New federal Colorado River operating rules are requiring Arizona, Nevada and California to reduce water use, but San Diego County water officials say the region's past investments should help buffer local customers from immediate supply disruptions, according to Times of San Diego reporting published Sunday.

The Department of the Interior's framework calls for lower basin states to reduce Colorado River use by a combined 1.25 million acre-feet per year, including 440,000 acre-feet from California, according to the report. San Diego County Water Authority officials told Times of San Diego the region has diversified supplies, expanded storage and secured senior water rights that place it in a stronger position than some other Southwest communities.

That matters in Santee because Padre Dam Municipal Water District says it imports 100% of its potable water from the San Diego County Water Authority. Padre Dam says its drinking water is blended from the Colorado River system, the California State Water Project, desalinated ocean water and local San Diego County watershed supplies.

The broader takeaway for Santee residents is not that water bills or conservation rules disappear. It is that the region's long-running push to diversify water sources, including recycled water and the East County Advanced Water Purification Project, is becoming more relevant as Colorado River supplies tighten across the Southwest.