Do Irrigation Systems in Moscow Require Backflow Protection and Annual Testing?

Irrigation systems connected to the City of Moscow's Public Drinking Water System require appropriate backflow protection. Moscow City Code Title 7, Chapter 9 requires that all irrigation systems, existing or new, must be equipped with an approved backflow prevention assembly and must be inspected and tested annually by a State of Idaho licensed backflow assembly tester.

A backflow assembly installed on your system is necessary to help prevent contaminants from entering the public water supply through what is known as backflow condition. Backflow is defined as, "the flow, other than the intended direction of flow of any foreign liquids, gases, or substances into the distribution system of a public water supply."

The protection of Moscow's water supply is of critical importance to both the City of Moscow and its citizens. To learn more about the City's Cross Connection Control Program please visit us here:

If you have more specific questions, please email Ty Thompson or call the Environmental Services Department at 208-883-7230.

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1. My water bill is high compared to last month and we have not done anything different. Where did the water go?
2. What do I do if I have a water emergency after hours?
3. My water appears dirty or has a yellow color to it. What should I do?
4. How do I know my water is safe?
5. My water pressure seems low or I have low flow. What could be the problem?
6. When can I water my yard?
7. How can I purchase bulk water?
8. Where is my meter located?
9. Where is my water shut-off?
10. Where does my water come from?
11. Do Irrigation Systems in Moscow Require Backflow Protection and Annual Testing?
12. Is there lead or copper in my water?
13. Is there Fluoride in my water?
14. Why does the City flush water mains? Isn't that a waste of water?
15. How do I view the City's Annual Water Quality Report?