"NO wonder they are called conveniences. Flush toilets swirl human waste down the drain quickly and neatly. But the convenience comes with a rising price for all that follows the flush — a cost that is often paid by municipal water and sewage treatment systems.

Now some groups are rethinking the venerable technology of the flush toilet, particularly for regions that lack such systems or for places where waste water treatment plants, many of them aging, are overburdened by the demands of fast-growing populations.

On Horn Island, off the Gulf Coast of Mississippi, there are still mats of oil from last year's Deepwater Horizon drilling disaster. BP will be returning to clean them up.

"Millions of Americans have been ingesting them for years—perchlorate, hexavalent chromium, volatile organic compounds—not because they’re safe, but because they are among 6,000 toxins the EPA has not gotten around to regulating in municipal drinking water systems.

But after a change in administrations and a scathing review by the General Accounting Office, the EPA has begun to develop regulations to remove these chemicals from tap and bottled water—and industry has begun efforts to delay or prevent their implementation."

"Sewage routinely contaminates the Hudson River throughout the year, rendering the waterway unsuitable for swimming and other recreational activities for at least one and a half days a week, a report based on four years of water testing shows."

"ST. LOUIS, Mo. -- In a legal settlement with the United States and an environmental foundation, The Metropolitan St. Louis Sewer District has agreed to make extensive improvements to its sewer systems and treatment plants, at an estimated cost of $4.7 billion over 23 years.

The improvements are intended to eliminate illegal overflows of untreated raw sewage and to reduce pollution levels in urban rivers and streams.

"Israel said on Monday it was building a 1.5 billion shekel ($423 million) desalination plant, which upon completion in 2013, will join four other plants in providing the country with three-quarters of its drinking water."

"Chicago's first round of testing for a toxic metal called hexavalent chromium found that levels in local drinking water are more than 11 times higher than a health standard California adopted last month.

"A federal appeals court [Tuesday] struck down a challenge filed by the Florida Department of Agriculture and several chemical companies and upheld a clean water settlement between the U.S. Environmental Protection Agency and conservation groups."

"The Environmental Protection Agency should order companies such as Schlumberger Ltd. and Halliburton Co. to disclose the hydraulic fracturing chemicals used in U.S. oil and gas drilling, advocacy groups said."