Dust storm put Pima County over EPA air-quality limit

High winds that sent huge dust clouds swirling last week caused Pima County to exceed federal air-quality standards for the first time in nearly four years, county officials said.

Clearing the air to improve our nation's health makes sense

The following editorial appeared Monday in the Washington Post:

Slash spending, reduce deficit by adding carbon tax

The following editorial appeared in Sunday's Washington Post:

Toxic ash from Arizona power plants called a potential groundwater hazard

The water table beneath three Arizona coal ash landfills lies 300 to 900 feet deep. The ground is tightly packed clay. The sites lie miles from populated areas.

Guest Column: Impress upon EPA the impact of proposed Navajo plant emission plans

For more than three years, the U.S. Environmental Protection Agency has been considering requiring new emission controls to reduce haze-forming nitrogen oxides (NOx) released as a byproduct of burning coal to create electricity at the Navajo Generating Station. The Central Arizona Project fo…

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Arizona

Arizona sues EPA over anti-haze mandate at 3 power plants

Arizona is challenging a federal decision that requires three coal-fired power plants to upgrade pollution controls.

US tightens air-quality rule for soot emissions

WASHINGTON - In its first major regulation since the election, the Obama administration on Friday imposed a new air quality standard that reduces by 20 percent the maximum amount of soot released into the air from smokestacks, diesel trucks and other sources of pollution.

EPA imposes new emission limits on Ariz. power plants

FLAGSTAFF - The U.S. Environmental Protection Agency has prescribed new pollution limits on three coal-fired Arizona power plants, aiming to protect the environment and air quality for wilderness areas and landmarks such as the Grand Canyon.

EPA rule puts Ariz. power plants on track to upgrade

FLAGSTAFF — The U.S. Environmental Protection Agency has outlined a final plan for upgrades at three Arizona coal-fired power plants, including the Apache Generating Station in Southern Arizona.

Hyundai, Kia inflated mileage on 13 recent models, EPA finds

DETROIT - Hyundai and Kia overstated the gas mileage on 900,000 vehicles sold in the past three years, a discovery that could bring sanctions from the U.S. government and millions of dollars in reimbursements to car owners.

Enviros: Put TEP plant under haze rule

Environmental groups want federal regulators to place a partly coal-fired power plant in Tucson under regional regulations designed to curb regional haze.

ADEQ head to EPA: Let state 'figure out' air quality issues

PHOENIX - The Environmental Protection Agency and Arizona have a common goal of following the Clean Air Act, but federal officials should recognize the "unique environment" here as they evaluate plans, a state official contends.

Lawsuit seeks to reinstate pygmy owl's protected status

This male pygmy owl was sighted in the Altar Valley area on Arizona state land near Three Points in August 2003.

Lawsuit seeks to reinstate pygmy owl's protected status

Conservation groups have sued to restore endangered status protection for small owls found in Southern Arizona.

EPA sets final rules for Four Corners power plant

FLAGSTAFF — The U.S. Environmental Protection Agency has issued its final rule aimed at cleaning up the largest single source of haze-causing pollutants in the country.

State, utilities fight EPA plan to reduce power-plant haze

Arizona Public Service said it may be forced to close down one of the units at its Cholla power plant near Holbrook if the EPA rules go into effect.

Arizona, utilities fight EPA plan to reduce power-plant haze

PHOENIX - State officials and utilities are trying to kill a plan by the U.S. Environmental Protection Agency to force owners of three coal-fired power plants to install expensive pollution-control equipment to improve visibility.

TEP seeks 15% rate hike, cites several rising costs

Tucson Electric Power Co. has filed to raise rates by more than 15 percent, saying it needs its first increase since 2008 to cover rising costs and recoup more than $1 billion in system investments.

EPA takes firsthand look at Rosemont

The Rosemont Mine, which would have an open pit and tailing piles, is proposed for a northern part of the Santa Rita Mountains, south of Tucson. EPA officials met with mine officials and opponents during a recent visit.