| Business | Phone |
| Lockhart City Water Plant Old Mcmahan Rd, Lockhart 78644 | (512) 398-3528 |
| Lockhart Water Dept 705 Wichita St, Lockhart 78644 | (512) 398-3615 |
| Mc Mahan Water Supply Corp 916 N Blanco St, Lockhart 78644 | (512) 398-6806 |
| Polonia Water Supply Corp 354 Old Lytton Springs Rd, Lockhart 78644 | (512) 398-4757 |