Total annual water resources research effort in Minnesota in terms of number of ongoing projects increased from 65 in 1963 to 149 in 1971 and was 140 in 1972. The estimated annual man-years of effort rose from 41.1 in 1963 to 200.1 in 1972. Total annual expenditures increased from $620,000 in 1963 to $3,900,000 in 1972. In 1972, Federal agencies conducted the greatest amount (50 percent of total) of water resources research in Minnesota with the University of Minnesota, consultants, private organizations, state and private colleges and state agencies following in that order. The percentages of the total research conducted by individual Federal agencies were as follows: Environmental Protection Agency (National Water Quality Laboratory) - 42, U.S. Department of Agriculture (Agricultural Research Service) - 4, U.S. Department of Agriculture (Forest Service) - 2, and U.S. Department of the Interior (Geological Survey) - 2. Organizations funding the greatest amounts of water resources research in 1972 were: Environmental Protection Agency, U.S. Department of the Interior, U.S. Department of Agriculture, U.S. Department of the Navy, National Science Foundation, Atomic Energy Commission, Northern States Power Company, Department of Defense and state agencies.