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This table shows the meter parts replaced over the last 5 years: Reading System Appointments Water Meter Body Appointments arts replaced) arts replaced) 2019 11 3 2020 16 2 2021 28 4 2022 74 4 2023 as of 6/13 32 3 Discussion The general consensus based on available data is that a residential meter's average lifespan is 15 to 20 years. As with any mechanical device, water meters are subject to wear. Wear contributes to meter accuracy degradation, meaning that the water meters become less efficient for measuring flow and will generally under register the actual throughput. Age, as well as the total number of gallons that pass through the meter, affect the accuracy and wear on a meter. Lost water has a financial impact on the City because lost water does not generate revenue but still costs the City to pump,purchase, treat, and distribute the water and thus the taxpayers ultimately have to pay for it. Studies on the internet vary widely, but ultimately support the 15 to 20 year lifespan. One study indicated the optimum year for replacement is year 16 when a meter is at 99.2% accuracy. The accuracy of older meters varies based on the quality of water in a system as well as the type of customer using the meter. Prior to 2021,the City's unaccounted for water percentage was gradually increasing each year. The percentage unaccounted for was: 2018— 2.4% (8.0 million gallons) 2019— 3.7% (11.3 million gallons) 2020—4.1% (12.6 million gallons) We were not able to calculate unaccounted for water for 2021. The percentage for 2022 was 3.9% or 14.0 million gallons. The 14.0 million gallons in 2022 equates to lost revenue between$49,840 and $113,400 depending on which tier of the rate structure is used. Based on recent invoices, the estimated cost for residential and commercial meter parts (not including installation) are: Residential: Meter body- $70 Register- $96 Endpoint- $161 Total- $327 Page 2 of 3