Otay Water District

Provider briefing

How this utility’s billing works

Otay Water District operates as a public water authority serving East County San Diego and South Bay communities served by the District, including Spring Valley, Bonita, Jamul, Rancho San Diego, eastern Chula Vista, Otay Mesa, and adjacent unincorporated areas. Customers should use the provider’s current account-specific bill and official customer-service instructions as the final authority for deadlines, balances, and service requests.

The published water-rate framework is described as Increasing-block residential rates billed by 100-cubic-foot billing units, with one unit equal to 748 gallons, plus fixed wholesale and monthly system charges and, where applicable, elevation-based energy and improvement-district charges. Effective with bills mailed January 1, 2026, residential variable rates are $6.66 per unit for units 1–9, $7.23 for units 10–12, and $8.03 for unit 13 and above. A conservation/lifeline treatment historically applies the lowest rate to the first five units when total monthly use is below ten units; customers should rely on the current rate sheet and bill for the exact application. The 2026 potable energy charge is $0.092 per unit per 100 feet of lift above the 450-foot base elevation.. Bills are generated monthly. water bills are sent within approximately one week after the meter is read on a geographic route, and the delivery date generally remains consistent for the property. sewer-only customers receive a bill around the middle of each month. the ami deployment does not change the monthly billing schedule., and a typical residential cost reference is For a typical 3/4-inch residential meter using 5,000–7,000 gallons, approximately 6.7–9.4 billing units, the 2026 variable water charge is about $44.50–$62.35, plus the $23.89 monthly MWD/County Water Authority fee, $22.88 residential monthly system fee, applicable elevation energy charge, and any improvement-district or other district charge. A reasonable water-only planning range is approximately $95–$120 before sewer and location-specific add-ons. When Otay sewer applies, a 5,000–7,000-gallon home often produces a combined water-and-sewer bill roughly in the $140–$175 range, while Chula Vista sewer customers follow the City’s separate schedule shown on the Otay bill.. These descriptions are useful planning benchmarks; actual charges can change with meter size, usage, sewer averaging, local taxes, drought stages, or account-specific fees.

Wastewater and sewer calculation

For residential customers receiving Otay sewer, the 2026 formula uses the average of the prior three years’ winter averages. Each winter average is January–April billed units divided by four; the result is reduced by 21% because not all purchased water enters the sewer system. The bill is calculated as ((three-year winter-average units × 0.79) × $3.92 usage fee) + monthly system fee. The 2026 residential monthly system fee is $21.60 for a 3/4-inch meter and $33.32 for a 1-inch meter. New customers without an established winter average are billed using the District average of 9.5 HCF, and the reduced winter average is capped at 30 HCF. Multi-residential accounts use a 12% reduction, or ×0.88, with the same $3.92 usage fee and meter-size system fees. Otay does not provide sewer inside the City of Chula Vista; those customers see Chula Vista sewer charges on the Otay bill and should call Chula Vista at (619) 476-5380.

Meter and infrastructure notes

Water meters are historically read monthly on geographic routes, with bills mailed within about one week of the read. Otay launched a systemwide Advanced Meter Installation Project in early 2026: existing 3/4-inch through 2-inch meters are being replaced with Badger Meter ORION Cellular AMI endpoints installed by Professional Meters, Inc. The project is expected to run through summer 2031; initial deployment replaces approximately 500 meters, with later phases providing detailed usage and leak detection. Customers receive postcard and email/phone notice roughly two weeks before installation, do not need to be home or schedule an appointment, and should clear access. Installation normally takes about 30 minutes and briefly interrupts water. AMI will reduce manual reads and transmit frequent data for abnormal-usage alerts; customer portal access to detailed consumption is planned for the mid-to-late 2027 portal upgrade.