La Mesa water and sewer rates
Who supplies water to La Mesa houses, what it costs, and how the sewer charge works.
Helix Water District
Rates on bills from July 1, 2026: a bimonthly fixed charge by meter size and a charge per unit (one unit is 748 gallons), each the Helix charge plus the San Diego County Water Authority charge; for the single-family class the tiers are 0-12, 13-26 and 27 or more units per bimonthly bill.
| Use a month | Price per unit (CCF, 748 gallons) |
|---|---|
| Fixed charge | $39.58 a month |
| 0 to 6 units | $7.69 |
| 6 to 13 units | $8.06 |
| 13 to more | $9.61 |
- Service area
- The district distributes water to 279,000 people in the cities of La Mesa, El Cajon and Lemon Grove, and unincorporated areas including Spring Valley, Mt. Helix and Lakeside.
- Treatment
- In 2025, 99.4% of the water Helix customers received was treated at the R.M. Levy Water Treatment Plant in Lakeside.
- Lead
- Helix does not have any lead pipes or service lines within its distribution system.
Sewer
The city takes care of all sewer services; sewer charges are collected by the county of San Diego and are incorporated into your property taxes.
Pay or manage it
Sources
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.