We have 158 parcels measured as septic in ZIP 77031 itself (Harris County, Texas), out of 3,783 parcels in our records for this ZIP, of which 3,625 are recorded as on sewer.
ZCTA 77031 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) |
|---|---|---|---|---|
| Harris County, Texas | 99% | — | 128,872 | 1,412,534 |
| Fort Bend County, Texas | 1% | — | 20,399 | 352,341 |
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 158 parcels as septic in ZIP 77031 itself, out of 3,783 parcels in our records for this ZIP.
ZIP 77031 spans 2 counties: Harris County, Texas, Fort Bend County, Texas.