The New Jersey Division of Water Resources' Bureau of Water Quality Planning and Management initiated its intensive lake survey program during the spring of 1977. These surveys are an outgrowth of the on-going lake inventory and classification program. Fifteen (15) lakes were surveyed, primarily based on priorities established by 208 Areawide Planning Programs. Those selected included an urban lake, suburban and rural lakes, and reservoirs. The trophic status of these lakes ranges from oligotrophic to highly eutrophic.These surveys were designed to determine lake dynamics and trophic conditions, utilizing field observations, nutrient concentrations and biological analyses and indices. Point and non-point sources of nutrients are differentiated and quantified wherever possible. Recommendations are made regarding the control of excessive nutrient loading and methods for lake rehabilitation.The intensive lake surveys were performed during a one (1) year period. Samples were taken monthly at lake inlets and outlets, from all point sources in the watersheds, and upstream from all discharges. In-lake surface and bottom samples (where appropriate) were taken during the spring, summer and autumn. Analyses were conducted for physical, chemical, bacteriological and other biological parameters.Surveys on these diversified lake ecosystems will aid ''208"planning groups in developing their areawide water resources management plans, provide basic input to facilities planning, and will assist local communities in their quest for funding under the Federal Clean Lakes Program. A second group of thirty (30) lake surveys is scheduled to begin during December, 1978. Surveys such as these play an integral part in achieving the goals of the Clean Water Act of 1977 and provide a basic tool to the citizens of this state for obtaining high quality water for recreation and water supply uses.