In San Antonio, CPS Energy provides electricity for most San Antonio homes; CPS Energy is San Antonio's natural-gas utility; San Antonio Water System handles San Antonio's water and sewer. The exact lineup depends on your San Antonio address — even nearby Austin and Round Rock answer differently.
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San Antonio is one of the easier Texas cities to move to, utility-wise: decades of annexation mean most addresses inside Loop 1604 are served by the city's own utilities, and one setup covers a lot. The edges are where it changes — far north and west of 1604, subdivisions may fall under different water systems and electric co-ops.
What you set up in San Antonio depends less on where you land than on when the house was built. In the older neighborhoods ringing downtown — King William's Victorians, the craftsman blocks of Monte Vista and Beacon Hill — gas water heaters and gas ranges are common, so a gas account usually goes on the list alongside electric; CPS Energy handles gas at most addresses, though about one in five get it from CenterPoint Energy instead — check which one serves yours before moving day. Newer construction toward Stone Oak and the far North Side is more often all-electric. Electric service through CPS Energy and water and sewer through the San Antonio Water System are constants either way; the gas question is worth asking early.
| Utility | Provider | Phone | Start service |
|---|---|---|---|
| ⚡ Electricity | CPS Energy | — | Look up address |
| 🔥 Natural gas | CPS Energy | — | Look up address |
| 💧 Water | San Antonio Water System | (210) 704-7297 | Provider site |
| 🚽 Sewer | San Antonio Water System | (210) 704-7297 | Provider site |
Based on 12 sampled San Antonio addresses spanning ZIP codes 78205, 78214, 78223, 78224, 78227, 78232, 78237, 78247, 78249, 78254, 78258, 78259 (2026-07-20). Yours may differ — the San Antonio lookup is the tiebreaker.
Past Loop 1604 — especially toward Boerne, Bulverde and the far West Side — co-op and water-district territory begins, and the city-utility assumption stops holding.
The one-minute fix: run your San Antonio address through the lookup and skip the guessing.
Inside the loop, San Antonio rewards you with one of the simplest setups in Texas. Outside it, check first.
At every one of the San Antonio addresses we sampled, CPS Energy was the electric utility. The exact San Antonio provider depends on the address.
Generally no — CPS Energy territory sits outside Texas's retail-choice market, so San Antonio addresses sign up directly with the utility instead of shopping for plans.
At every one of the San Antonio addresses we sampled, San Antonio Water System was the water provider — sewer included. Other districts take over around San Antonio's edges, so check your block.
No — at most of the sampled San Antonio addresses, CPS Energy was the gas utility, but plenty of San Antonio homes are all-electric and never open this account.
At the addresses we sampled, yes — CPS Energy came back as both the electric and gas provider for most of the city, with a different gas utility appearing at a minority of addresses. Water and sewer are separate, through San Antonio Water System.
San Antonio Water System handled both water and sewer at every address in our sampling, so SAWS is the call for both kinds of emergency. Keep its number separate from CPS Energy's — they're different organizations.
Depends which side of JBSA you land on. Off-base rentals near Lackland or Fort Sam Houston are generally inside San Antonio proper, so expect CPS Energy for electric — and usually gas too, though about one in five addresses get gas from CenterPoint Energy instead — with San Antonio Water System covering water and sewer. The Randolph side is different: those suburbs sit outside the city limits, where providers shift, so run the lookup on your exact address before you report.
One minute with the San Antonio lookup above returns your San Antonio address's exact providers, phone numbers included.
Moving somewhere just outside San Antonio? Providers likely differ:
San Antonio-level lists can't be precise. Your San Antonio address can.
Find my providersSan Antonio provider data comes from our address-level utility lookup engine — 12 San Antonio sample addresses spread across ZIPs 78205, 78214, 78223, 78224, 78227, 78232, 78237, 78247, 78249, 78254, 78258, 78259, refreshed 2026-07-20. Individual San Antonio addresses vary — check yours directly. Here's how we verify San Antonio provider data.