Madison County, Illinois
Edwardsville Township is a township in Madison County, Illinois. Septic permits inside Edwardsville Township come from Madison County (Madison County Planning & Development — Private Sewage Permits & Inspections · (618)296-4663). 9 rules below are quoted from official sources and independently re-checked, most recently on October 29, 2026. Rules for unincorporated land are on the Madison County page.
Edwardsville Township does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
Accessory structures over 200 square feet on unincorporated land within Edwardsville Township that is subject to Madison County jurisdiction.
accessory structure area: > 200 square feet
“All accessory structures over 200 S.F. in size must obtain a building permit.”
Development projects in floodplains under Madison County jurisdiction on unincorporated land within Edwardsville Township.
“Inspect all development projects and take any and all penalty actions outlined in Section 13 as a necessary to ensure compliance with this ordinance.”
Private sewage systems on unincorporated land within Edwardsville Township that is subject to Madison County jurisdiction.
“Madison County has continuously been designated by the Illinois Department of Public Health as an authorized agent of the State of Illinois”
Construction, alteration, or extension of an individual sewage disposal system on unincorporated land within Edwardsville Township subject to Madison County jurisdiction.
“It shall be unlawful for any person to construct, alter or extend the individual sewage disposal systems within the County unless a valid permit has been issued”
A private sewage system installed by a homeowner for the homeowner's personal residence on unincorporated land within Edwardsville Township subject to Madison County jurisdiction.
“shall not be covered or placed in operation until the installation shall be inspected and written approval of the system shall have been issued by the Department.”
Private sewage disposal systems on unincorporated land within Edwardsville Township subject to Madison County jurisdiction.
“Septic tanks discharging to farm tiles, storm sewers, village tiles, roadside ditches, drainage ditches, railroad ditches, ground surface, rivers, lakes, streams or intermittent waterways.”
New private water-well construction inside Edwardsville Township.
“the IDPH and local health departments review water well installation plans, issue permits for new well construction, and inspect wells.”
Subdivisions on unincorporated land within Edwardsville Township subject to Madison County jurisdiction.
“The Land Use Committee requires that a approved private sewage subdivision plat be on file for all subdivisions approved under the authority of the Madison County Subdivision Control Ordinance.”
Private-sewage permit applications on unincorporated land within Edwardsville Township subject to Madison County jurisdiction.
“All applications for permits shall be made on forms provided by the Building, Zoning and Environmental Department. Sufficient data shall be included to allow review”
We looked and could not find an official answer yet. Silence is not permission; ask Edwardsville Township or Madison 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 Edwardsville Township publishes no rule on the point, not that none exists. Madison County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Edwardsville Township means bringing your own water and power. The kit we’d start with:
These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.