Petaluma water and sewer rates
Who supplies water to Petaluma houses, what it costs, and how the sewer charge works.
City of Petaluma
City of Petaluma rates effective July 1, 2026, billed monthly: a $23.37 fixed monthly service charge for a 5/8" to 3/4" meter plus, for single-family homes, $6.43 per hcf for the first 4 hcf, $7.02 from 4.01 to 8 hcf, $7.87 from 8.01 to 16 hcf and $9.01 above 16 hcf
| Use a month | Price per unit (CCF, 748 gallons) |
|---|---|
| Fixed charge | $23.37 a month |
| 0 to 4 units | $6.43 |
| 4 to 8 units | $7.02 |
| 8 to 16 units | $7.87 |
| 16 to more | $9.01 |
- Source
- Petaluma buys its water from Sonoma Water; it comes from Lake Pillsbury, Lake Mendocino and Lake Sonoma by way of the Russian River and is collected 80 feet below the sand beds beside the river. The City also keeps a supply of local groundwater from wells more than 400 feet deep.
- Hardness
- Total hardness in 2025 averaged 170.60 ppm in the City's water (range 61 to 320) and 109.83 ppm in Sonoma Water's supply.
- Lead
- In the 2023 tap sampling, the 90th percentile lead level was 2.4 ppb and 0 of 30 sites were above the lead action level.
- PFAS
- The City of Petaluma says it will begin PFAS testing in 2026.
Sewer
The City of Petaluma bills sewer monthly with water. From July 1, 2026 a single-family home pays a $45.80 fixed service charge plus $10.85 per hcf, charged on the household's average winter water use or actual use, whichever is lower. The City says the average household uses about 5 hcf a month in winter.
Ways to pay less
- Sewer lateral replacement grant. The City's Sewer Lateral Replacement Grant pays 50% of the approved cost of replacing or repairing your private sewer lateral, up to $2,000. Only a complete replacement, or a repair that completely eliminates infiltration and inflow, qualifies; funds are first-come, first-served each fiscal year. How: Submit the application with your paid invoice to the City's Water Resources & Utilities Department (202 North McDowell Blvd), in the same fiscal year (July 1 to June 30) as the replacement.
- $75 rebate for a high-efficiency clothes washer. Residential water or sewer customers who replace a top-loading washer with a qualifying high-efficiency front-loading washer can get a $75 rebate from the City. How: Apply through the City of Petaluma's water conservation rebate programs.
Pay or manage it
Sources
- City of Petaluma: summary of water and wastewater rates effective July 1, 2026
- City of Petaluma: water and sewer billing
- City of Petaluma 2025 Annual Water Quality Report
- EPA water system boundaries (Petaluma)
- City of Petaluma: sewer lateral replacement grant
Checked October 21, 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.