In Grant County, Washington, which covers Mattawa, we hold 15,176 septic records. Parcels there are not yet classified septic against sewer, so this page reports documents held and nothing beyond them.
Mattawa is a city in Grant County, Washington. The Census Bureau puts its internal point at 46.73641, -119.905305 and its land area at 1.00 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 |
|---|---|---|---|---|---|
| Grant County | 15,176 | none held | none held | county portal | account or login required |
We hold 15,176 septic records for Grant County, Washington. That is a substantial partial collection rather than a complete one, so a Mattawa property may or may not appear in it, and the county archive remains the authority. 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 Mattawa | keeping the system you have working |
| Buyer or seller | Buying or selling in Mattawa | what to pull and check before closing |
| Realtor | Buying or selling in Mattawa | the same records a seller needs on file |
| Installer or contractor | Septic installation in Mattawa | site evaluation, permit sequence, inspection |
| Septic pumper | Septic pumping in Mattawa | tank access, lids and service interval |
| Inspector | Septic inspection in Mattawa | what gets checked and what a failure means |
| Land investor | Septic installation in Mattawa | 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 Grant County, Washington, which covers Mattawa, we hold 15,176 septic records. Parcels there are not yet classified septic against sewer, so this page reports documents held and nothing beyond them.
Mattawa is in Grant County, Washington.
From the Census ZCTA-to-place relationship file, with the share of Mattawa’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 Mattawa.
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 Grant County, Washington.