NSF Standard 41

The International Compost Sanitation Forum and Message Board: Humanure Composting Around the World: NSF Standard 41
Author: Anonymous
Thursday, May 05, 2005 - 4:00 pm
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This is my state's regulation concerning Composting Toilets--does anybody know what the NSF Standard 41 refers to? Might the sytems described on this web site (i.e. the saw-dust toilet, composting bin constructed from pallets, and appropriate cover materials) satisfy this regulation?

6.13. Composting Toilets.

6.13.a. Utilization of composting toilets may be only in conjunction with an approved grey water treatment and disposal system.

6.13.b. The design and construction of a composting toilet shall meet the requirements of NSF Standard 41.

Author: Ronald Mazerolle
Thursday, May 05, 2005 - 6:59 pm
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NSF/ANSI Standard 41
Standard 41, relating to composting toilets, requires a minimum six months of performance testing, incorporating design loading and stress testing appropriate to the three classes of systems covered: residential, cottage, and day-use park. A minimum of one system is evaluated in a controlled, laboratory setting, and a minimum of three systems are evaluated in a mature, field setting.

This was taken from the National Sanation Foundation site. Many of the Sun-Mar composting toilets have this certification.

Author: Anonymous
Monday, May 09, 2005 - 3:03 pm
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Thanks for responding. It looks as if to read the actual requirements, you need access to the standards themselves. They can be purchased online, but are rather expensive. Perhaps they are available at libraries... In any event, I feel sure the system described in the Humanure Handbook requires to much individual awareness and attention to meet those requirements. More helpful, perhaps, than the NSF standards is the chapter on Legalities in the Humanure Handbook. Thanks again for your post!

Author: TCLynx
Sunday, January 01, 2006 - 8:49 pm
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The Humanure system is not a composting toilet. The composting does not take place in the toilet, it takes place in the back yard compost pile and therefore is not subject to those same regulations.
However, these same regulations generally require some sort of waste water treatment. Either sewer hookup, septic systems, or in some cases composting toilet and grewater system. Only in very rare occasions would a humanure system be acceptable as a replacement for the more traditional toilet systems. Most people go ahead and put in a traditional system even if they don't use it. Generally fighting the regulations is going to be more costly than putting in a traditional system.

Of course if you wish to do it on principal, more power to you. Good luck.

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