We have 28 parcels measured as septic in ZIP 77503 itself (Harris County, Texas), out of 6,887 parcels in our records for this ZIP, of which 6,859 are recorded as on sewer.
| County | Land in this ZIP | Documents held | On septic (county) | On sewer (county) |
|---|---|---|---|---|
| Harris County, Texas | 100% | — | 128,872 | 1,412,534 |
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 28 parcels as septic in ZIP 77503 itself, out of 6,887 parcels in our records for this ZIP.
ZIP 77503 falls in Harris County, Texas.