City of Warren Residential Cross Connection Program

Purpose:
To prevent contamination of the public water supply by identifying and eliminating potential cross connections, as required by Michigan Public Act 399.

What is a Cross Connection?
A plumbing arrangement that could allow contaminated water (e.g., sewage, chemicals) to flow backward into your drinking water due to backflow.

What Residents Need to Know:

Required Inspection

• Mandatory for all homes in Warren (State law).
• Begins October 2025 and will take several months to complete.
• Residents will be notified when inspections will take place in their neighborhood.
• Inspection takes 10–15 minutes.

Who Will Perform Inspections?

• City of Warren Water Department Customer Service Crews.
• Crews will be in City vehicles and carry City ID badges.

Inspection Details:

• Includes interior and exterior of the home.
• Homeowners must be present.
• Crews need access to:
  • Front and back yard
  • Inside the home

What You Can Do Before the Inspection:

• Check your garden hose for a Hose Bibb Vacuum Breaker.
  • These prevent the most common cross connection issue.
  • Can be purchased at local hardware stores.

How to Prepare:

1. Fill out the Cross Connections Questionnaire
   • Include your phone number.
2. Return it to:
   • By Mail or Dropbox:
     • City of Warren Water Department
       12821 Stephens, Warren, MI 48089
     • Label: “Cross Connections Program”
3. OR call to schedule:
   (586) 759-9200

After Inspection

• If modifications or testing of backflow devices are needed, you will be notified.
• Questions? Call the Water Department at (586) 759-9200

More Info Available:

1. 2025 Cross Connection FAQ
2. 2025 Cross Connection Letter to Residents
3. 2025 Cross Connection Cross Connection Survey