The purpose was to determine the effect of Pawtuckaway State Park in New Hampshire on the quality of the immediate environment. During the summer of 1971, and intensive study was made of lake water quality as affected by park usage, and the attitudes of private water-oriented landowners toward the park. Physical measurements of water quality were made, and twelve water quality indices were determined by a sampling process. Measurements indicated that the levels of eleven water quality indices were within acceptable bounds for recreational use. Coliform count was studied as influenced by climate, attendance weekend use and time. Second, a survey of shoreline residents was conducted to determine their attitudes about the impact of the park. The findings are noted.