El Cajon water and sewer rates

Who supplies water to El Cajon 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

For most sewer customers, sewer service charges are paid with the County property tax bill, which is due in two (2) equal installments by December and April.

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.