In Johnson County, Iowa, which covers Coralville, we have measured 18,077 parcels on septic and 22,891 on sewer. That is a county measurement. We do not hold a septic count for Coralville on its own and this page does not estimate one.
Coralville is a city in Johnson County, Iowa. The Census Bureau puts its internal point at 41.698795, -91.5968 and its land area at 12.67 square miles. Septic permitting and record keeping happen at the county level, not the city level, which is why every figure below is attributed to the county and linked back to the county page it came from.
| County | Records we hold | Parcels on septic | Parcels on sewer | County records portal | Searchable without an account |
|---|---|---|---|---|---|
| Johnson County | 682 | 18,077 | 22,891 | not published | — |
Our collection for Johnson County, Iowa is small, at 682 septic records. Treat it as a starting point for a Coralville property rather than a search that settles the question. The county is genuinely mixed: 18,077 of 40,968 classified parcels are on septic and the rest are sewered. Which side of that line a Coralville address falls on is worth establishing before anything else. We have not found a published online records portal for this county, which means the file is requested from the county directly rather than searched.
Septic is one subject with very different jobs inside it. These go straight to the page that does yours.
| If you are a | Go to | Because it covers |
|---|---|---|
| Homeowner | Septic pumping in Coralville | keeping the system you have working |
| Buyer or seller | Buying or selling in Coralville | what to pull and check before closing |
| Realtor | Buying or selling in Coralville | the same records a seller needs on file |
| Designer or engineer | Septic design in Coralville | design flow, tank capacity, dispersal sizing |
| Installer or contractor | Septic installation in Coralville | site evaluation, permit sequence, inspection |
| Septic pumper | Septic pumping in Coralville | tank access, lids and service interval |
| Inspector | Septic inspection in Coralville | what gets checked and what a failure means |
| Land investor | Septic installation in Coralville | whether raw land can take a system at all |
No. We measure septic and sewer at parcel level and roll it up by county. In Johnson County, Iowa, which covers Coralville, we have measured 18,077 parcels on septic and 22,891 on sewer. That is a county measurement. We do not hold a septic count for Coralville on its own and this page does not estimate one.
Coralville is in Johnson County, Iowa.
From the Census ZCTA-to-place relationship file, with the share of Coralville’s land area that falls in each. A ZIP is not a place boundary and the two only ever partly agree, which is exactly why both pages exist.
Straight-line distance from the Census internal point of Coralville.
Parcel Perfect generates a code-shaped septic design and as-built style drawing for a parcel from the records and site data we hold, and shows every parcel we have classified as septic or sewer on one map. Both are open to use for any parcel in Johnson County, Iowa.