In order to better align the cost the utility pays to purchase power from its supplier, a purchased power adjustment was added to the customer bills. As the price of power goes up or down, due to open market forces, the utility can raise or lower what it charges its customers to match what it pays for the power.

This dataset quantifies watermain leaks discovered during surveys of the water system utilizing acoustical listening devices. From 2013-2017 a single City-wide survey was conducted per calendar year. Beginning in 2018 two City-wide surveys were completed.

While it is important for Naperviille to compare performance year over year, it is also valuable to compare our performance against other communities both regionally and nationally. This chart benchmarks Naperville’s public safety performance as compared with other communities in the East Central region of the country and nationally. The East central region data is compiled from a random sample of survey results from 400 residents in the East Central region of the United States. The national survey is compiled from a sample of more than 4,000 residents in the continental United States.

Rates for water, and wastewater service for the City of Naperville and surrounding communities. These rates are based off of 5,610 gallons of consumption.

This dataset includes comparable governmental debt for both national and local communities. The data also include the population and total debt per capita. These communities were chosen based upon their size and location and have been historical comparisons for the City of Naperville.

Commercial Development permits issued by the City of Naperville, IL. Updated at the beginning of the month.

The City's outstanding debt service schedule. The dataset includes annual principal and interest payments for all outstanding debt.

Naperville's Electric Customer Classification.

This includes all the City's sales tax receipts including both the one percent state collected portion and the City's home rule sales from 2005 through present. The information is broken down by when the dollars were collected by the state and when the dollars were distributed to the City.

System Average Interruption Duration Index (SAIDI) Outage in Minutes. SAIDI is the average outage duration for each customer served, and is calculated as the sum of all customer interruption durations divided by the total number of customers served . SAIDI is measured in minutes or hours over the course of a year, and according to IEEE Standard 1366-1998 the median value for North American utilities is approximately 1.50 hours.