This industry comprises establishments primarily engaged in operating sewer systems or sewage treatment facilities that collect, treat, and dispose of waste.
International Boundary and Water Commission: US-Mexico · California · Due January 6, 2027
What NAICS 221320 covers
This industry comprises establishments primarily engaged in operating sewer systems or sewage treatment facilities that collect, treat, and dispose of waste.
Not in this code
Establishments primarily engaged in operating waste treatment or disposal facilities (except sewer systems or sewage treatment facilities) are classified in Industry 56221, Waste Treatment and Disposal.
Establishments primarily engaged in operating water treatment plants and/or operating water supply systems are classified in Industry 221310, Water Supply and Irrigation Systems.
Establishments primarily engaged in pumping (i.e., cleaning) cesspools, portable toilets, and septic tanks or renting portable toilets are classified in U.S. Industry 562991, Septic Tank and Related Services.
Establishments primarily engaged in cleaning and rodding sewers and catch basins are classified in U.S. Industry 562998, All Other Miscellaneous Waste Management Services.
SBA size standard
A business is small under NAICS 221320 if it has no more than $35 million in average annual receipts (averaged over the last five completed fiscal years, including affiliates).
Source: SBA Table of Size Standards, effective 2023-03-17. Always check the size standard printed in the solicitation itself.
Who buys it
Departments that posted the most NAICS 221320 solicitations in the last two years:
Grade 2 wastewater operator · Agriculture · California · posted September 22, 2026
Waste Water Treatment Services Newton Square PA · Department of Defense · posted September 18, 2026
Umpqua NF Operations and Maintenance Water/Wastewater Systems IDIQ · Agriculture · Oregon · posted September 4, 2026
FBSU Water/Sewage Utility and Solid Waste Disposal Services · Health and Human Services · Montana · posted September 4, 2026
48 CES - Diesel Sewage Pump · Department of Defense · posted August 20, 2026
S--Wastewater Treatment Services for Yosemite NP · Interior · posted August 17, 2026
Solicitation Multiyear Preventive Maintenance Service Contract of the Wastewater Treatment Services US Embassy Jakarta · State, Department of · Idaho · posted August 7, 2026
Wastewater Treatment Services for Yosemite NP · Interior · posted August 7, 2026
Do this kind of work?
Send XL Eagle your price on an open sewage treatment facilities job. We write and submit the bid under our registrations. If we win, you do the work at your price. No fees.
NAICS 221320 is Sewage Treatment Facilities. This industry comprises establishments primarily engaged in operating sewer systems or sewage treatment facilities that collect, treat, and dispose of waste.
What is the SBA size standard for NAICS 221320?
The size standard for NAICS 221320 is $35 million in average annual receipts. Firms at or under it count as small businesses for contracts assigned this code.
Are there government contracts for sewage treatment facilities?
Yes. 2 government contracts are open under NAICS 221320 right now, and 14 were posted in the last 12 months.
Can I bid on NAICS 221320 contracts without registering in SAM.gov?
You need an active SAM.gov registration to win a federal contract in your own name. If you would rather skip that, XL Eagle can bid as the prime contractor using your price, and you do the work as our subcontractor.
XL Eagle