Updated from 10:26 a.m. Tuesday with stock price action and light editing throughout.

NEW YORK (TheStreet) -- Coal companies and analysts found little to complain about as they responded to the Obama administration's rules, proposed Monday, that are aimed at reducing carbon emissions. While some were arguing that the targets will raise electricity prices, most in the industry seemed to accept that greater efficiency was not only necessary for coal burning plants but already under way.

The Environmental Protection Agency proposal, which seeks to reduce carbon emissions from power plants 30% by 2030, includes a great deal of flexibility and several key concessions to the industry. Coal, which produces more than a third of the electricity used in the U.S. and the lion's share of carbon dioxide emissions from utilities, has the most to lose under the EPA proposal.

Stern Agee analyst Michael Dudas emphasized in a report Tuesday that the rules could face significant political and judicial challenges before it takes effect next year.

This aggressive non-legislative rule making could face failure if the Judiciary limits EPA's ability to reach beyond the fence of the existing plants to reduce overall emissions. As debate rages on, we believe coal and natural gas inventory dynamics, competitive pricing trends, and signs of more concrete efforts to curtail global metallurgical oversupply will drive share price action during the next several months.

But Dudas added, as TheStreet noted Monday, investors feel some relief over the Environmental Protection Agency announcement:

There were concerns EPA might use a more recent base year for measurement. Since EPA is using 2005 as base year, we believe the proposal is less onerous as the agency is giving industry credit for 15% carbon emission reductions already achieved from 2005 to 2012.

While there will certainly be legal challenges to these rules, the likelihood of success is far from certain. The courts have so far upheld several key regulatory efforts by the EPA regarding greenhouse gases. As The Wall Street Journal pointed out in an article last week, "Under long-standing legal principles, courts give deference to administrative agencies like the EPA as long as they don't regulate in an arbitrary and capricious manner."

The new rules face political challenges, notably from Senate Majority Leader Mitch McConnell, a Republican from the coal state of Kentucky. McConnell is running for reelection and has made his opposition to President Obama's policies and the new rules in particular a centerpiece of his campaign.

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Peabody Energy (BTU - Get Report), the largest coal energy producer in the world, joined its voice to that political fight. The company did not respond to an emailed request for comment Monday after the proposed rules were announced, but late in the afternoon the company issued a statement on its Web site arguing that the imposed targets would raise electricity prices. However, the company also suggested that coal-energy companies needed to modernize toward greater efficiency, a position that seems in line with the EPA's expectations.

Positioning cheap energy supplied by coal as a "right" and its own mission as "the will of the people," the company's statement also took a potshot at the global warming science driving the push for carbon dioxide emissions reductions.

Today, American policy should be guided not by a modeled crisis, but by the real crisis of more than one of every three U.S. households that qualify for energy assistance. Energy inequality in the U.S. is an enormous challenge ... and access to low-cost energy is a basic need. Yet proposed regulations will make energy more scarce and more expensive without any material improvement in emissions.

The real endangerment finding is the harm the Administration's policies will have on Americans -- particularly the poor, the working class, the elderly, minorities, small businesses, manufacturing, consumers of health care and nutritious foods, and a fledgling economy that should be growing jobs at far faster rates. Already, multiple reports put the cost to each American household in the thousands of dollars over time.

Meanwhile, Xcel Energy's (XEL - Get Report) remarks Monday at an RBC Capital Markets energy conference impressed RBC analyst Shelby Tucker, who noted in a report Tuesday:

Xcel is well positioned to meet the new EPA proposal on carbon reductions. Despite having not seen the final version of the EPA proposed CO2 rule, management expects that Xcel has already reduced carbon emissions to date by approximately 20% based on 2005 levels. Furthermore, Xcel expects to reduce emissions by 30% by 2020 from 2005 levels, which would exceed EPA proposals for 25% reduction by 2020 and meet the 30% reduction proposal by 2030 well ahead of schedule.

The same analyst found that CMS Energy (CMS - Get Report) was equally at ease with the proposed rules. "Management noted that the company's generation fleet would be well ahead of the 25% by 2020 and 30% by 2030 proposal outlined today by the Environmental Protection Agency (EPA)," Tucker wrote.

In April, CMS announced it was pressing ahead with plans to retire the older coal-fired power stations in its fleet to bring them into compliance with expected regulatory requirements. The company currently has about 8,000 MW of capacity, mostly coal-fired.

Shares of Peabody, Xcel and CMS were basically flat over the last two trading sessions. The Dow Jones U.S. Coal Index was down 1% at midday Tuesday.

The EPA, for its part, said in a press release that the proposed reductions in carbon emissions would "[s]hrink electricity bills roughly 8 percent by increasing energy efficiency and reducing demand in the electricity system."

In her speech Monday, EPA Administrator Gina McCarthy noted that the proposed rules continue a positive trend already begun within the energy industry.

And even without national standards, the energy sector sees the writing on the wall. Businesses like Spectra Energy are investing billions in clean energy. And utilities like Exelon (EXC - Get Report) and Entergy (ETR - Get Report) are weaving climate considerations into business plans. All this means more jobs, not less. We'll need thousands of American workers, in construction, transmission, and more, to make cleaner power a reality.

The bottom line is: we have never -- nor will we ever -- have to choose between a healthy economy and a healthy environment.

>> Read More:

EPA's Greenhouse Gas Powers Aired in Supreme Court

Coal Shares React Positively to EPA Emissions Rules

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-- Written by Carlton Wilkinson in New York