We have 3 parcels measured as septic in ZIP 77099 itself (Harris County, Texas), out of 9,366 parcels in our records for this ZIP, of which 9,363 are recorded as on sewer.
ZCTA 77099 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 | 95% | — | 128,872 | 1,412,534 |
| Fort Bend County, Texas | 5% | — | 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 3 parcels as septic in ZIP 77099 itself, out of 9,366 parcels in our records for this ZIP.
ZIP 77099 spans 2 counties: Harris County, Texas, Fort Bend County, Texas.