Are Composting Toilets Legal in South Dakota? (2026)
Partially — Composting Toilets are legal with restrictions in South Dakota as of 2026.
Quick Answer
Composting toilets may be used in South Dakota but typically only as a supplemental system alongside a conventional toilet. No significant legislative changes have been made to the state's individual and small on-site wastewater systems rules.
What the Law Says
Regulates the use of composting toilets as supplemental systems requiring county health department approval, especially where conventional water or electrical systems are unavailable; prohibits installation without proper permits and allows some counties to ban them entirely.
— S.D. Admin. R. 74:53:01:01
| Category | Details |
|---|---|
| State Plumbing Code | May require conventional toilet as primary; composting as supplemental |
| Permit Requirements | Legal to sell |
| Code Violation Penalties | Installation without permits may result in code violations. |
| Pending Legislation | None known |
No significant legislative changes have been made to the state's individual and small on-site wastewater systems rules.
Enforcement Reality
Enforcement is handled by the South Dakota Department of Agriculture and Natural Resources (DANR). Composting toilets are only permitted when water or electrical systems are not available, and some counties, like Custer County, have banned them entirely.
A common mistake is attempting to install a composting toilet where conventional systems are available. Another is not checking for local county ordinances, which can be more restrictive than state law.
Local Exceptions
None identified. State law applies uniformly across South Dakota. Local ordinances may still vary — check with your city or county government for any additional rules.
Bottom Line
Composting Toilets are legal with restrictions in South Dakota. This activity is permitted, but specific conditions apply. Violating those conditions can result in fines or criminal charges. Read the rules carefully and consult an attorney if unsure.
South Dakota vs. the Rest of the US
Across the US, installing a composting toilet is fully legal in 20 states, restricted in 30, and illegal in 0. South Dakota falls in the RESTRICTED category.
View the full 50-state map →Reviewed by cross-referencing the cited state statute against current legislative databases and regulatory publications.
Sources & Verification
This page was reviewed by Ethan Harper by comparing the legal status against the cited state statute. AllowedHere is an informational resource and does not provide legal advice. Consult a licensed attorney for guidance specific to your situation.
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