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West Olalla Creek

Macroinvertebrate data: 05-17-2017



School: Toledo High School

Date and time: May 17, 2017, 9 a.m.

Water quality: Excellent

Number of people sorting/identifying: 1

Water type: riffle

Time spent sorting/identifying: 30 minutes

Weather:

Percent EPT: 48.39%

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

Sensitivity to pollution
Sensitive
Count
Caddisfly
1
Mayfly
8
Riffle beetle
0
Stonefly
6
Water penny
0
Dobsonfly
1
Sensitive total
12
Somewhat Sensitive
Count
Clam/mussel
0
Crane fly
0
Crayfish
0
Damselfly
0
Dragonfly
0
Scud
5
Fishfly
2
Alderfly
0
Mite
1
Somewhat sensitive total
6
Tolerant
Count
Aquatic worm
4
Blackfly
0
Leech
0
Midge
2
Snail
0
Mosquito larva
1
Tolerant total
3