Water Rates in San Antonio, TX

The San Antonio Water System serves San Antonio with a complex rate structure. Understanding your tiers and sewer multiplier is the first step to mitigating an unexpectedly high bill.

Effective Blended Rate

$6.08/kGal

Rate Structure

1 Tiers

flat volumetric Sewer

Last Verified

Mar 2026

Official Rate Card ↗

Volumetric Water Tiers

San Antonio volumetric water tiers and rates per thousand gallons
Tier	Usage Range (kGal)	Rate / kGal
Base (up to 100% of prior year avg)	First All volume	$1.96

Scroll horizontally to see every rate column.

Sewer & Infrastructure Logic

San Antonio calculates sewer charges using the flat volumetric method.

Flat sewer rate per kGal

Sewer Rates

All volume$4.12/kGal

At $6.08/kGal, How Much Could You Save in San Antonio?

Smart Valve technology reduces metered water volume 15-25%. At San Antonio's current rates, that's $4,378/yr in potential savings for a 300 kGal/month facility.

Calculate Your San Antonio Savings →

Monthly Base Fees (5/8" Meter)

Water Base$10.71

Sewer Base$7.36

Flat Rate Utility

San Antonio uses a flat rate structure. You are not penalized with higher rates for using more water, but conservation still lowers your bill directly!