Field Descriptions
COMID-"Common Identifier" from NHDPlus Version 2. Uniquely identifies a flowline (stream segment)
Reachcode-identifies reach, there may be one or more COMIDs per reach.
TOXCONC- toxicity-weighted concentration of all chemical concentrations resulting in the flowline from the DMR/TRI releases. Concentration is in mg/L.
Lat1/Long1- coordinates of the 25th point of the 100 that constitute a flowline in NHDPlus. Note that points may not be evenly spaced.
Lat2/Long2- coordinates of the 50th point of the 100 that constitute a flowline in NHDPlus. Note that points may not be evenly spaced.
Lat3/Long3- coordinates of the 75thpoint of the 100 that constitute a flowline in NHDPlus. Note that points may not be evenly spaced.