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GHG emissions associated with water and wastewater used by cities ' facilities Cloverdale Cotati Healdsburg Petaluma Rohnert Park Sebastopol Sonoma Windsor FY 00 - 01 3 28 26 185 36 12 48 96 FY 01 - 02 3 28 26 181 36 11 48 95 municipal operations ' buildings and parks . We used the proportion of each city 's indoor and outdoor water usage to estimate the vol - ,:. >xxs g � To protect the environment, I ume of wastewater each produced . For those cities receiving water <F.:: `"«` ` ry">�E = �"�> <> think adults need to think more from the Sonoma County Water Agency, a portion of SCWA's energy ' . ... . about their children and each � �� . . •. . was allocated to them, based on volume . Similarly, for the cities thatq other. Now people are too focused send wastewater to the Laguna Wastewater Plant, a portion of the on themselves . plant's energy was allocated, also based on volume . —Geoff Fisher, Sebastopol, age 14 Regarding ways to reduce GHG emissions associated with water and wastewater, metering and record keeping at municipal facili - ties is recommended to help track the impact of efficiency im - provements, and help reduce waste, costs, and emissions . Looking can help estimate the cost-effectiveness of replacements, and sup - beyond cities ' internal operations to the community level , a rela - port applications for low interest loans from the California Energy i tively easy and cost-effective way to reduce emissions is to replace Commission . energy- inefficient equipment . The database created for this project i Examples of projects that can both reduce GHG emissions and gen- erate considerable savings follow. Upgrades to the aeration blowers BAZARRO Dan Piraro at the Laguna Wastewater Treatment Plant are already saving $ 175 per ton of GHG reduced . Another Laguna Treatment project to up- Our expended faree.2st ITICIU&S0 grade pumps could save $ 290- 320 per ton of GHG . Upgrading the P9 9 ol� a1 WIQrmin � , tie c�t�� sfix hid y County Agency pumps i o� efficient of the main Sonoma Coun Water A enc um s could P..i'1d of the hum� � re . �b�(* to save an estimated $ 320 per ton of GHG . Our analyses also show skies, that landscape irrigation efficiency offers another huge opportu - tq� �e pity for reducing energy use and GHG emissions . Were SCWA to a implement such ever - efficient projects, the Agency 9Y Yj P � 9 Y could be a tovard. "ViromexU conceals . stellar model for GHG reduction among water agencies nationwide . �2C U TIA I Even larger reductions in GHG emissions and costs can be realized by t stepping up to an arena with greater impact—infrastructure . As is true with any construction , optimum performance is realized first in ' ✓ ect j ro the 's design h P g phase . Our database and analyses offer an op - v portunity to conduct a comprehensive evaluation of options for both x SCWA's water supply plans and the Laguna Plant's water capacity projects . In particular, analysis of the data could help identify opti - „� mum ways to balance water efficiency, wastewater treatment ca - n pacity, water supply, and wastewater reclamation, while simultane- f� % ously reducing energy costs and GHG emissions . A joint effort to consider these infrastructure plans with the goal of identifying cost- 1 B � - effective reductions in GHG emissions Ij,�I �RO, CQM � ss ons could help cut through the 8 F 015 complexity of these massive undertakings . Full report on Water and Wastewater by John Rosenblum , Ph . D, Provimetrics, posted online at www. skymetr1cs. us 9