NAICS 221320: Sewage Treatment Facilities
Sewage Treatment Facilities is NAICS code 221320. A business is small under it with $35 million or less in average annual receipts. 7 federal contracts are open on SAM.gov under this code right now.
- SBA size standard
- $35 million or less in average annual receipts
- Open contracts now
- 7
- Federal spending, FY2025
- $237.4 million
- Share won by small businesses
- 11%
- Small businesses registered
- 815
Open federal contracts for sewage treatment facilities
- Maintenance, Repair, And Operation Of Incinerator Plant, Weight Scales, Potable Water Tanks, Wastewater Treatment Plants To Include Operation, And Granular Activated Carbon (GAC) Filtering Systems at CFA Yokosuka
Due in 9 daysOct 14, 2026
- GRCA 257282 - Replace South Rim Wastewater Treatment Plant, Grand Canyon, AZ
Due in 29 daysNov 2, 2026
- GRCA 257282 - Replace Wastewater Plant at South Ri
Due in 29 daysNov 2, 2026
- GRCA 257282 - Replace Wastewater Plant at South Rim Village
Due in 29 daysNov 2, 2026
- GRCA 257282 - Replace Wastewater Plant at South Ri
Due in 29 daysNov 2, 2026
- Operations and Maintenance (O&M) Services for the SBIWTP
Due in 94 daysJan 6, 2027
What NAICS 221320 covers
The Census Bureau's NAICS index lists these kinds of work under 221320:
- Collection, treatment, and disposal of waste through a sewer system
- Sewage disposal plants
- Sewage treatment plants or facilities
- Sewer systems
- Waste collection, treatment, and disposal through a sewer system
Read the full definition, including what's excluded, on census.gov.
SBA size standard for 221320
To count as a small business for a contract assigned NAICS 221320, your business must have $35 million or less in average annual receipts. Receipts are averaged over your last five completed fiscal years.
From SBA's table of size standards, effective Mar 17, 2023. Confirm it with SBA's size standards tool before you certify your size.
Who buys sewage treatment facilities
Agencies that awarded the most under NAICS 221320 over the last three fiscal years, per USAspending.gov:
| Agency | Obligated |
|---|---|
| Defense Logistics Agency | $262.9 million |
| International Boundary and Water Commission: U.S.-Mexico | $106 million |
| Department of the Army | $82.5 million |
| Department of the Navy | $64.3 million |
| Department of the Air Force | $52 million |
| Federal Prison System / Bureau of Prisons | $45.9 million |
| National Park Service | $14.8 million |
| Forest Service | $5.6 million |
Open notices right now come from Department of the Interior (4), Department of Agriculture (1), Dept of Defense (1) and International Boundary and Water Commission: US-Mexico (1).
Set-asides on open 221320 contracts
- No set-aside (full and open): 6
- Total small business set-aside: 1
Not sure which set-asides you qualify for? Try the free SBA certification screener, or read set-aside contracts, explained.
Your competition
815 businesses with active SAM.gov registrations are rated small under NAICS 221320, most of them in Texas (81), California (79), Florida (66), Virginia (39) and Arizona (30). Look any of them up with the free CAGE code and UEI lookup.
Federal spending under 221320 by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $222.4 million |
| FY2025 | $237.4 million |
| FY2026 | $191.2 million |
| FY2027 (so far) | $0 |
Source: USAspending.gov, all contract awards with this NAICS code. Fiscal years start October 1.
Related NAICS codes
Frequently asked questions
What is NAICS code 221320?
221320 is the 2022 NAICS code for Sewage Treatment Facilities. The Census Bureau's index lists work such as collection, treatment, and disposal of waste through a sewer system, sewage disposal plants, sewage treatment plants or facilities under it. Federal contracting uses the 2022 codes.
What is the SBA size standard for NAICS 221320?
$35 million or less in average annual receipts. A business at or under that is small for contracts assigned this code. The current SBA table took effect Mar 17, 2023.
Are there government contracts for sewage treatment facilities?
Yes. 7 federal contract opportunities under NAICS 221320 are open on SAM.gov right now. Agencies obligated about $237.4 million under this code in fiscal year 2025, according to USAspending.gov.
How do I add NAICS code 221320 to my SAM.gov registration?
Update your entity registration on SAM.gov and add the code on the Goods and Services page, in the Assertions section. You can list several NAICS codes and mark one as your primary. Changes are free.
Keep going
- Search other NAICS codes by keyword or company
- How to choose NAICS codes for government contracts
- NAICS codes with the most open federal contracts
FedReady is an independent company, not affiliated with SBA, SAM.gov, the Census Bureau or any government agency. Open-contract counts come from SAM.gov and update daily; spending figures come from USAspending.gov.