Riverfly and FBA logos

Riverfly Data

Riverfly Data

10422Total Samples Shown
99Trigger Level Breaches

Scores†
Average Score: 14

Count Distribution‡

Groups

Cased Caddis‡
Total: 370 | Average: 28

Caseless Caddis‡
Total: 121 | Average: 9

Mayfly (Ephemeridae)‡
Total: 108 | Average: 8

Blue-Winged Olive (Ephemerellidae)‡
Total: 147 | Average: 11

Flat-Bodied Stone Clinger (Heptageniidae)‡
Total: 150 | Average: 12

Olives (Baetidae)‡
Total: 665 | Average: 51

Stoneflies (Plecoptera)‡
Total: 75 | Average: 6

Freshwater Shrimp‡
Total: 2120 | Average: 163

†

Scores in this chart are calculated from the average monthly counts for each species group. The chart includes data derived from Urban and Extended Riverfly samples. Select a site using the map or menu bar to plot its trigger level alongside the scores.

‡

Values in this chart represent average monthly counts for each species group. The chart includes data derived from Urban and Extended Riverfly samples.