A Source of water supply for drinking, culinary or food processing purposes, and any other usages. B Primary contact recreation and any other use except as a source of water supply for drinking, culinary or food processing purposes. They reflect drainage from only approximately one-third of the stream's watershed area. N Number of samples in calculation. All observations below the laboratory limit of detection.
Calculations use one-half the laboratory limit of detection when observations are below that limit.
Calculations use a replacement value of one-half the laboratory limit of detection when observations are below that limit.