Take a look at table showing the lake characteristics for Lake Sammamish.

Download the spreadsheets below containing profile data from Lake Sammamish. The manual profiles contain the same basic parameters that the RUSS units collect only the data were collected by a real person using a field meter. The water chemistry spreadsheets contain nutrient, chlorophyll and other data you'll need to further understand the lake. The Secchi and Trophic State Index (TSI) files sum up data that have been collected for a number of years. Secchi and TSI are probably the best way to look for any long-term trends.

Lake Sammamish Manual Profile
Lake Sammamish Water Chemistry
Lake Sammamish Water Quality Graphs