Cross-Connection Control Program
The City of Mt. Vernon delivers safe, high-quality drinking water to residents and businesses every day. Our water meets all state and federal standards and is tested regularly to ensure safety and quality. One important way we protect our water is by managing cross-connections—possible links between drinking water and non-drinkable sources. Preventing cross-connections helps keep our water supply safe.
Cross-Connection Control & Safe Drinking Water
A cross-connection happens when the drinking water system is connected to something that could be unsafe, such as a garden hose in a bucket or a swimming pool. If not properly managed, this can cause backflow, where unsafe water flows back into the clean water system.
To protect our system, the City of Mt. Vernon partners with BSI Online to manage the cross-connection control program in our community.
Frequently Asked Questions
What is the cross-connection control program?
The Illinois Environmental Protection Agency (IEPA) requires all cities to protect drinking water from possible contamination. Mt. Vernon follows this rule by working with BSI Online to manage cross-connections and keep our water safe.
What is a cross-connection and a backflow preventer?
- Cross-Connection: When drinking water is connected to something unsafe—like a hose in a bucket, pool, or chemical sprayer.
- Backflow Preventer: A device that keeps dirty water from flowing backward into the clean water system.
What can contaminate water?
- At home: Fertilizer sprayers, swimming pools, fish ponds, and animal water troughs.
- In businesses: Restaurants, medical offices.
- In factories/plants: Chemicals, fire protection sprinkler systems.
Who is responsible for backflow preventers?
Property owners must install, test, and maintain these devices. A licensed plumber must test them every year. If repairs are needed, the plumber must complete them.
Where are backflow preventers usually found?
- Lawn sprinkler systems.
- Hot water heating systems (boilers).
- Swimming pool fills.
- Fountains or decorative ponds
Why did I get a water safety survey?
The IEPA requires the City to send a short survey to all water customers every two years. The last survey was in 2024. The next one will be in 2026. All water customers must complete it.
How do I fill out the survey?
In 2026, the City will send you instructions with the survey. You will be able to return it by mail, email, or other ways.
What happens if I do not fill it out?
The survey is required by law. Failure to return it could result in fines or loss of water service.
Questions?
For more information about backflow or water safety, call the Mt. Vernon Public Works Department at 618-242-6850.
Customer Support Contacts
Water Customers
For questions about completing the survey:
- Call: 888-966-6050
- Email: support@backflow.com
Backflow Testing Companies
For assistance with testing or reporting requirements:
- Call: 800-414-4990
- Email: bsionline@backflow.com