Do your states recognize a property owners right of subsurface water ownership and can these water rights be sold separately from the realty in your market?
Colorado Water Law is based on the doctrine of prior appropriation -- water is considered a finite resource, and whoever was first in time to appropriate it's use, is first in right for continued use.
The Colorado Constitution gives priority to Municipal use, then Commercial, and Agriculture last. In the 1970's, several cities began condemnation proceedings for the water rights controlled by agricultural irrigation ditch companies. Since they were going to lose anyway, most of the ditch companies negotiated a settlement, receiving 110% of what they gave up in treated effluent.
In a low runoff year, the senior users get their full share, while the junior right holders get nothing.
Last year, the State Water Board ordered the majority of the agricultural wells in the Platte River Basin to be shut down, because they were depleting the aquifer. Many of the these wells dated back to the 1940's, but because they were junior rights and an over appropriation of the resource, they were shut down. Long time irrigated farms were left high and dry.
State Water Law allows for a domestic well permit for any residential use where a water tap is not available, but does not allow the use of this water for lawns and landscaping.
Arizona has long maintained the fiction that aquifers are resources that can be tapped, without regard to the effect on surface resources. As water tables have fallen, they have slowly come around -- but without the CAP water from the Colorado, they would be in a world of hurt.
As for New Mexico, I don't have a clue as to their water laws -- but I doubt the State would look kindly on a landowner appropriating and selling sub surface rights without regard to the rights of other users.
An illegal diversion of water was the central theme of the
Milagro Beanfield War -- and that case was resolved in favor of the farmers, under the doctrine of prior appropriation.
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