses on ensuring continuous and adequate water availability under emergency conditions, incorporating engineering standards that guarantee performance even during peak demand or equipment failure. The system must be designed to sustain fire suppression operations without interruption, addressing infrastructure resilience and regulatory adherence for fire safety in the designated area. The work is scoped for performance in ZIP code 92230 under the authority of Riverside County in California, with the North American Industry Classification System code 221320 indicating it falls within the water supply and irrigation systems sector. This is structured as a subcontract, though no solicitation number or point of contact is provided, and the agreement is posted with a date of July 10, 2026. The project does not specify a set-aside type or organizational classification, focusing solely on technical execution. Interested parties are directed to the provided URL for additional project details, though the full terms and eligibility criteria are not outlined here.
Riverside County

POSTED

4 days ago

DEADLINE

N/A
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NAICS: 221320
New
SLED
Field Deployment and Maintenance of Pilot Treatment UnitsThe contract encompasses the full lifecycle of mobile pilot treatment units deployed at Well 59 in Perris, California, requiring the contractor to install, operate, and maintain these systems to support water treatment evaluation and performance testing. Key responsibilities include continuous system monitoring, precise flow control, and the execution of scheduled media sampling to ensure data integrity and compliance with operational benchmarks. The work is critical for assessing treatment efficacy under real-world conditions and must be carried out with reliability and precision to support broader water quality initiatives. The contract is classified under NAICS code 221320 and is structured as a subcontract, with performance tied to the specific location at Well 59 in ZIP code 92571. The Eastern Municipal Water District in California is the organizing entity, and while no set-aside type or point of contact is specified, the posting date indicates the opportunity was made available in mid-2026. All activities must align with the district’s operational standards and regulatory requirements, with the contractor expected to deliver consistent, scalable solutions that facilitate data-driven decision-making for water treatment infrastructure.
Eastern Municipal Water District

POSTED

4 days ago

DEADLINE

N/A
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NAICS: 221320
New
Canada
W6898-270819-RISO – Water-Sewage Plant Control and Monitoring - DND Gagetown, NBPublic Service and Procurement Canada, acting on behalf of the Department of National Defence at CFB Gagetown in New Brunswick, is seeking qualified Canadian suppliers and suppliers from applicable trading partners to establish a Regional Individual Standing Offer for the maintenance and repair of process control and monitoring systems at the A-13 Water Treatment Plant and N-5 Base Sewage Treatment Plant. The scope of work includes providing all necessary labour, materials, tools, equipment, supervision, and transportation to ensure the reliable operation of these critical systems. The standing offer, valid for two years from October 1, 2026, to September 30, 2028, will support ongoing operational readiness by addressing maintenance needs as they arise across both facilities. Proposals must be submitted by August 5, 2026, and may be provided in either English or French, in accordance with Canada’s official languages policy. The solicitation, identified as WS5780602054, is open exclusively to eligible Canadian and partner nation suppliers, with Gary Bryant of Public Works and Government Services Canada serving as the primary contracting authority.
Department of Public Works and Government Services

POSTED

5 days ago

DEADLINE

in 22 days
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NAICS: 221320
New
SLED
WESTERN VIRGINIA WATER AUTHORITY HAS AN INVITATION TO BID FOR MB NITRIFIERS – BACTERIA FOR NITRIFICATION OR APPROVED EQUAL. SPECIFICATIONS ARE ATTACHED UNDER DOCUMENTS.The Western Virginia Water Authority is soliciting bids for MB Nitrifiers – bacteria designed for nitrification or an approved equal product, with detailed specifications provided in the attached documents. The solicitation, identified by number QQ-124030, was posted on July 9, 2026, and bids must be submitted by 3:00 PM ET on July 22, 2026. The contract is targeted for performance at the authority’s facility located at 1502 Brownlee Ave. SE, Roanoke, Virginia. This is a state and local government procurement under the SLED classification with no set-aside designation, allowing broad eligibility for qualified vendors. All inquiries and submissions should be directed to Diane Waldron, the designated point of contact, via email at diane.waldron@westernvawater.org or by phone at 540-283-8282. Further information and the official bidding platform can be accessed through the provided vendor portal link.
Western Virginia Water Authority

