Low saguaro reproduction numbers at national park in Tucson
Drought cycle that dates to the mid-1990s thought to be responsible
When water is scarce, some researchers go underground to find out why
The amount of moisture held in the ground can play a big role in how much water makes it down to rivers and reservoirs.
Colorado River tribes aim to establish ‘one unified voice’ in policy talks
Those reliant on the river’s flows for agricultural, municipal and industrial use are gearing up for years of negotiation over future policies.
No movement on groundwater protection bills
This year's efforts to bring more regulation to Arizona's groundwater use have failed in the state legislature.
Extreme and exceptional drought stretching across southern Arizona
Tony Paniagua spoke to one rancher impacted by the dry conditions.
A Colorado River showdown is looming. Let the posturing begin
The states that draw water from it are about to undertake a new round of negotiations over the river’s future.
As more move to Arizona, what “smart growth” looks like
A discussion with Arizona Republic digital opinions editor Joanna Allhands.
Forecast for spring: Nasty drought worsens for much of US
West will be especially hard hit
Gila topminnow repopulate native waters
A tiny, endangered native fish is making a comeback in the Santa Cruz River.
Surveys aim to track trash making it into the Santa Cruz River
The Sonoran Institute is leading an effort to quantify the trash ending up in the river with the hope of eventually reducing it.
Western states chart diverging paths as water shortages loom
Drought and dwindling supply are creating stress on the western water-sharing system
Borderlands groups submit list of wall sections prioritized for removal
One of the most comprehensive outlines so far lists roughly 70 miles of wall segments across the Borderlands.
Arizona seeks to create surface water protections after Clean Water Act rollback
The legislation aims to fill the gap left by the rollback of federal protections, but not everyone is pleased with the current proposal.
In rapidly warming Colorado River Basin, the negotiating table is being set
A new round of talks could define how the river system adapts to a changing climate for the next generation.
Grand Canyon Protection Act passes House
The bill would permanently protect the region around the national park from new mining claims.
