Provide EPA’s perspective on nutrient pollution and encourage an open dialogue to help address this problem which is rapidly becoming one of the most challenging environmental problems that we face.
Although nutrients, nitrogen and phosphorus in particular, are essential for aquatic life, too many nutrients can create significant problems for our nation’s lakes, streams, and coastal waters. Nutrient pollution can degrade habitat for fish and wildlife, render water bodies unsafe for swimming and other forms of contact recreation, create a public health concern for drinking water supplies, decrease property values, and negatively impact local economies. According to national statistics, more than 45% of streams have medium to high levels of nutrients, approximately four million lake acres have been identified as threatened or impaired, and approximately 78% of assessed coastal areas exhibit signs of eutrophication.
Nutrients can be transported great distances and impact areas far downstream. One of the more prominent examples in the United States is the Gulf of Mexico “dead zone,” which can be larger than the state of Connecticut in some years. The term “dead zone” refers to waters that have been so heavily impacted by nutrient pollution that oxygen levels are depleted to the point where most aquatic life cannot survive. Nutrients are transported to the Gulf of Mexico via tributaries of the Mississippi River from as far away as Montana in the west and Pennsylvania in the eastern portion of this large watershed.
Nutrient pollution is not restricted to the Mississippi River Basin or any one region of the country. Nutrient pollution is widespread, impacting waters across the nation. As we learn more about the impacts of nutrient pollution, especially the potential for some species of algae to produce toxins that can be harmful to both people and animals, states are becoming more aggressive in reducing sources and even posting health advisories when necessary.
So, what has EPA been doing to address nutrient pollution?
And although progress has been made over the past decade, much more is needed. Realizing a need for greater action, In March 2011, EPA issued a memorandum titled “Working in Partnership with States to Address Phosphorus and Nitrogen Pollution through Use of a Framework for State Nutrient Reductions.” This memo emphasized that nutrient pollution continues to have the potential to become one of the costliest and most challenging environmental problems that we face and reaffirmed the agencies commitment to partner with states and stakeholders to make greater progress in reducing nutrient loading to our nation’s waters. If you have not already done so, please join us in protecting and restoring our nation’s waters. For more information visit EPA’s nutrient pollution website at http://www.epa.gov/nutrientpollution/.
Alfred Basile, Biologist, US Environmental Protection Agency Region 8, email@example.com
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