- City Government
- Water, Stormwater & Wastewater
- Water Services
- Water Backflow Prevention Program
Water Backflow Prevention Program
The City of St. Peters is committed to public health, safety, and environmental compliance. As a water service provider, the City is required by federal and state law to protect the public water supply by implementing and administering a Cross Connection Control (Backflow Prevention) Program.
The backflow prevention program requires all connections to the public water supply to be equipped with an approved device to prevent water from reentering the public water main. This device must be inspected annually by a backflow prevention tester certified by the Missouri Department of Natural Resources. As the regulating agency, the City of St. Peters is required to maintain a record of these devices and their operating condition.
June 1 Report Deadline & Late Policy
- An annual inspection report for each backflow prevention device is due to the City of St. Peters by June 1 on an annual basis.
- A late fee of $30 per device will be charged to the customer's water bill for any backflow test report(s) not received by June 1 annually.
- Any backflow reports not received within 60 days of the June 1 annual inspection date shall be disconnected from the public water system until satisfactory report(s) are received and all applicable fees are paid.
- An approved backflow prevention device shall be installed on the domestic water supply for all retail, commercial and industrial facilities.
- In the event your backflow prevention assembly fails, the certified report(s) must be submitted to the City of St. Peters immediately. The failed device must then be repaired or replaced and an updated test report submitted to this office within 10 business days. This replacement device must meet current City of St. Peters code and ordinance requirements. A permit and inspection are required for any new or replacement devices.
Program Administrative Fee
St. Peters water customers with a backflow prevention device are billed an administrative fee of $2 per billing cycle ($12/year) per backflow prevention device.
St. Peters ordinance requires you to maintain records of your backflow prevention device from purchase to retirement. If a device is removed from service, proof of proper disconnection and cap off shall be provided to the City of St. Peters.
- If you have any questions regarding backflow protection at your business or residence, call the City of St. Peters at 636-477-6600, ext. 1278, or send us an email.
- Read the City of St. Peters' code pertaining to backflow prevention devices on the public water system.
- Learn more from the Missouri Department of Natural Resources about backflow prevention.
- Search the Missouri Department of Natural Resources list of state-certified testers.
- What does this program mean for public health?
Backflow prevention devices help protect you and our community by preventing potentially contaminated water from coming back through water supply systems and into your home, business, or the public water supply.
- When would a residence need backflow prevention?
If you have a lawn irrigation system at your home, you are required by the Missouri Department of Natural Resources to:
- Have an approved backflow prevention device
- Have the device tested annually
- What does this program mean for commercial businesses?
- An approved backflow prevention device shall be installed at ALL potable water service lines entering the premises of all retail, commercial, and industrial facilities.
- An approved backflow prevention device shall be installed at any non-potable auxiliary water service connection within any facility where food services and public drinking fountains are present including:
- chemical feed systems or soap additive devices
- carbonated fountain machines
- ice machines
- steam tables
- laundry machines
- boiler feed systems
- An approved reduced pressure zone (RPZ) backflow prevention device shall be installed on all lawn irrigation and all fire protection systems with chemical additives present. An approved RPZ or double-check (DC) backflow prevention device shall be installed on all fire protection systems without chemical additives present.