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Water TowerDrinking Water Quality Reports

The City of Joliet Public Utilities is dedicated to ensuring that our residents are provided with safe, drinkable water. To keep you informed, we annually publish our Drinking Water Quality Reports. These reports are full of important information regarding drinking water quality, systems management, statistical data, and water conservation. Click on the Report below that you wish to view.

In 2019, the City of Joliet took over operation and maintenance of the Lockport Township Water System.  In 2022, the system was connected to the City of Joliet water supply.  Until the water systems are combined, the City of Joliet is required to publish a separate Drinking Water Quality Report for the Lockport Township Water System.  Click on the links below to view these reports.

Water System includes Wastewater System includes
677 miles of water main
11 water treatment plants
10 water reservoirs
26 active wells
7 water pumping stations
8,741 fire hydrants
8,759 water main valves
over 46,938 service valves		 601 miles sanitary pipe
556 miles storm sewer
48 pumping stations
13,823 sanitary manholes
38,654 storm water structures
3 wastewater treatment plants

Facility Map [PDF] - map of Joliet water facilities, sewer pumping stations and wastewater treatment plants.

How it Works! Water System Schematic

System Schematic

Per- and Polyfluoroalkyl Substances (PFAS)

Per- and polyfluoroalkyl substances (PFAS) are chemicals produced in the United States since the 1940s. They are used for applications ranging from firefighting to stain and waterproofing of consumer products, such as carpet, clothing, and food packaging. Some PFAS are no longer made due to environmental and human health concerns, but they persist in the environment and may contaminate surface waters and groundwaters near sites where they were made or used. Newer PFAS continue to be produced in the U.S., even though little is known about their potential effects on human health and the environment.

Most of what is known about PFAS-related health effects comes from studies of humans and animals exposed to perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS). PFOA and PFOS are no longer produced in the U.S. but continue to be detected in human blood. Newer PFAS that remain in production are also detected in human blood. Exposure to high levels of PFAS in contaminated drinking water may result in the following health effects:

  • Increased cholesterol levels
  • Changes in liver enzymes
  • Hormone disruption and increased risk for thyroid disease
  • Decreased odds of women becoming pregnant
  • High blood pressure or pre-eclampsia during pregnancy
  • Small decreases in infant birth weights
  • Decreased vaccine response in children
  • Increased risk of kidney or testicular cancers

For more information, please visit https://epa.illinois.gov/topics/water-quality/pfas.html

In 2020, the Illinois Environmental Protection Agency sampled the City’s treated water for 18 PFAS chemicals and found that none of the contaminants were present at concentrations greater than or equal to the minimum reporting levels.  Complete sampling results are available here.

Lockport Township PFAS sampling results are available here.

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