But they said water from the river was safe, with water quality meeting government-set standards.
Any beach with a blue flag has to display its water quality results, on easy-to-read signs.
The water quality in more than 200 other reserves has also been deemed risky.
The Research Council study was not tasked with assessing water quality surrounding hydraulic fracturing.
Coffee production uses large quantities of water and its processing can seriously affect water quality.
The agency said water quality had almost returned to normal and fish were no longer being affected.
Countries bordering the Danube have reinforced water quality controls and are monitoring the concentration of heavy metals.
"Generally, Thames water quality has been improving - the fish are returning, " explained Bristol's Dr Nicholas Howden.
We recognised the importance of bathing water quality to the local communities around Thanet and beach users.
Poland is affected by periodic flood events and pays great attention to the issue of water quality.
How can EPA use its role in improving water quality to provide more public access to waterfronts?
It is intended to convey messages for education and awareness-raising on protecting water quality throughout the world.
The wettest summer on record has been blamed for a Weston-super-Mare beach failing a bathing water quality test.
BBC: Weston Uphill Slipway beach fails water quality standard
It concluded it would lead to an increase in flooding, and would endanger water quality and public health.
United Utilities is building a huge sewage tunnel beneath the city centre to improve drainage and water quality.
The degradation of water quality in rivers, streams, lakes, and groundwater systems has a direct impact on ecosystems and human health.
UNESCO: World Water Day 22 March 2010: Clean Water for a Healthy World
Bathing water quality at Portstewart Strand and Portrush East Strand has been either excellent or good during that time.
Torbay Council said test results showed bathing water quality had not been affected.
BBC: Torbay sewage pumping 'not affecting beach water quality'
With a new iPhone app, IBM hopes to change that and improve water quality and information about water supplies.
FORBES: IBM Launches iPhone App For Crowdsourcing Water Quality
By contrast, in poorer nations that do not have universal access to electricity, air and water quality suffers.
R. 999, is designed to establish uniform criteria for testing, monitoring and notifying the public of beach water quality.
In addition, it said a 2004 review by the Marine Corps found the service followed existing water quality regulations.
Improving management of national forests to put more emphasis on recreation, wildlife and water quality and less on logging.
The agency said it would continue to monitor the volume and water quality.
It was found that bathing water quality at Portrush West Strand has been consistently excellent since monitoring began in 1988.
Such robots could skim across lakes and other bodies of water to monitor water quality or act as tiny spies.
ENGADGET: Chinese microbot walks on water, skims the surface of insect-inspired design
Many communities have therefore expressed concern about their water quality, in addition to the production process that is carbon intensive.
The Natural Resources Defense Council argues that the new airport will destroy wetlands and hurt water quality in the Bay.
However, Beijing's environment bureau says water quality has "not been affected so far" by the illegal dump, Xinhua adds.
The vice president called on Congress to abandon property rights legislation hurting state and local efforts to protect water quality.
CNN: AllPolitics - Gore Calls On Congress To Bolster Clean Water Act
应用推荐