Corona water and sewer rates
Who supplies water to Corona houses, what it costs, and how the sewer charge works.
City of Corona Utilities Department
The City of Corona Utilities Department bills water as a fixed Ready to Serve charge by meter size plus commodity charges per hundred cubic feet (hcf) in four tiers set by your water budget: Tier 1 for efficient indoor use, Tier 2 for efficient outdoor use, Tier 3 for 1% to 50% over budget and Tier 4 for 51% and over.
| Use a month | Price per unit (CCF, 748 gallons) |
|---|---|
| Fixed charge | $46.80 a month |
| 0 to 7.5401 units | $2.13 |
| 7.5401 to 23.3001 units | $3.60 |
| 23.3001 to 34.9502 units | $4.77 |
| 34.9502 to more | $5.69 |
- Source
- In 2025, City of Corona groundwater wells provided 45.5% of Corona's water, 49.6% came through Lake Mathews from the Colorado River and 4.9% from the State Water Project's California Aqueduct.
- Hardness
- Average hardness in the system is 146 ppm or 8.5 grains per gallon, which the 2026 water quality report classifies as hard.
- Lead
- Lead at household taps (2023 sampling): the 90th percentile of 53 sites was 5 ppb, against a 15 ppb action level; 3 sites exceeded it.
- Monitoring
- During 2016-2025 the City did not complete all required monitoring at Standby Wells 03 and 21, which were not delivering water to the system; the required samples were taken in March 2026.
Sewer
Corona's Utilities Department bills homes a residential fixed sewer charge of $50.01 per dwelling a month (effective January 1, 2026); only non-residential customers pay an extra charge for water used beyond 8 units.
Ways to pay less
- More than four people? Ask for a bigger water budget. Each single-family home gets a default indoor water budget for four people. Homes with more residents, or that repaired a leak, may need a water budget variance. How: Submit a residential variance form to Corona Utilities (online, by mail or email).
- Water-saving rebates. Corona Utilities lists rebates of up to $175 per premium high-efficiency toilet (up to 8 per property) and up to $250 per weather-based irrigation controller (up to 2), while funding lasts. How: Apply at SoCalWaterSmart.com.
Pay or manage it
Sources
- City of Corona: residential water rates
- City of Corona 2024 water, reclaimed water and sewer rate study
- City of Corona: water budget adjustment
- City of Corona: tiered rates and water budgets
- City of Corona: water service
- City of Corona: sewer rates
- City of Corona: residential water rebates
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.