Dallas County, Iowa
Dawson is a city in Dallas County, Iowa. Septic permits inside Dawson come from the county and state together. 3 rules below are quoted from official sources and independently re-checked, most recently on November 1, 2026. Rules for unincorporated land are on the Dallas County page.
Dawson 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) on land inside Dawson city, which lies in Dallas County, Iowa
““administrative authority” means the department or the local county board of health as authorized by iowa code section 455b.172 and chapter 137.”
Private sewage disposal systems installed or altered on land inside Dawson city, Dallas County, Iowa
“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.”
Existing buildings served by a private sewage disposal system inside Dawson city, when a publicly owned treatment works (sewer) becomes available nearby
potw availability distance: 200 feet
“(2) when a potw becomes available within 200 feet, any building then served by a psds shall be connected to said potw within a time frame and under conditions set by the administrative authority.”
We looked and could not find an official answer yet. Silence is not permission; ask Dawson or Dallas 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 Dawson publishes no rule on the point, not that none exists. Dallas County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Dawson means bringing your own water and power. The kit we’d start with:
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