Colorado is proposing to ramp up requirements that agricultural water users, ranging from big companies to small mom-and-pop farms, measure the amount of water they divert from streams, rivers and waterways.

The state engineer says a statewide rule is necessary to prepare Colorado for a water-scarce future. Some water users, however, accuse the state of taking a heavy-handed and overly expensive approach that will force landowners to install devices in areas that don’t need them.