Thursday, September 13, 2007

The Key Problem -- Wastewater Treatment Plants

Back in late July Jordan Green had an important article in YES Weekly on the regional governments ongoing attempt to resist the cleanup of Jordan Lake, the main water supply for the Triangle. Wastewater pollution from the Haw River as it flows into Jordan Lake is a central concern of the N.C. Division of Water Quality. If the Guilford and Rockingham County Commissioners allow the rezoning for Patriot's Landing both counties will be again ignoring the major concerns of the N.C. Division of Water Quality and may be directly forcing the creation of new, stricter, more expensive water quality rules and regulations for the Haw River/Upper Cape Fear River Basin watershed.

Green said: "The state's data tells a somewhat different story about the sources of Jordan Lake's pollution from the Haw River. The Division of Water Quality found that 35 percent of nitrogen loads in the Haw River comes from point sources - mainly wastewater treatment plants..."

The County Commissioners in both Guilford and Rockingham will be sending the wrong signal if they allow the placement of a new community sewer treatment plant on the banks of the Haw River that will add to the nitrogen rich flow heading towards Jordan Lake. There is also no doubt that both the golf course chemicals and the extensive use of yard chemicals from the 775 planned houses will also add to the nitrogen and phosphorous pollution damaging Jordan Lake.

10 comments:

Anonymous said...

What makes nitrogen and phosphorus such dangerous pollutants? How do they damage the ecosystem?
Isn't Jordan Lake a source of water for Raleigh?

illmcs7 said...

iagree

Dr. Ken Gracz said...

Nitrogen and phosphorus are major components of plant fertilizers that can run-off into streams. They promote the overgrowth of algae. These algal overgrowths evently die off. As the masses of dead algae accumulate on the stream bottom they undergo decomposition by bacteria. This decomposition requires oxygen, which is then removed from the water. This is the B.O.D.- the biologic oxygen demand. The higher the B.O.D., the lower the water's oxygen content. This impacts on the natural flora and fauna of the stream, killing them off. Unchecked, an ecologic "dead zone" appears in the stream or lake. The scientific name for this process is "eutropification". The EPA considers the run-off of nitrogen and phosphorus-containing fertilizers a major adverse ecologic impact on watersheds.

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