This report provides an overview of Senate standing committee sizes and ratios for the 94th Congress through the 111th Congress. Also included are data on permanent select committees with legislative jurisdiction. A table for each Congress shows the party division in the Senate, total number of seats on each committee, number of seats assigned to the majority and minority parties, and, where present, number of seats assigned to independents. The tables also provide the number of majority-minority caucus seat margins in the chamber and for each committees.

In the 106th Congress, no comprehensive activity on reauthorizing the Clean Water Act occurred, although a number of individual clean water bills were enacted. Other issues have been debated recently, such as reforming the law to provide regulatory relief for industry, states and cities, and individual landowners. The debate over many of these issues highlights differing views of the Act and its implementation by some who seek to strengthen existing requirements and others who believe that costs and benefits should be more carefully weighed before additional control programs are mandated.