Federal NAICS Codes

NAICS 221320: Sewage Treatment Facilities

Explore obligations, trends, recent awards, and incumbent contractors for NAICS 221320.

NAICS 221320 federal market metrics

Total obligations
$6.6B
Total awards
15,496 awards
Active obligations
$2.8B
Size standard
$35,000,000 receipts

What this NAICS covers

NAICS 221320 covers operation and maintenance of sewage treatment plants, wastewater treatment processes, sludge handling and disposal, process monitoring and control, and plant support services that maintain biological, chemical, and physical treatment performance.

Federal opportunities under 221320 typically involve providing continuous plant operations, operator staffing, compliance monitoring and reporting, preventive maintenance, process optimization, and turnkey operational support so agencies sustain permitted effluent quality and reliable wastewater treatment capacity.

FY2026 snapshot

Obligations
$91.3M
Awards
171
Average award
$533.8K
Change from FY2025
-8.4%

Recent awards

Search contractors

$26,897

John D Engineering Ltd.

Department of State

PIID
19BH2026P0229
PSC
Y1ND - CONSTRUCTION OF SEWAGE AND WASTE FACILITIES

$0

COUNTY OF LEE

Federal Prison System / Bureau of Prisons

PIID
15B11726F00000069
PSC
S114 - UTILITIES- WATER

$23,826

JET INC

Department of State

PIID
19RC1126P0085
PSC
J046 - MAINT/REPAIR/REBUILD OF EQUIPMENT- WATER PURIFICATION AND SEWAGE TREATMENT EQUIPMENT

FAQ

What work fits NAICS 221320?
  • Operate a wastewater treatment plant with certified operators, shift coverage, process control logs, permit sampling, and monthly discharge monitoring reports.
  • Provide sludge handling and disposal operations, including dewatering, hauling coordination, manifests, and documentation of disposal methods and volumes.
  • Manage treatment operations for an agency campus or facility, including influent screening, clarifiers, aeration, disinfection, effluent monitoring, and daily operating records.
  • Perform preventive maintenance and emergency response for treatment plant equipment when bundled with responsibility for ongoing plant operations and compliance.
When is NAICS 221320 a weak fit?
  • Design-build or major construction of new treatment capacity where the primary deliverable is a constructed facility rather than ongoing wastewater treatment operations.
  • Chemical or equipment supply-only procurements that provide consumables or replacement equipment without responsibility for operating the treatment facility.
  • On-site septic system installation for individual homes where centralized treatment plant design, large-scale process equipment, and sludge management are absent.
What solicitation language points to NAICS 221320?
  • Scope requires certified wastewater operators, daily plant coverage, process control logs, and responsibility for operating named treatment processes.
  • Performance requirements cite numeric effluent limits for BOD, TSS, nutrients, or regulatory permit sampling and reporting.
  • Deliverables include operating logs, laboratory results, sludge manifests, discharge monitoring reports, and corrective action documentation for permit compliance.

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