We have 1,154 parcels measured as septic in ZIP 99004 itself (Spokane County, Washington), out of 5,096 parcels in our records for this ZIP, of which 1,349 are recorded as on sewer.
ZCTA 99004 is not entirely inside one county. Land-area share is from the 2020 Census ZCTA-to-county relationship file.
| County | Land in this ZIP | Documents held | On septic (county) | On sewer (county) |
|---|---|---|---|---|
| Spokane County, Washington | 96% | 27 | 36,413 | 127,463 |
| Whitman County, Washington | 4% | 49 | 4,266 | 9,252 |
2 businesses on record with an address in this ZIP: pumping, installation, design, inspection and repair. Not an endorsement, and we take no fee.
| Company | City | Phone | Rating |
|---|---|---|---|
| Dow Excavating | Cheney | (509) 235-4511 | 5.0 (2) |
| 509 Excavation | Cheney | (509) 954-0545 | — |
Land-area overlap is from the 2020 Census Bureau ZCTA5-to-county relationship file, not an estimate of ours. Parcel and document counts are rows we hold, not a survey of every property in the ZIP. Last verified 2026-09-01.
We have measured 1,154 parcels as septic in ZIP 99004 itself, out of 5,096 parcels in our records for this ZIP.
ZIP 99004 spans 2 counties: Spokane County, Washington, Whitman County, Washington.