Neosho Basin TMDLs

• TMDLs for the Neosho Basin
• Implementation Priority
• September 30, 2002 Approval Letter
• December 23, 2002 Approval Letter
• John Redmond Approval Letter
• January 6, 2005 Approval Letter
• February 25, 2005 Approval Letter

KDHE has completed the first two rounds of TMDLs within the Neosho Basin based on the 1998 and 2004 - 303(d) lists, and is currently developing additional TMDLs within the basin based on the 2008 - 303(d) list. There are 60 approved TMDLs within the Neosho Basin that describe the strategies and goals to reduce pollution to achieve water quality standards. Of these, there are 14 that are high priority for implementation. KDHE develops TMDLs on a basin-by-basin approach and will revisit existing TMDLs and develop new TMDLs within the Neosho Basin in 2008 and 2013.

The 2008 - Section 303(d) list submitted to and approved by EPA identifies watersheds associated with 26 stream chemistry sampling stations and two biological monitoring station as water quality impaired. There are 17 lakes and wetlands in the Neosho River Basin listed as water quality impaired. Among the streams, dissolved oxygen depletion, zinc, total phosphorus and copper cause the greatest numbers of impairments. Among the lakes, eutrophic conditions indicative of excessive algae production were the predominant cause of impairment.

Other pollutants limiting the use of the Neosho River Basin streams include atrazine, biological stressors, pH, lead, sulfate, total suspended solids, and excessive temperatures. Perchlorate, siltation, lead, and copper caused additional lake and wetland impairments. Each parameter causing impairment requires a TMDL.