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</div> </td><td valign="top" width="24"></td><td valign="top"> <div align="left"> <table border="0" cellpadding="2" cellspacing="4" width="400" align="left"> <tr> <td width="336"></td> </tr> <tr> <td width="336"> <p><font face="Arial" COLOR="#000000" size="6"> <b> Coming Soon: Nutrient Standards</b> </font></p> <p><font face="Times New Roman" size="3" COLOR="#000000"> The Clean Water Action Plan of 1998 set a priority on developing nutrient standards, which could cause an explosion of new entries on US EPA’s 303(d) list of impaired waters. The tentative target date for the final nutrient standards is December 31, 2003. </font></p> <p><font face="Times New Roman" size="3" COLOR="#000000"> Standards are being developed for nitrogen, phosphorus, chlorophyll-a and turbidity. Though turbidity is not a nutrient, it can be an excellent indicator of the presence of high levels of nutrients. </font></p> <p><font face="Times New Roman" size="3"><font COLOR="#000000"> For instance, nutrients often enter water bodies with sediment runoff, so turbidity can be an</font> <font face="Times" SIZE="3" COLOR="#000000"> excellent indicator of nutrient loading. Turbidity can also reflect a high incidence of dead algae and aquatic plants, which often thrive in nutrient-enriched conditions. Additionally, when chlorophyll-a in algae dies, it degrades to pheophyton, which can also contribute to turbidity.</font></font></p> <p><font face="Times New Roman" size="3"><font COLOR="#000000"> High nutrient loads are associated with algal blooms and related problems with pH, dissolved oxygen and eutrophic conditions. Nutrients have also been implicated in the large hypoxic zone</font> <font face="Times" SIZE="3" COLOR="#000000">in the Gulf of Mexico, hypoxia observed in several East Coast states, Pfiesteria-induced fish kills, and human health problems in the coastal waters of several East Coast and Gulf states. To date, the national response to the nutrient problem has been limited primarily because of concerns over the scale of the problem and because of the tremendous variability of nutrient conditions, both natural and cultural, throughout the nation.</font></font></p> <p><font face="Times New Roman" size="3" COLOR="#000000"> EPA has divided the country into 14 nutrient regions. Each region will establish nutrient criteria for 1) streams and rivers, 2) lakes and reservoirs, 3) wetlands, and 4) coasts and estuaries. </font></p> <p><font face="Times New Roman" size="3" COLOR="#000000"> For more information on nutrient standards, refer to National Strategy For The Development of Regional Nutrient Criteria on US EPA’s web site: http://www.epa.gov/ostwater/Rules/nutsi.html </font></p> <p><font face="Times New Roman" size="3" color="#000000"> © 1999, YSI Incorporated </font></p> </td> </tr> </table> </div> </td></tr></table></body> </html>