Montgomery County, Missouri
High Hill is a city in Montgomery County, Missouri. Septic permits inside High Hill come from the state health agency. 3 rules below are quoted from official sources and independently re-checked, most recently on November 5, 2026. Rules for unincorporated land are on the Montgomery County page.
High Hill does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
Onsite sewage systems inside High Hill city limits where neither High Hill nor Montgomery County has adopted the state standard.
“City or county governments may adopt, by order or ordinance, the state standard in accordance with the provisions of sections 701.025 to 701.059. In any jurisdiction where a city or county has not adopted the state standard, the department of health and senior services shall enforce the state standard until such time as the city or county adopts the standard;”
Installation or repair of onsite sewage systems inside High Hill city limits.
residential property threshold: < 3 acres (The exemption does not apply in some counties; check with the county authority.)
“A construction permit is required to install or repair a system on any residential property less than three (3) acres. (This exemption does not apply in some counties; check with the county authority.) Regardless of the size of the property, a permit is necessary for systems that serve businesses.”
Domestic sewage disposal for buildings inside High Hill city limits.
“Property owners of all buildings where people live, work or assemble shall provide for the sanitary disposal of all domestic sewage. Except as provided in this section, sewage and waste from such buildings shall be disposed of by discharging into a sewer system regulated pursuant to chapter 644, or shall be disposed of by discharging into an on-site sewage disposal system operated as defined by rules promulgated pursuant to sections 701.025 to 701.059.”
We looked and could not find an official answer yet. Silence is not permission; ask High Hill or Montgomery 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 High Hill publishes no rule on the point, not that none exists. Montgomery County’s page lists the county offices to call.
Off-grid gear
Going off-grid in High Hill means bringing your own water and power. The kit we’d start with:
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