A few entrepreneurs in Colorado are looking to oil and gas wells for an unusual product, water.
They're working to create a new industry around so-called produced water.
Oil wells typically produce more water as they age, making recovery of oil more difficult.
In some cases, the produced water can be injected into the wells to force more oil to the surface.
If the water quality is good enough, a well operator may opt to send the water down the nearest stream.
In Wellington near Fort Collins, a farmer wants to use produced water to irrigate fields and sell surface flows to cities.
Meanwhile, a couple of retired businessmen living in Huerfano County are looking into forming a small company to provide produced water for cisterns.