Rock Island County, Illinois
South Moline Township is a township in Rock Island County, Illinois. Septic permits inside South Moline Township come from South Moline Township. 3 rules below are quoted from official sources and independently re-checked, most recently on October 30, 2026. Rules for unincorporated land are on the Rock Island County page.
South Moline Township does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
Building sites in unincorporated Rock Island County; applies inside South Moline township only where the land is unincorporated (not verified). This is the county FAQ's general answer, not a district schedule.
minimum lot area for smallest parcels: >= 20000 square feet (smallest parcels; county may require 40 acres in extreme outlying areas) · minimum building site in extreme outlying areas: >= 40 acres (county may require; applies in extreme outlying areas only)
“this varies depending on where the property is located. the smallest parcels may be 20,000 square feet (just shy of 1/2 acre). if you are looking at a property that is in the extreme outlying areas, rock island county may require a minimum of 40 acres for a building site.”
Septic systems for a new home on land in unincorporated Rock Island County, which the county Building Safety page treats as needing health-department approval; applies inside South Moline township only where the land is unincorporated (not verified)
“approval from environmental health, a division of the rock island county health department for a septic system.”
Building permit application for a new home in unincorporated Rock Island County; applies inside South Moline township only where the land is unincorporated (not verified)
“here are a few things you should have: approval from environmental health, a division of the rock island county health department for a septic system. a site layout, which is a simple drawing of where the structure will be located on the property, showing rough distances from property lines. two sets of blueprints. engineered truss drawings, with a stamp from an illinois-licensed engineer.”
We looked and could not find an official answer yet. Silence is not permission; ask South Moline Township or Rock Island 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 South Moline Township publishes no rule on the point, not that none exists. Rock Island County’s page lists the county offices to call.
Off-grid gear
Going off-grid in South Moline Township means bringing your own water and power. The kit we’d start with:
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