We have 360 parcels measured as septic in ZIP 77520 itself (Harris County, Texas), out of 13,642 parcels in our records for this ZIP, of which 13,282 are recorded as on sewer.
ZCTA 77520 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 | 96% | — | 128,872 | 1,412,534 |
| Chambers County, Texas | 4% | — | — | — |
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 360 parcels as septic in ZIP 77520 itself, out of 13,642 parcels in our records for this ZIP.
ZIP 77520 spans 2 counties: Harris County, Texas, Chambers County, Texas.