Mike Voth, the city's director of corporate revenue said the unfortunate situation is a combination of yearslong unnoticed water leak and a lack of access to the property. For roughly four years, the property was on an automatic billing cycle based on estimated usage, not actual water usage during that time. Once the city worker plugged in the new numbers, the difference between the paid amounts and the actual usage was realized. The culprit seems to be an upstairs toilet that was leaking for potentially years. Nguyen called a plumber and had the small leak fixed in roughly 15 minutes. "It's quite amazing what a 24-hour, seven-day-a-week leak, how much water can be used or consumed in this case," Voth said."Over the course of several years, unfortunately, that's the gap between what was billed and paid for and what was actually passing through the meter and being used."