221320

Sewage Treatment Facilities

Utilities › Utilities › Water, Sewage and Other Systems

SBA Size Standard

$35M average annual receipts

Revenue-Based Verify at SBA.gov →

NAICS Code Hierarchy

22

Sector

Utilities

221

Subsector

Utilities

2213

Industry Group

Water, Sewage and Other Systems

221320

National Industry (This Code)

Sewage Treatment Facilities

Official NAICS Description

Source: U.S. Census Bureau 2022 NAICS

📘 Source: U.S. Census Bureau — 2022 NAICS Manual
This industry comprises establishments primarily engaged in operating sewer systems or sewage treatment facilities that collect, treat, and dispose of waste.

✓ Small Business Eligibility at a Glance

Based on SBA Table of Small Business Size Standards (2024)

Size Standard

$35M average annual receipts

Measurement Period

3-year average

Standard Type

Revenue-Based

Applies To

All contracts under NAICS 221320

Set-Aside Programs

8(a), WOSB, HUBZone, SDVOSB

Certification Required

No (self-certify in SAM.gov)

Size standards are set by the SBA and reviewed periodically. Always verify at SBA.gov before bidding.

Cross-References

The following activities are classified elsewhere in the NAICS system:

Operating waste treatment or disposal facilities (except sewer systems or sewage treatment facilities)--are classified in Industry 56221, Waste Treatment and Disposal;
Operating water treatment plants and/or operating water supply systems--are classified in Industry 221310, Water Supply and Irrigation Systems;
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; and
Cleaning and rodding sewers and catch basins--are classified in U.S. Industry 562998, All Other Miscellaneous Waste Management Services.

How to Use NAICS 221320 in SAM.gov

NAICS code 221320Sewage Treatment Facilities — is used in SAM.gov to identify businesses whose primary activity falls within this classification. When you add this code to your SAM.gov entity registration, contracting officers searching for vendors in the Water, Sewage and Other Systems space will be able to find your business.

If this code represents your primary business activity, designate it as your primary NAICS code. Your primary NAICS code determines your size standard for any contract solicited under this code. With a size standard of $35M average annual receipts, your business must be at or below this threshold to qualify as a small business for set-aside contracts under NAICS 221320.

Log in Entity Registration Goods & Services Add NAICS Code Enter 221320 Save

Frequently Asked Questions

What is NAICS code 221320?

NAICS code 221320 is 'Sewage Treatment Facilities', classified under the Utilities sector (NAICS 22). This industry comprises establishments primarily engaged in operating sewer systems or sewage treatment facilities that collect, treat, and dispose of waste. Cross-References. Establishments primaril

What is the SBA small business size standard for NAICS code 221320?

The SBA defines a small business under NAICS code 221320 (Sewage Treatment Facilities) as one with $35M average annual receipts. This size standard determines eligibility for small business set-aside contracts, 8(a), HUBZone, WOSB, and SDVOSB programs in SAM.gov.

How do I register NAICS code 221320 in SAM.gov?

To register NAICS code 221320 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 221320 (Sewage Treatment Facilities) to your NAICS code list. You may designate one code as your Primary NAICS code.

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