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Metolius River Water Quality Project

Macroinvertebrate data: 10-25-2016



School: Obsidian Middle School

Date and time: Oct. 25, 2016, 1:29 p.m.

Water quality: Good

Number of people sorting/identifying: 14

Water type: riffle

Time spent sorting/identifying: 25 minutes

Weather:

Percent EPT: 76.67%

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

Sensitivity to pollution
Sensitive
Count
Caddisfly
13
Mayfly
6
Riffle beetle
0
Stonefly
27
Water penny
0
Dobsonfly
0
Sensitive total
9
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
11
Blackfly
0
Leech
0
Midge
1
Snail
2
Mosquito larva
0
Tolerant total
3