Nation's water challenges are many, but so are the solutions
![Nation's water challenges are many, but so are the solutions](http://bloximages.chicago2.vip.townnews.com/bismarcktribune.com/content/tncms/assets/v3/editorial/a/5c/a5cb8b5d-fff3-53cf-adb4-9a2ffa2e95a4/5609f6cba3571.image.jpg?resize=300%2C183)
Many of the nation's water-supply systems need expensive improvements. And in the West and elsewhere, utilities are focused on finding enough water to meet demand. Although the problems are co…