From The Colorado Sun (Michael Booth):

Clean water advocates say a state commission is preparing to double down on a bad decision last year that failed to protect Clear Creek and the South Platte, and that a broader ruling may endanger more pristine streams.

year ago, the state’s water quality commissioners overruled not only their staff but other state agencies like Colorado Parks and Wildlife, along with a broad and very angry coalition of conservation groups.

Now, according to the conservation groups, the commission is about to do the same thing again. Only this time, the river advocates say, their proposals threaten every river in the state, weakening a bedrock 33-year-old rule the state uses to implement the federal Clean Water Act.

Colorado industries and city wastewater plants could legally dump more pollution into state rivers if water quality commissioners endorse this year’s plan while also sticking with last year’s changes, conservation groups say.

They argue the actions would mean the potential reversal of intensive efforts to clean city waters flowing past low-income areas already heavily impacted by economic and environmental problems.

They claim it opens the way for water dischargers like Metro Wastewater, Molson Coors and others to seek permits for discharges that would further degrade waters they themselves have already tainted.

“It’s just going to roll the clock backwards on pollution,” said Mely Whiting, legal counsel for the Colorado chapter of Trout Unlimited.

Last year, the Colorado Parks and Wildlife division argued to upgrade protection of the South Platte and Clear Creek by saying there is “no evidence that pollution is irreversible,” according to supporting statements filed at the state. The Water Quality Control Commission in June rejected stronger protections for those urbanized stretches of water, including Clear Creek, which flows out of Golden and past the Molson Coors plant on its way to the South Platte.

“I’ve always felt that a strong anti-degradation policy is very important in Colorado,” Water Quality Control Commission Paul Frohardt said during last year’s hearing about the South Platte and Clear Creek. “But I also believe that that policy makes sense and will have broad public support when it’s focused on truly high quality waters.”

Now the commission is taking on a scheduled five-year review of the anti-degradation rule applying statewide. Conservationists fear the commission is leaning toward loosening the strictest level of water quality review for all streams.

The “anti-degradation” rule currently in place says polluters seeking a new or renewed water quality permit must make a compelling argument that worsening the conditions of a stretch of river is an unavoidable part of an important economic development or civic improvement.

They must offer this proof even if the given stretch of water is already better than EPA water quality minimums. The state has until now effectively raised the floor of quality as a stream improves, and says those waters can’t be “degraded” below the new floor.

The Water Quality Control Commission has proposed new rules critics say would weaken that long-standing practice, by allowing dischargers to degrade the overall quality of a stream if even one regulated contaminant in the stream is already high.

Fierce opposition by conservationists

Big water dischargers who opposed the upgrade of urban river protections in written statements last year include Metro Wastewater, whose treated discharge makes up most of the water in the South Platte through Commerce City, and heavy industrial water users like Coors, according to state documents.

Metro Wastewater declined to comment. Molson Coors spokesman Marty Malone said in an emailed statement, “We have an established track record of leading water protection initiatives in our industry. We do not support degradation of water quality.”

Now that commissioners are pushing for a statewide weakening of the anti-degradation rule at their June 14 meeting, environmental advocates from Audubon to Trout Unlimited to Conservation Colorado are combining to mount fierce opposition.

Decades of intense and expensive cleanup efforts on urban streams like the South Platte, including by Metro Wastewater, have improved water quality and given the river a chance at more fish, wildlife and recreation, the coalition says. The state’s job is to keep pushing for even cleaner water, Whiting said, not to clear the way for backsliding…

At last year’s hearing, commission chairman Frohardt mentioned concerns of Metro Wastewater and others that they shouldn’t be responsible for further cleaning up river sections like the urban South Platte, because the waters are unlikely to ever support a major improvement in fish and wildlife beyond what they’ve recently achieved…

State officials said Thursday they are writing alternate versions of the change that they hope will satisfy concerns of the conservation groups. The commissioners will hear the various proposals and arguments about them in their June 14 meeting…

State officials have struggled, though, to explain why the regulations need to be changed. Clarifying the rules, Oeth said, will help establish how Colorado rivers got to their current water condition, and “to provide more clear direction to the commission about how to apply that past when they’re considering the specific example of segments in the future.”

[…]

The conservation alliance said the draft alternatives are also unacceptable unless they come with much stronger language guaranteeing the state will include economic justice concerns, and the voices of impacted neighborhoods, when considering controversial water discharge permits.

Clear Creek, Standley Lake watersheds including the Standley Lake Canal Zone via the Clear Creek Watershed Foundation.

The South Platte River Basin is shaded in yellow. Source: Tom Cech, One World One Water Center, Metropolitan State University of Denver.