Johnson County, Kansas: septic system inspection at sale
Checked on November 9, 2026 against the official rule. Rule set by Johnson County (JCDHE).
General information, not legal advice. This is our summary of the official rule as we read it. The ordinance or code and the health department decide: confirm with them before you list, sign or close.
The rule
All of Johnson County except De Soto, Gardner and Edgerton. The inspection comes after the purchase: within 30 days, with a System Use Permit for the new owner.
| Question | What the official text says |
|---|---|
| What is required | Private sewage system resale inspection by licensed installer; tank pumped by licensed contractor; new owner applies for System Use Permit within 30 days Source: jocogov.org |
| Triggered by | sale (purchase of property) in covered area (all of county except DeSoto, Gardner, Edgerton) Source: jocogov.org |
| Deadline | within 30 days after purchase (pre-sale inspection advisable) Source: jocogov.org |
| Who arranges it | buyer or seller Source: jocogov.org |
| Who pays | buyer or seller Source: jocogov.org |
| Exemptions |
Source: jocogov.org |
| If the system fails | Repairs require JCDHE permit and a JCDHE-licensed installer Source: jocogov.org |
| Who may inspect | JCDHE-licensed installer (2026 list). official list (jocogov.org) Source: jocogov.org |
| Official forms | jocogov.org Source: jocogov.org |
This is our summary of the official rule as we read it. The ordinance or code and the health department decide: confirm with them before you list, sign or close. Rule set by: Johnson County (JCDHE).
Checked on November 9, 2026: read on the official site.
Private wells in Johnson County
In 2015 about 320 of Johnson County’s 580,159 residents (under 1%) got their drinking water from a private well, by the USGS estimate. That is the 85th highest share of the 105 Kansas counties in the USGS table, and the 80th highest number of private-well users.
As we read it, this rule covers the septic system, not the well.
Source: USGS county water use 2015 (Dieter et al., 2018). Ranks count the Kansas counties in the USGS table (1 = highest).
Soils and septic systems here
USDA soil surveys rate 100% of Johnson County’s rated land “very limited” for a conventional septic drain field, 0% “somewhat limited” and 0% “not limited”, the 22nd highest “very limited” share of 105 Kansas counties with survey data. The most common limits: slow percolation (dense or clay soil) on 90%; a high water table (saturated soil near the surface) on 69%; shallow bedrock on 29%.
Where soils are limited, inspections more often find drain fields that sit in seasonally wet soil, and replacement systems are often mounds or other engineered designs. A county-wide rating, not a test of one lot: a site evaluation decides. Source: USDA NRCS Soil Survey Geographic Database (SSURGO), via Soil Data Access, rating “ENG - Septic Tank Absorption Fields”, read November 15, 2026.
Nearest other sale-time rules
Buying or selling near a county line? These are the closest other local rules in our census to Johnson County.
| Rule | State | Distance | Covers | Checked |
|---|---|---|---|---|
| Leavenworth County | Kansas | about 22 miles | Septic system | November 13, 2026 |
| Cowley County | Kansas | about 162 miles | Septic system | November 13, 2026 |
| Lancaster County | Nebraska | about 164 miles | Septic system and well | November 13, 2026 |
| Jackson County | Minnesota | about 328 miles | Septic system | November 9, 2026 |
| Faribault County | Minnesota | about 329 miles | Septic system | November 9, 2026 |
Straight-line distance between county centres (the average of each county’s Census ZIP-area points). Townships, villages and health districts are placed at the centre of their county.