So, the rural eastern Idaho town started $3 million of work to replace pipes that funnel drinking water from a nearby spring. Infrastructure report card graded Idaho’s water systems at a C+Idaho’s needs are driven by aging facilities, the state’s fast population growth, and environmental regulations, the UI study found. Most of Idaho’s water systems are serving small communities, the U I study found. The state’s drinking water and wastewater infrastructure systems scored higher, at a C+. Idaho’s public water systems provide safe drinking water, but they “face mounting challenges from aging infrastructure, limited funding, and climate pressures,” the report found.