New Water Treatment Facility
The City of Waterloo is proud to announce the grand opening of its brand-new water treatment facility, a milestone achievement of a comprehensive infrastructure project that also includes the construction of a modern water tower, which was completed in the fall of 2024. Together, these advancements represent a transformative investment in the community’s health, sustainability and future growth.
This state-of-the-art water treatment facility is designed to meet the needs of our growing population while adhering to the highest environmental and technological standards. With a processing capacity of 3.2 million gallons per day, the facility ensures safe, clean, and reliable water for residents and businesses throughout Waterloo.
Water Operations
The City of Waterloo is committed to providing our residents with safe, drinkable water. The city is responsible for your water service up to the curb stop.
To help off-set any shortages and/or pressure reductions that may occur, the city maintains 1 million gallons of water storage. Our water operators are fully trained and certified to meet the Illinois Environmental Protection Agency regulations.
- Continuous Water Sampling
- Monitor Daily Chlorine Residuals
- Fire Hydrant Flushing
- Valve Exercising
- Repair Existing Water Mains
- Install New Water Mains
To keep you informed, we publish a Consumer Confidence Report - 2023 annually. These reports are full of important information regarding drinking water quality, systems management, statistical data, and water conservation. For a paper copy of the report either download and print or call 618-939-8600 ext. 225.
In addition, the City of Waterloo adheres to the Illinois Environmental Protection Agency’s guidelines regarding Backflow Prevention Devices. A survey is mailed to each water customer on a biennial basis and the customers’ compliance with inspections is required on an annual basis.
IEPA Links
City of Waterloo Public Water Supply System Details and Information
Routine Monthly Samples (Coliform/Microbial Sample Results)
Water Treatment Facility Daily Testing & Operating Logs
Become Water Smart
Imagine that the dot inside these brackets [•] is the only hole in your home’s water system. By its size alone, that hole may not seem worth tracking down. But that hole can waste more than 4,000 gallons of fresh water each month — enough water to take a shower every day for a year!
- Regularly check your toilet, faucets, and pipes for leaks.
- Turn off the tap while brushing your teeth or washing dishes in the sink.
- Insulate exposed water pipes with pre-slit foam insulation.
- Run dishwashers and clothes washers only when they are full
Conserve Water & Save Money
Customer Information
To establish service, residents must apply and pay a deposit at City Hall. Security deposits are refunded automatically after twelve months of consecutive timely payments. When an account is closed, the deposit is applied to the final balance. For customers who do not have a balance, a payment refund check is issued. Residents are required to notify City Hall when closing out an account.
For more information, call 618-939-8600 and press zero to speak to the Business Office.
Water Department
