In Walworth County, Wisconsin, which covers Delavan, we have measured 12,602 parcels on septic and 31,570 on sewer. That is a county measurement. We do not hold a septic count for Delavan on its own and this page does not estimate one.
Delavan is a city in Walworth County, Wisconsin. The Census Bureau puts its internal point at 42.630455, -88.629781 and its land area at 7.41 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 |
|---|---|---|---|---|---|
| Walworth County | 1 | 12,602 | 31,570 | county portal | account or login required |
Our collection for Walworth County, Wisconsin is small, at 1 septic records. Treat it as a starting point for a Delavan property rather than a search that settles the question. The county is genuinely mixed: 12,602 of 44,172 classified parcels are on septic and the rest are sewered. Which side of that line a Delavan address falls on is worth establishing before anything else. The county publishes a records portal, but reaching the documents needs an account or a login, so budget for that step rather than expecting an open search.
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 Delavan | keeping the system you have working |
| Buyer or seller | Buying or selling in Delavan | what to pull and check before closing |
| Realtor | Buying or selling in Delavan | the same records a seller needs on file |
| Designer or engineer | Septic design in Delavan | design flow, tank capacity, dispersal sizing |
| Installer or contractor | Septic installation in Delavan | site evaluation, permit sequence, inspection |
| Septic pumper | Septic pumping in Delavan | tank access, lids and service interval |
| Inspector | Septic inspection in Delavan | what gets checked and what a failure means |
| Land investor | Septic installation in Delavan | whether raw land can take a system at all |
These are real businesses we hold an address for, not a ranked or paid list. We take no fee and list nobody preferentially. Confirm current licensing with your county or state before hiring.
With an address in Delavan itself
| Business | Town on file | Phone | Rating |
|---|---|---|---|
| Senft Septic Pumping Service | Delavan | (262) 490-4229 | 5.0 (1) |
No. We measure septic and sewer at parcel level and roll it up by county. In Walworth County, Wisconsin, which covers Delavan, we have measured 12,602 parcels on septic and 31,570 on sewer. That is a county measurement. We do not hold a septic count for Delavan on its own and this page does not estimate one.
Delavan is in Walworth County, Wisconsin.
From the Census ZCTA-to-place relationship file, with the share of Delavan’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 Delavan.
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 Walworth County, Wisconsin.