Social Services Bldg Water Mgmt Study

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WATER CONSERVATION OPPORTUNITIES Observations made during the site visit, as well as information obtained from discussions with personnel familiar with the facility, aided in the identification of water conservation opportunities. Potential water savings and resulting cost savings may be realized in domestic usage. The following cost factors were used to compute the potential measures: .. savings of water conservation .. Water cost of $0.60 per 1000 gallons. Sewer cost of $1. 77 per 1000 gallons of water used. Electrical energy cost of $0.0609 per kilowatt-hour. Natural gas energy cost of $0.3401 per hundred cubic feet. .. .. Domestic Use - The largest water usage identified at the facility was domestic use, amounting to over 88 % of total usage. Two water conservation measures could be implemented to reduce domestic water consumption; installation of flow-restrictors on flush valve toilets and 1.0 gpm faucet aerators on all sink faucets. The following summary identifies the potential water, sewer and energy savings as well as estimated investment costs for these modifications. .. This facility is equipped with Zurn flush-valves on toilets and urinals. Installation of flow restrictors would reduce water consumption by about 1 \2 gallon per flush. This would result in a water savings of approximately 225,000 gallons per year. The annual water and sewer savings associated with this reduction in usage is $533. Material and labor costs for installing these retrofit devices for 88 flush valves is estimated at $15 each, or a total of $1320. .. The installation of 1. 0 gpm faucet aerators will also result in water and sewer savings, along with energy savings associated with water heating. Reducing faucet flows would result in an annual water savings of approximately 223,000 gallons. The annual savings in water and sewer costs from this retrofit, for 44 faucets, is estimattid at $528. Assuming 1/4 of the water used is hot water, an additional savings of $609 in energy costs could be anticipated each year. Table 2 lists the approximate costs of retrofit and the time period required to recover those costs.