Rialto water and sewer rates
Who supplies water to Rialto houses, what it costs, and how the sewer charge works.
City of Rialto (Rialto Water Services)
City of Rialto / Rialto Utility Authority rates effective March 1, 2026: a monthly minimum charge by meter size plus three tiers per ccf (0-9 units, 10-30 units and 31+ units); the City Council adopted the rates on January 27, 2026.
| Use a month | Price per unit (CCF, 748 gallons) |
|---|---|
| Fixed charge | $37.30 a month |
| 0 to 9 units | $2.11 |
| 9 to 30 units | $2.37 |
| 30 to more | $3.45 |
- Source
- In 2025, 75% of Rialto's potable drinking water came from its groundwater basins, 15% from the Baseline Feeder and 10% was surface water.
- Hardness
- Hardness in City of Rialto water averaged 160 mg/L (range 130 to 220) in the 2025 report.
- Perchlorate
- Two City wells have wellhead treatment that removes perchlorate to a non-detection level; other wells affected by perchlorate have been out of service since the detection.
- Lead
- A 2024 lead service line inventory found the service lines were lead free.
West Valley Water District
West Valley Water District, rates effective January 1, 2026, billed monthly: a monthly service charge by meter size plus three tiers per hundred cubic feet (1-10 units, 11-30 units, over 30 units).
| Use a month | Price per unit (CCF, 748 gallons) |
|---|---|
| Fixed charge | $23.82 a month |
| 0 to 10 units | $2.33 |
| 10 to 30 units | $2.54 |
| 30 to more | $2.73 |
- Source
- In 2025, 44.0% of WVWD's supply came from its own groundwater wells, 13.1% was groundwater bought from San Bernardino Valley Municipal Water District, 24.5% was Lytle Creek surface water and 18.4% was State Water Project water.
- Lead
- Lead at household taps (2024 sampling at 40 sites): 90th percentile not detected, 0 sites over the action level.
Sewer
Rialto Water Services bills sewer as a flat monthly charge per residential unit: $69.16 for single-family homes from March 1, 2026. Residents within West Valley Water District pay sewer only to Rialto Water Services.
Ways to pay less
- Seniors 65+ and low income: 20% off sewer. Customers aged 65 and over, or households with incomes at or below the Low-Income Limits, may qualify for a 20% discount on the Total Sewer Flat Rate. How: Call (909) 820-2661 for more information and how to apply.
- Water rebates (City of Rialto water). The City's rebate program covers high-efficiency toilets (limit 2 per household), a high-efficiency washing machine, a weather-based smart irrigation timer, high-efficiency or shut-off nozzles and turf replacement (pre-inspection required), first come, first served. How: Fill out the City's Water Rebate Application; questions: Utilities Division, 909-820-2525, ext. 2062.
Dates
| When | What |
|---|---|
| Jan 1, 2027 | Next scheduled City of Rialto rate step: the 3/4-inch water minimum charge goes from $37.30 to $40.29 a month and the residential sewer charge from $69.16 to $71.24. |
Pay or manage it
- Pay your Rialto Water Services bill ↗
- Start or stop Rialto water and sewer service ↗
- Which water provider serves you ↗
Sources
- City of Rialto: water and sewer services
- City of Rialto: water and sewer/wastewater rates
- City of Rialto 2025 drinking water quality report
- West Valley Water District: 2025 rate study
- West Valley Water District: rates and fees, January 1, 2026
- West Valley Water District 2025 water quality report
- City of Rialto: water and wastewater rate study (October 2025)
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.