Clearlake water and sewer rates
Who supplies water to Clearlake houses, what it costs, and how the sewer charge works.
Highlands Mutual Water Company
Rate effective May 1, 2025; the 5/8" monthly base rate has no usage allowance.
| Use a month | Price per unit (CCF, 748 gallons) |
|---|---|
| Fixed charge | $43.66 a month |
| 0 to more | $8.50 |
- Source
- Raw water source: Surface Water Treatment System; Clear Lake water quality is impacted by seasonal rainfall and algal growth.
- Violations
- The 2025 report says the company did not have any violations of an MCL, MRDL, AL, Surface Water TT, or required monitoring or reporting requirements.
Sewer
Lake County Sanitation District monthly residential rate for a house, plus its capital improvement and bond repay lines.
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.