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Metolius River Water Quality Project

Macroinvertebrate data: 10-24-2016



School: Obsidian Middle School

Date and time: Oct. 24, 2016, 9 a.m.

Water quality: Poor

Number of people sorting/identifying: 10

Water type: riffle

Time spent sorting/identifying: 20 minutes

Weather:

Percent EPT: 83.33%

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
3
Riffle beetle
0
Stonefly
2
Water penny
0
Dobsonfly
0
Sensitive total
6
Somewhat Sensitive
Count
Clam/mussel
0
Crane fly
0
Crayfish
0
Damselfly
0
Dragonfly
0
Scud
0
Fishfly
0
Alderfly
0
Mite
0
Somewhat sensitive total
0
Tolerant
Count
Aquatic worm
0
Blackfly
0
Leech
0
Midge
0
Snail
1
Mosquito larva
0
Tolerant total
1