Peoria County, Illinois
Chillicothe Township is a township in Peoria County, Illinois. Septic permits inside Chillicothe Township come from Peoria County (Peoria City/County Health Department, Environmental Health Division · 309-679-6161). 10 rules below are quoted from official sources and independently re-checked, most recently on October 29, 2026. Rules for unincorporated land are on the Peoria County page.
Chillicothe Township does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
New construction, additions, alterations, renovations and repairs of buildings or structures on land in Chillicothe township outside the City of Chillicothe (Peoria County Planning & Zoning permits)
“a building permit is required for new construction, additions, alterations, renovations, and repairs of a building or structure.”
Onsite (septic) wastewater systems on land inside Chillicothe township that is not served by a sanitary sewer (the county chapter applies within Peoria County boundaries, which includes this township)
“it shall be unlawful for any person to construct or repair an onsite wastewater treatment system within peoria county, unless said person holds a valid permit issued by the health authority or its authorized representative.”
Construction, repair or alteration of an onsite septic system on land inside Chillicothe township not served by a sanitary sewer
septic permit validity: 12 months (void if construction is not started within that period)
“the construction or repair of an onsite wastewater treatment system shall not commence until a permit is first obtained from the health department.”
Installation of an onsite septic system on land inside Chillicothe township not served by a sanitary sewer
“an inspection shall be made by the health authority or authorized representative to determine if full compliance of the chapter has been met before any back filling of the onsite wastewater treatment system is started.”
Off-grid household wastewater disposal on land inside Chillicothe township
“no person shall discharge or cause to be discharged untreated wastewater or the effluent from any onsite wastewater treatment system, directly or indirectly, to any stream, ditch, lake, pond, bathing area, ground surface or abandoned well”
Subdivision of land in Chillicothe township, including unsewered lots, under Peoria County rules (the county chapter applies countywide; City of Chillicothe subdivision rules were not reviewed)
“all lots not served by sanitary sewer must have an area available which will provide sufficient space to install, maintain and repair an onsite wastewater treatment system.”
Onsite septic systems in designated flood hazard areas on land inside Chillicothe township; general floodplain building permits are not covered by this claim
“all new and replacement onsite wastewater treatment systems shall be designed, located, and constructed, to minimize impairment and infiltration of flood waters.”
Onsite septic (private sewage disposal) permit fees only, for systems on land inside Chillicothe township; building permit fees were not located
septic permit application fee: 200 USD (non-refundable; separate variance and subdivision fees apply)
“onsite wastewater treatment program permit application fee: $200.00”
Septic system permit process for land inside Chillicothe township not served by sanitary sewer
septic permit action time: <= 10 business days (from receipt of a complete application; plus up to 15 business days if a variance is requested)
“the health authority shall take action and reply to the applicant on all complete applications within ten (10) business days of receipt of application.”
“residential permits usually take between 2-3 business days to complete the review process, while commercial permits take an average of 14 business days to complete.”
We looked and could not find an official answer yet. Silence is not permission; ask Chillicothe Township or Peoria 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 Chillicothe Township publishes no rule on the point, not that none exists. Peoria County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Chillicothe Township means bringing your own water and power. The kit we’d start with:
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