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NAICS 221320 is the North American Industry Classification System code for Sewage Treatment Facilities, a national industry in the Water, Sewage and Other Systems industry group (2213) of the Utilities sector (22).
Frequently asked questions
What is NAICS code 221320?
NAICS 221320 is the code for Sewage Treatment Facilities, a national industry in the North American Industry Classification System (NAICS 2022), under 2213 (Water, Sewage and Other Systems). It is a 6-digit code, the most specific NAICS level.
What is the parent code of NAICS 221320?
The parent of NAICS 221320 is 2213, Water, Sewage and Other Systems. Every company under 221320 is also counted under 2213.