Filter the clickable stream network by quality class, and narrow to wild-reproducing and/or native-species water.
Each gauge icon is scored every 15 minutes against its 30-year USGS median for that calendar day, then colored Good / Fair / Poor. When a river has several gauges, its overall verdict is the worst of them.
© OpenStreetMap contributors · CARTO · USGS The National Map · Esri (imagery) · Terrain: Mapzen / AWS Open Data. Stream & trout data: NHDPlus + state agencies.
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