Louisa County, Iowa
Cotter is a city in Louisa County, Iowa. Septic permits inside Cotter come from the county and state together. 4 rules below are quoted from official sources and independently re-checked, most recently on November 1, 2026. Rules for unincorporated land are on the Louisa County page.
Cotter does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
Private sewage disposal systems (septic) for homes inside Cotter city, where no publicly owned treatment works is available; the administering authority is the Iowa DNR or the local county board of health
““administrative authority” means the department or the local county board of health as authorized by iowa code section 455b.172 and chapter 137.”
New or altered private sewage disposal systems for buildings inside Cotter city (Louisa County, IA) where no publicly owned treatment works is available
“no psds shall be installed or altered as described in 69.1(3) “b” unless a construction permit issued by the administrative authority is obtained prior to construction.”
Newly constructed private sewage disposal systems inside Cotter city, where no publicly owned treatment works is available
“c. final inspections. the administrative authority shall conduct an at-location inspection of all newly constructed psdss before the system is backfilled.”
Homes inside Cotter city where no publicly owned treatment works is available
“(3) when a potw is not available, every building wherein persons generate domestic sewage shall be provided with an approved psds. a holding tank for waste may be used only if all other psds options are impractical.”
We looked and could not find an official answer yet. Silence is not permission; ask Cotter or Louisa County directly.
Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.
Unanswered questions are usually a sign that Cotter publishes no rule on the point, not that none exists. Louisa County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Cotter means bringing your own water and power. The kit we’d start with:
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