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Grande Ronde River

Macroinvertebrate data: 09-28-2015



School: Enterprise High School

Date and time: Sept. 28, 2015, 10:21 a.m.

Water quality: Good

Number of people sorting/identifying: 3

Water type: pool

Time spent sorting/identifying: 10 minutes

Weather:

Percent EPT: 20.83%

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

Sensitivity to pollution
Sensitive
Count
Caddisfly
0
Mayfly
4
Riffle beetle
2
Stonefly
1
Water penny
3
Dobsonfly
0
Sensitive total
12
Somewhat Sensitive
Count
Clam/mussel
0
Crane fly
0
Crayfish
0
Damselfly
0
Dragonfly
2
Scud
0
Fishfly
0
Alderfly
0
Mite
0
Somewhat sensitive total
2
Tolerant
Count
Aquatic worm
10
Blackfly
0
Leech
0
Midge
0
Snail
2
Mosquito larva
0
Tolerant total
2