Firehole River near Old Faithful, WY (YFOF)
Firehole River near Madison Junction (YFIR), Yellowstone National Park 
Sample Collection: Samples were collected near the USGS stream gage 06036905 (Latitude 44°37'12.66",   Longitude 110°51'48.61"   NAD83). At the time of collection, all waters samples were filtered through a syringe filter (0.45-micrometer). Two …