What rules or laws are out there for irrigation to ensure proper irrigation installation and prevent water loss or run-off? Colorado Springs City Council, which is the board of directors for the city utilities, is creating a landscape ordinace with help from some local landscapers. I know of a few rules so far that are going into effect: Mandatory rain sensors on new installs. Not sure about existing systems. This is seems to always be the first thing they ask for when these problems come up. Bad thing is, we didn't get any damn rain for them to work last year. Heads with check valves are going to be mandatory. Not sure if that is for all heads through out the systems, or just on major slopes. I believe they are also forbidding any new systems with auto drains. I've heard mention of master valves but not sure if they are going that route. I don't like them on residential. Then I can't work on the system if they are not home if the master valve is inside. I do believe in the licensing but that is a state issue not a city one I believe. How are your rules/laws enforced? Is every system checked out by someone?