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.
Naperville receives its water supply from Lake Michigan through the DuPage Water Commission. This dataset shows the average daily amount of water purchased by the City of Naperville in millions of gallons by month.
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.
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.
The Water Utility calculates the System Average Interruption Duration Index (SAIDI) to measure the reliability of the water system. This index is represented as the total number of minutes each customer can expect to be without service in a given year.