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OC Brown Park - North Fork Deer Creek

Macroinvertebrate data: 09-20-2016



School: Tyee Outdoor Experience

Date and time: Sept. 20, 2016, 11 a.m.

Water quality: Fair

Number of people sorting/identifying: 5

Water type: riffle

Time spent sorting/identifying: 20 minutes

Weather:

Percent EPT: 26.67%

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

Sensitivity to pollution
Sensitive
Count
Caddisfly
3
Mayfly
0
Riffle beetle
0
Stonefly
5
Water penny
0
Dobsonfly
0
Sensitive total
6
Somewhat Sensitive
Count
Clam/mussel
0
Crane fly
0
Crayfish
1
Damselfly
0
Dragonfly
0
Scud
0
Fishfly
0
Alderfly
1
Mite
0
Somewhat sensitive total
4
Tolerant
Count
Aquatic worm
0
Blackfly
0
Leech
0
Midge
0
Snail
20
Mosquito larva
0
Tolerant total
1