Ordinance No. 1454-23 Water Supply Facilities Work Plan Comprehensive Plan Amendment

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2.5 ABSORPTION OF EXISTING WATER SYSTEMS Smaller, independent, and Pasco County-served systems that will potentially be served by the City were not added to the future demands. Others currently provide WUP and treatment capacity for such systems. If the City absorbs such systems, the WUP and treatment capacity from these other systems would likely be transferred to the City. 2.6 PROJECTED WATER DEMAND Jones Edmunds projected populations using SWFWMD's GIS parcel database. For parcels with residential development information provided by the City, we replaced the parcel information with the projected population and buildout information in Tables 5 through 6. Table 8 compares the residential development-projected population numbers to the SWFWMD parcel database. Table 9 shows the total USA projected population. Table 10 compares the demand projections in the RWSP and those projected using the residential development information. The projected total water demand depends on the gpcd use within the USA. The residential development-based projections are based on the WUP compliance limit of 87 gpcd. Although the RWSP projects a lower 2040 population, the RWSP assumes 98 gpcd, resulting in a projected demand like the demand calculation assuming the approved developments in Table 4. The demand projections in Table 10 assume a future residential/commercial demand ratio similar to historical use. As discussed in Section 2.4, the City expects additional commercial/industrial demands from the airport redevelopment and increased demands from BTB. Table 11 compares the minimum commercial need with the commercial demand projected assuming commercial use will equal 28% of the total demand based on the average 2016 through 2021 residential/commercial ratio. Table 11 shows the commercial need to exceed the historical ratio. Table 12 shows the projected water demand with the additional projected commercial use. Figure 2 compares the projected water demands to the WUP and the Public Water Supply System treatment capacity. 2.7 RECLAIMED WATER DEMAND The City's WUP requires the City to send 2.804 MGD to the rapid infiltration basins (RIBs) at the City's Wastewater Treatment Facility (WWTF) at full capacity of the WUP (3.308 MGD). This is equal to approximately 85% of the withdrawal amount. The Zephyrhills WWTF has a permitted treatment capacity of 4.5 MGD annual average daily flow (AADF) and a total effluent disposal capacity of 3.85 MGD AADF. The October 2020 through September 2021 AADF to the WWTF was 1.676 MGD with 0.302 MGD (18%) of the reclaimed (reuse) water distributed in the USA for irrigation purposes and 0.058 MGD (3%) used at the WWTF. The City sent the unused 79%to the four RIBs at the Zephyrhills Municipal Airport. 26110-046-01 February 2023 2-6 Water Demand