Big Arizona waterways like the Salt River fall under the federal Clean Water Act, as do some of their tributaries. But exactly which tributaries are covered by the Act has led to many legal fights since it first passed in 1972. The latest battle is over a rollback of rules from the Obama administration that defined a so-called “Water of the United States.”

What are Arizona’s lakes, rivers and streams worth to the state’s economy? A new report released Tuesday tries to answer that question.

Three generations of Navajo and Hopi have worked for the the West’s largest coal-fired power plant. Now that the Navajo Generating Station is closing, the tribe is looking for alternatives — both in jobs, and in energy sources.

Drought has been a near-constant in much of Arizona for decades. One of the ways the city of Phoenix has tried — and, many would say, succeeded — in staying ahead of that condition is through water banking and storage.

On Wednesday, outside of the White House, Gov. Doug Ducey shifted his position on President Trump’s threat the close our Southern border. He told reporters that, while trade is important, “border security comes first.” This is a new take on a possible government shutdown for Ducey.

The Drought Contingency Plan that Arizona and the six other Colorado River Basin states have been working on to maintain water supplies needs federal approval, and a vital step toward that conclusion was introduced in the Senate this week.

Western members of Congress have introduced legislation authorizing the secretary of interior to enact the Drought Contingency Plan. The DCP is a deal among the seven states of the Colorado River basin.

There’s a battle in Congress over disaster relief funding. The Republican-backed bill was blocked by Democrats in the Senate on Monday.The sticking point: Puerto Rico.

Late Friday, APS disclosed their previous spending to influence Corporation Commission elections — something Arizona Commissioner Bob Burns had been fighting to obtain for years.