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Nice to see Polis push back at EPA | Denver Gazette

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Nice to see Polis push back at EPA | Denver Gazette


As if Colorado consumers weren’t already reeling from years of inflation, a federal regulation is about to raise what it costs to fill up your tank. By an estimated 60 cents per gallon.

Starting May 15, the U.S. Environmental Protection Agency will require northern Front Range gas stations to sell much pricier, reformulated gasoline all summer long. The premise for the higher-grade fuel — blended to reduce ozone-forming pollutants — is that our state has fallen short of meeting more stringent ozone restrictions imposed by the feds on nine Front Range counties, from Douglas County north to the Wyoming border.

As reported this week by the Colorado Chamber of Commerce news service Sum & Substance, Gov. Jared Polis has launched an eleventh-hour appeal to the federal agency to back off of its deadline for requiring the more expensive, reformulated fuel, or RFG. In an April 4 letter to the EPA, Sum & Substance reports, Polis tells agency chief Michael Regan he commissioned an analysis that has revealed “onerous and counterproductive impacts.”

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“RFG requirements threaten Colorado’s fuel supply, will raise prices and may result in shortages at the pump,” the governor wrote. “Moreover, this antiquated mandate creates an additional unintended consequence: We are seeing significant activity and requests to expand fossil fuel facilities such as terminals in the most polluted areas of Colorado in the ozone non-attainment area to supply RFG.”

The letter, which seeks a waiver from the mandate, continues, “These proposed projects from your elective enforcement of this requirement will increase emissions of volatile organic compounds (VOCs) and other ozone precursor emissions in the community, and given the lack of supply in Colorado will increase intra- and interstate fuel delivery truck traffic resulting in more, not less, harmful air pollution in our most vulnerable communities…In short, forcing this requirement on Colorado will create more air pollution.”

It wouldn’t be the first time a federal regulation backfired — resulting in unintended consequences that are in fact the opposite of the mandate’s intent. But kudos to Polis for fighting the good fight on this one, wherever it leads. All the more so considering Polis’ own turnabout on the issue.

Several years ago, Polis was welcoming the pending mandate. He wrote the U.S. Environmental Protection Agency in 2019, shortly after taking office, urging the agency to proceed with more stringent ozone standards.

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Since then, he has seen the light — undoubtedly anticipating the likely public uproar at the EPA rule’s projected impact on the price at the pump. Colorado business leaders also reached out to the governor when the issue first came to light and pleaded with him to seek a waiver.

As we noted at that time, the EPA has been tilting at Colorado’s ozone levels for years. The Colorado Department of Health and Environment maintains that the state’s air quality actually has improved greatly over the past several decades. But, as a department official told The Denver Gazette in 2022, the state has had to “comply with increasingly stringent federal standards.”

As we also noted then, critics of the EPA policy contend a lot of the region’s ozone issues stem from uncontrollable, natural, out-of-state and even international sources.

“Most of our ozone, 60%, is naturally occurring, blows in from other states and countries, or is caused by wildfires,” Rich Coolidge of the Colorado Oil & Gas Association told The Denver Gazette.

The governor of course has been the driver of a green-energy agenda that has raised prices ever higher for Colorado energy consumers. It’s about time he tries to get them some relief, for a change.

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Denver, CO

The hippo had to go, but the Denver Zoo slashed its water budget

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The hippo had to go, but the Denver Zoo slashed its water budget


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  • Zoos in the American West are implementing water conservation measures due to drought conditions.
  • The Denver Zoo has significantly reduced its water usage through upgrades like filtration systems and replacing old pipes.
  • The Phoenix Zoo focuses on housing animals suited for its hot climate and has upgraded its irrigation systems to save water.

DENVER — Zoos are of necessity big gulpers of water, a fact that has some zookeepers in the drying American West working to rapidly upgrade efficiency and reduce unnecessary irrigation or leaks.

Denver Zoo, formally known as the Denver Zoo Conservation Alliance, has rapidly reduced its demands on threatened and declining water sources, including the Colorado River.

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Among the upgrades is a sea lion water filtration system that allows most of the water to be cleaned and reused each time the pool is drained. That’s saving more than 8 million gallons a year, zoo sustainability director Blair Neelands said. “You can get in there, scrub it with a toothbrush and refill it with the same water,” she said.

