ZIP 78644 falls in Caldwell County, Texas, where we hold 8 septic-related documents. We have not classified septic-versus-sewer status for this county, and we do not have a per-ZIP parcel count -- see the county page for what we hold and where the records are kept.
| County | Land in this ZIP | Documents held | On septic (county) | On sewer (county) |
|---|---|---|---|---|
| Caldwell County, Texas | 100% | 8 | — | — |
3 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 |
|---|---|---|---|
| Graham Construction & Land Clearing | Lockhart | (512) 882-2316 | 5.0 (5) |
| 7H Construction and Septic | Lockhart | (512) 999-0495 | — |
| Apex Septic | Lockhart | (512) 227-1828 | — |
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 not measured septic-versus-sewer status for this county yet.
ZIP 78644 falls in Caldwell County, Texas.