POSTED

5 days ago

DEADLINE

in 8 days
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NAICS: 221320
New
SLED
WWTF Mechanical Services FY27The Town of North Attleborough, Massachusetts, is soliciting contracted mechanical services for Fiscal Year 2027 under solicitation number 27-440-045, with a response deadline of July 23, 2026. The contract, managed by the Department of Public Works – Sewer, requires a contractor to provide routine and emergency electrical and mechanical maintenance and repair services for wastewater treatment facilities and collection systems. Work includes repair and installation of pumps, valves, piping, mixers, process controls, and dewatering equipment, with all labor, materials, equipment, and supplies furnished by the contractor. Services are structured around crew configurations—two-person and three-person crews—available during standard business hours (7:00 AM to 3:00 PM, Monday through Friday) and off-hours, including weekends and holidays, billed on an hourly basis. The contract has a maximum allowable value of $100,000 without amendment and operates under a prevailing wage framework tied to Massachusetts Department of Labor and Workforce Development requirements. Bidders must demonstrate at least ten years of active experience in mechanical contracting under the same business structure and comply with stringent insurance requirements, including $3,000,000 in property damage liability, $1,000,000 in contractual liability coverage, and $3,000,000 in comprehensive automobile liability, with the Town named as an additional insured. All workers must have completed a 10-hour OSHA-approved safety course prior to site entry, and documentation must accompany the first certified payroll report. The contractor is required to submit performance and payment bonds equal to 100% of the contract value, issued by a qualified surety, and maintain compliance with Massachusetts General Laws, including prevailing wage, affirmative action, and debarment statutes. Payment is processed monthly based on detailed invoices specifying work performed, location, date, authorizing party, work order, crew costs, materials, and equipment rentals, with a 5% retention applied. Equipment rentals are marked up 10%, and materials up to 15%, with prior written approval necessary. The contract runs from the date of signing through June 30, 2027, and includes provisions for termination with ten days’ notice for convenience or seven days’ notice for default, as well as indemnification, waiver of claims upon final payment, and delivery of as-built documentation. Bids must be submitted electronically
DPW - Sewer

POSTED

5 days ago

DEADLINE

in 9 days
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NAICS: 221320
New
SLED
Annual Maintenance Service for DynaSand® Filter SystemAn annual maintenance service is required for the DynaSand® Filter system identified as P01501757, encompassing a comprehensive inspection, thorough cleaning, measurement of sand levels, adjustment of reject flow settings, and maintenance of the control panel’s air filter, all conducted in strict accordance with the manufacturer’s operating manual. This service must be completed once per year to ensure the system operates at peak efficiency and complies with OEM standards. The contract is classified as a subcontract under NAICS code 221320, issued by the Public Utilities organization in Florida, with a posted date of July 9, 2026, and a response deadline of July 16, 2026. While specific location details for performance or contact information are not provided, the work is expected to be carried out at the facility housing the filtered system, and interested parties must submit their proposals before the specified deadline to be considered for award.
Public Utilities

POSTED

5 days ago

DEADLINE

in 2 days
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NAICS: 221320
New
SLED
Annexation No. 305 to the County Sanitation District No. 15 of Los Angeles CountyThe contract pertains to Annexation No. 305 to the County Sanitation District No. 15 of Los Angeles County, authorizing the provision of off-site sewage disposal services under the jurisdiction of the Los Angeles County Local Agency Formation Commission. The action is forecasted and planned to expand sanitation infrastructure services to accommodate growth or regulatory requirements within the unincorporated areas of Los Angeles, California. The point of contact for this matter is Paul Novak, Executive Officer, who can be reached via email or phone for further inquiries regarding the scope, implementation, or timeline of the annexation. The services will be performed within Los Angeles, California, and the related project details can be accessed through the provided California Environmental Quality Act online portal.
Los Angeles County Local Agency Formation Commission

POSTED

5 days ago

DEADLINE

N/A
View Details

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