Atascadero water and sewer rates
Who supplies water to Atascadero houses, what it costs, and how the sewer charge works.
Atascadero Mutual Water Company
Effective 6/15/2026, single-family customers pay a $36.00 minimum monthly rate for a 3/4 inch meter, tiered rates per thousand gallons, a $5.00 NWP surcharge and $1.50 per 1,000 gallons for PFAS treatment.
| Use a month | Price per 1,000 gallons |
|---|---|
| Fixed charge | $41.00 a month |
| 0 to 10 thousand gallons | $5.30 |
| 10 to 25 thousand gallons | $7.10 |
| 25 to 50 thousand gallons | $9.20 |
| 50 to 75 thousand gallons | $10.10 |
| 75 to more | $13.00 |
- Source
- AMWC's water sources are groundwater from the Atascadero Basin, the underflow of the Salinas River, and Lake Nacimiento (via the Nacimiento Water Project pipeline).
- Lead
- The 2024 survey of AMWC's system found no lead service lines.
- Pumping surcharge
- Properties in a pumping surcharge area are subject to an additional 15%.
Sewer
The City bills a fixed sewer service charge on the San Luis Obispo County property tax bill; the single-family charge is $67.60 a month from July 1, 2026 ($57.06 before).
Pay or manage it
Checked October 22, 2026. Every number here comes from the public sources listed, matched by our checker.
Rates change every year; this page shows when it was last checked. Nothing here is legal, tax or insurance advice.