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Imnaha River

Macroinvertebrate data: 09-27-2016



School: Enterprise High School

Date and time: Sept. 27, 2016, 10:52 a.m.

Water quality: Excellent

Number of people sorting/identifying: 5

Water type: riffle

Time spent sorting/identifying: 20 minutes

Weather:

Percent EPT: 72.92%

Note: EPT is the total number of caddisflies, mayflies, and stoneflies found divided by number of all bugs

Sensitivity to pollution
Sensitive
Count
Caddisfly
76
Mayfly
38
Riffle beetle
12
Stonefly
26
Water penny
2
Dobsonfly
0
Sensitive total
15
Somewhat Sensitive
Count
Clam/mussel
0
Crane fly
5
Crayfish
0
Damselfly
1
Dragonfly
0
Scud
0
Fishfly
0
Alderfly
0
Mite
0
Somewhat sensitive total
4
Tolerant
Count
Aquatic worm
1
Blackfly
0
Leech
28
Midge
0
Snail
3
Mosquito larva
0
Tolerant total
3