In Okanogan County, Washington, which covers part of Coulee Dam, we have measured 14,350 parcels on septic and 6,203 on sewer. That is a county measurement. We do not hold a septic count for Coulee Dam on its own and this page does not estimate one. Coulee Dam also extends into Grant County and Douglas County, which are reported separately below and are not included in that figure.
Coulee Dam is a town in Okanogan, Grant and Douglas Counties, Washington. The Census Bureau puts its internal point at 47.968511, -118.97628 and its land area at 0.72 square miles. Septic permitting and record keeping happen at the county level, not the town 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 |
|---|---|---|---|---|---|
| Okanogan County | 5 | 14,350 | 6,203 | county portal | no account needed |
| Grant County | 15,176 | none held | none held | county portal | account or login required |
| Douglas County | 63 | none held | none held | county portal | account or login required |
Our collection for Okanogan County, Washington is small, at 5 septic records. Treat it as a starting point for a Coulee Dam property rather than a search that settles the question. Of the parcels we have classified in the county, most are on septic rather than sewer (14,350 of 20,553). A property near Coulee Dam is more likely than not to have its own system. 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 Coulee Dam | keeping the system you have working |
| Buyer or seller | Buying or selling in Coulee Dam | what to pull and check before closing |
| Realtor | Buying or selling in Coulee Dam | the same records a seller needs on file |
| Designer or engineer | Septic design in Coulee Dam | design flow, tank capacity, dispersal sizing |
| Installer or contractor | Septic installation in Coulee Dam | site evaluation, permit sequence, inspection |
| Septic pumper | Septic pumping in Coulee Dam | tank access, lids and service interval |
| Inspector | Septic inspection in Coulee Dam | what gets checked and what a failure means |
| Land investor | Septic installation in Coulee Dam | 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 Okanogan County, Washington, which covers part of Coulee Dam, we have measured 14,350 parcels on septic and 6,203 on sewer. That is a county measurement. We do not hold a septic count for Coulee Dam on its own and this page does not estimate one. Coulee Dam also extends into Grant County and Douglas County, which are reported separately below and are not included in that figure.
Coulee Dam is in Okanogan, Grant and Douglas Counties, Washington.
From the Census ZCTA-to-place relationship file, with the share of Coulee Dam’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 Coulee Dam.
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 Okanogan, Grant and Douglas Counties, Washington.