In Clayton County, Iowa, which covers part of Postville, we have measured 5,028 parcels on septic and 3,986 on sewer. That is a county measurement. We do not hold a septic count for Postville on its own and this page does not estimate one. Postville also extends into Allamakee County, which are reported separately below and are not included in that figure.
Postville is a city in Clayton and Allamakee Counties, Iowa. The Census Bureau puts its internal point at 43.084388, -91.567795 and its land area at 2.14 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 |
|---|---|---|---|---|---|
| Clayton County | 292 | 5,028 | 3,986 | county portal | no account needed |
| Allamakee County | 262 | 4,329 | 3,307 | county portal | no account needed |
Our collection for Clayton County, Iowa is small, at 292 septic records. Treat it as a starting point for a Postville property rather than a search that settles the question. The county is genuinely mixed: 5,028 of 9,014 classified parcels are on septic and the rest are sewered. Which side of that line a Postville address falls on is worth establishing before anything else. The county publishes a records portal that we were able to search without creating an account, which makes checking a specific parcel something you can do yourself in a few minutes.
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 Postville | keeping the system you have working |
| Buyer or seller | Buying or selling in Postville | what to pull and check before closing |
| Realtor | Buying or selling in Postville | the same records a seller needs on file |
| Designer or engineer | Septic design in Postville | design flow, tank capacity, dispersal sizing |
| Installer or contractor | Septic installation in Postville | site evaluation, permit sequence, inspection |
| Septic pumper | Septic pumping in Postville | tank access, lids and service interval |
| Inspector | Septic inspection in Postville | what gets checked and what a failure means |
| Land investor | Septic installation in Postville | 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 Clayton County, Iowa, which covers part of Postville, we have measured 5,028 parcels on septic and 3,986 on sewer. That is a county measurement. We do not hold a septic count for Postville on its own and this page does not estimate one. Postville also extends into Allamakee County, which are reported separately below and are not included in that figure.
Postville is in Clayton and Allamakee Counties, Iowa.
From the Census ZCTA-to-place relationship file, with the share of Postville’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 Postville.
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 Clayton and Allamakee Counties, Iowa.