Generally, Intermediate Lake water quality is very good. The Spring 2004 analysis demonstrated richly oxygenated water down to 23 feet and low to moderate levels of nutrients like phosphorus. The phosphorus value of 10 ppb may indicate an increase in septic problems. This lake continues to be very productive with reports of good catches of bass, walleye, and pan fish. The TCE spill at the former Texas Instrument Plant does not seem to have affected fishing. The last monitoring of that spill was done by the DEQ in 1998.