Mills County, Iowa
Henderson is a city in Mills County, Iowa. Septic permits inside Henderson come from Mills County (Mills County Environmental Health Office · 712-527-9699 Option 4). 3 rules below are quoted from official sources and independently re-checked, most recently on November 2, 2026. Rules for unincorporated land are on the Mills County page.
Henderson 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 land inside Henderson city, Iowa (Mills County). The statewide rule makes the local county board of health the administrative authority, or the Iowa DNR where it acts. Henderson city is in the county board's area; a Henderson-specific service-area statement was not confirmed on an official page.
““administrative authority” means the department or the local county board of health as authorized by iowa code section 455b.172 and chapter 137.”
Installing or altering a private sewage disposal system (septic) on land inside Henderson city, Iowa, under the statewide chapter 567-69. The construction permit is issued by the administrative authority (county board of health or Iowa DNR).
“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 on land inside Henderson city, Iowa, under the statewide chapter 567-69.
“the administrative authority shall conduct an at-location inspection of all newly constructed psdss before the system is backfilled. a final as-built drawing shall be made as part of the final inspection and kept on file with the construction permit.”
We looked and could not find an official answer yet. Silence is not permission; ask Henderson or Mills 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 Henderson publishes no rule on the point, not that none exists. Mills County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Henderson means bringing your own water and power. The kit we’d start with:
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