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West Olalla Creek

Macroinvertebrate data: 04-28-2016



School: Toledo High School

Date and time: April 28, 2016, 8:49 a.m.

Water quality: Good

Number of people sorting/identifying: 2

Water type: riffle

Time spent sorting/identifying: 20 minutes

Weather:

Percent EPT: 30.77%

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
5
Water penny
0
Dobsonfly
0
Sensitive total
6
Somewhat Sensitive
Count
Clam/mussel
0
Crane fly
0
Crayfish
0
Damselfly
0
Dragonfly
1
Scud
10
Fishfly
0
Alderfly
1
Mite
1
Somewhat sensitive total
8
Tolerant
Count
Aquatic worm
2
Blackfly
0
Leech
0
Midge
0
Snail
3
Mosquito larva
0
Tolerant total
2