Similar upgrades to an African penguin showcase reduced its water use by 95% by largely eliminating what’s sent down the drain. (Like a backyard swimming pool, though, these tanks sometimes still need to be drained and refreshed with new water to reduce mineral buildup.)

“The biggest thing for us is swapping from dump-and-fill pools to life-support systems,” Neeland said.

Another biggie is replacement of a 50-year-old water main with funding of about $3 million from the city. There’s no way of knowing how much that pipe had leaked over the years, but Neeland suspected it was more than a million gallons a year. The savings should become apparent as the zoo tracks its water use over the next few years.

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Creating hippo-sized water savings

When The Arizona Republic visited in 2025, the zoo was on the cusp of eclipsing a goal to reduce its water use by half of what it had been in 2018. The zoo had used 80 million gallons in 2024, or about 219,000 a day, a 45% reduction in just a handful of years. Much of the savings had come in the form of smarter irrigation practices and use of drought-tolerant native plants where possible. The landscaping also pivoted to recycled “purple pipe” water from the city, which owns the zoo’s land, restricting potable water to areas where animals really need it.

“When people hear ‘recycled water,’ they get worried about cleanliness and hygiene,” zoo spokesman Jake Kubié said. “But it’s safe for the animals, and it’s not their drinking water.”

Getting past the water conservation goal would mean draining the pool where Mahali the hippo spent most hours lurking with just his eyes, ears and snout visible to visitors. Because he spent so much time in the pool, the water needed daily changes. It amounted to 21 million gallons a year, not to mention water heater bills that drove the cost to $200,000 a year, according to zoo officials. They estimated that Mahali used as much water as 350,000 four-person households.

“This facility is outdated,” Kubié said. “Some day this will become a huge saver of water.”

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That day came before year’s end, and it indeed brought a tremendous savings. The zoo shipped Mahali to a new home (and a potential mate) at a wildlife preserve in Texas and drained the pool one last time. Ending the daily change-outs shaved more than a quarter of the zoo’s entire water usage from the previous year. It put the zoo significantly beyond its goal.

Denver Zoo’s water savings are part of a broader waste- and pollution-prevention effort aimed at being a good neighbor in uncertain times, Neeland said.

“Water savings and drought is top of mind for anyone who lives in the Western United States,” she said.

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In Phoenix, a different mix of animals

That’s true of the Phoenix Zoo, as well, where zookeepers must maintain landscaping and animal exhibits in a city that baked under 100-degree-plus high temperatures for a third of the days last year. The zoo creates a “respite in the desert,” spokeswoman Linda Hardwick said, but has no hippos, penguins, grizzly bears or many of the other species that would require big water investments for outdoor swimming or cooling.

“We really specialize in animals that will thrive in the temperatures here,” Hardwick said.

The Phoenix Zoo uses most of its water on landscaping. After a consultant’s 2023 irrigation assessment, the staff centralized irrigation scheduling under a single trained technician and employed technologies including weather-based controllers and smart meters. Salt River Project awarded $70,000 in grant funds for the upgrades and several thousand more for training.

The zoo uses about 189,000 gallons a day, she said. That represents a 17% reduction from 2023, or 20% when adjusted for the year’s particular weather and evapotranspiration demand.

Brandon Loomis covers environmental and climate issues for The Arizona Republic and azcentral.com. Reach him at brandon.loomis@arizonarepublic.com.

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Environmental coverage on azcentral.com and in The Arizona Republic is supported by a grant from the Nina Mason Pulliam Charitable Trust. 

Follow The Republic environmental reporting team at environment.azcentral.com and @azcenvironment on Facebook and Instagram.





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New video shows trespasser on Denver airport runway before deadly collision

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New video shows trespasser on Denver airport runway before deadly collision




New video shows trespasser on Denver airport runway before deadly collision – CBS News

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A surveillance video shows the alleged trespasser on the runway at the Denver International Airport before a Frontier jet struck and killed the person.

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Person dies after being hit by plane at Denver airport

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Person dies after being hit by plane at Denver airport


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A Frontier Airlines plane has hit and killed a person at Denver’s international airport, prompting the evacuation of passengers. Authorities say the man jumped a perimeter fence and ran in front of the plane as it was taking off to Los Angeles.



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