Our Service Area
Rincon Water serves two distinct geographical areas, both of which have different potable water portfolios. These geographical areas are delineated as Improvement District 1 (ID 1) and Improvement District A (ID A). Use the resources below to determine which ID is the water system that serves your property.
- Account Number – In most cases you can use your account number. Find the first two digits of your account number.
- 01 through 48, 94, 96, and 97, your water system is in ID
- 48, 94, 96, and 97, your water system is in ID A
- Maps – You can look up the location of your property by clicking here to confirm which ID serves your property.
About ID A Water
Rincon Water purchases ID A water from the City of Escondido (City). This supplier has two sources of water. The first source is purchased from the San Diego County Water Authority (SDCWA), which purchases water from the Metropolitan Water District of Southern California (MWD). MWD imports water from two sources: a 242 mile-long aqueduct which transports Colorado River water from Lake Havasu and a 444 mile-long aqueduct that transports water from the Sacramento-San Joaquin Delta in Northern California. The second City source is local water which originates from Lake Henshaw in the San Luis Rey River Watershed. Both sources of water are blended and treated at the Lake Dixon Water Treatment Plant before delivery into the ID A distribution system.
About ID 1 Water
In previous years, the ID 1 water delivery system consisted only of 100% imported water purchased from the San Diego County Water Authority (SDCWA), which in turn, purchased this water from the Metropolitan Water District of Southern California (MWD). MWD water is imported from two sources: Colorado River water from Lake Havasu and Sacramento-San Joaquin Delta water from Northern California. The water is blended and treated at the Robert A. Skinner Treatment Plant, located in Riverside County, before being delivered into Rincon Water’s distribution system.
Since 2016, ID 1 water supplies are augmented from time-to-time with water originating from the Twin Oaks Valley Water Treatment Plant (TOVWTP). TOVWTP water is a blend of treated SDCWA water and desalinated sea water from the Claude “Bud” Lewis Carlsbad Desalination Plant (Lewis Desal Plant). Originating from the Carlsbad Agua Hedionda Lagoon, the desalinated water is a superior quality water – free of salt as well as biological and organic compounds.