Since 1977, 277 lakes have been monitored in conjunction with this program. Eighty-two lakes have 10 or more years of data, and 34 of these have 15 years or more. The Spring Phosphorus database contains over 14,779 records. Long-term nutrient enrichment trends from this program are used to calculate the water quality score for lakes found online as part of the Vermont Lake Score Card. Given the number of lakes in Vermont and the short window available for sampling after ice out in the Spring, each lake is sampled every 5-10 years.