NSF Product and Service Listings

These NSF Official Listings are current as of Thursday, November 13, 2025 at 12:15 a.m. Eastern Time. Please contact NSF to confirm the status of any Listing, report errors, or make suggestions.

Alert: NSF is concerned about fraudulent downloading and manipulation of website text. Always confirm this information by clicking on the below link for the most accurate information: http://info.nsf.org/Certified/Wastewater/Listings.asp?Standard=040&Company=3B980&

NSF/ANSI 40
Residential Wastewater Treatment Systems

 
SludgeHammer Group Ltd. 
4772 US 131 South
Building D 
Petoskey, MI 49770 
United States 
231-348-5866

Facility : Petoskey, MI

Model Number Rated Capacity
Gallons/Day		 Classification
S-1000 1000 Class I
S-400 400 Class I
S-600 600 Class I
S-800 800 Class I

Number of matching Manufacturers is 1
Number of matching Products is 4
Processing time was 0 seconds