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Section 6 2025 Urban Water Management Plan <br />Water Supply Characterization City of Pleasanton <br /> Public Draft | May 2026 <br /> 6-17 EKI Environment & Water, Inc. <br />The DERWA recycled water system has three components owned by three different agencies: <br />• DERWA owns the Pump Stations R1 (at the RWTF), R200B, and R200A, as well as Reservoirs <br />R100 and R200. <br />• EBMUD owns and operates the recycled water distribution pipeline system contained within <br />its service area and will have two pump stations and a reservoir (future facilities). <br />• DSRSD owns and operates the recycled water treatment facilities at its wastewater <br />treatment plant that treat wastewater from Dublin, South San Ramon and Pleasanton, and <br />the recycled water distribution pipeline system within its service area, along with three <br />pump stations, R300A, R300B, and R20, and two reservoirs, R20 and R300. <br />Pleasanton connects to the DERWA system near the corner of the DSRSD Dedicated Land Disposal site, <br />adjacent to Stoneridge Drive near the DSRSD RWTF. <br />6.5.1.2 Livermore Water Reclamation Plant <br />The LWRP can produce up to 6.0 MGD, or approximately 18 AF per day of recycled water. The LWRP <br />produces approximately 2,460 AFY of recycled water. Of that, Livermore uses about 2,200 AFY within its <br />municipal water service area, and Pleasanton uses the remainder. <br />6.5.2 Wastewater Collection, Treatment, and Disposal <br /> <br />Pleasanton owns and operates the community’s wastewater collection system, which serves around <br />21,000 residential and CII customers. The sewer system consists of approximately 253 miles of gravity <br />sewers, approximately 4.9 miles of force mains, 8 siphons, and 11 active pump stations. The average dry <br />weather flow (ADWF) is approximately 6 MGD (Pleasanton, 2025). Pleasanton sends the majority of its <br />sewer flows to DSRSD’s RWTF for treatment, while it sends the sewer flows from the Ruby Hill area to the <br />LWRP for treatment. When not re-used, treated wastewater effluent from both facilities is conveyed <br />through the Livermore Amador Valley Water Management Agency (LAVWMA) pipeline by the East Bay <br />Dischargers Authority (EBDA) and discharged to the San Francisco Bay. <br />6.5.2.1 DSRSD’s Regional Wastewater Treatment Facility <br />DSRSD owns and operates the RWTF, which treats wastewater from Pleasanton, Dublin, and south San <br />Ramon DSRSD by contract. The RWTF includes facilities for conventional secondary treatment, disinfected <br />tertiary recycled water, and advanced water treatment. Conventional secondary wastewater treatment <br />facilities include primary sedimentation, activated sludge secondary treatment, secondary sedimentation, <br />chlorine disinfection, and effluent pumping. The secondary treatment facilities currently have an ADWF <br />capacity of 17.0 MGD. At projected buildout, the ADWF capacity of secondary treatment facilities is <br />anticipated to be 20.7 MGD with 10.4 MGD originating from DSRSD’s own service area and the remaining <br />10.3 MGD attributed to flows from the City. <br /> CWC §10633 (a) <br />A description of the wastewater collection and treatment systems in the supplier’s service area, including a <br />quantification of the amount of wastewater collected and treated and the methods of wastewater disposal. <br /> CWC §10633 (b) <br />A description of the quantity of treated wastewater that meets recycled water standards, is being discharged, <br />and is otherwise available for use in a recycled water project.