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Williams Creek @ Hwy 238 (above Applegate River confluence)

Macroinvertebrate data: 02-23-2015



School: Central High School

Date and time: Feb. 23, 2015, 11:27 a.m.

Water quality: Good

Number of people sorting/identifying: 10

Water type: riffle

Time spent sorting/identifying: 60 minutes

Weather:

Percent EPT: 51.02%

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

Sensitivity to pollution
Sensitive
Count
Caddisfly
4
Mayfly
16
Riffle beetle
0
Stonefly
5
Water penny
0
Dobsonfly
0
Sensitive total
9
Somewhat Sensitive
Count
Clam/mussel
0
Crane fly
0
Crayfish
16
Damselfly
0
Dragonfly
0
Scud
2
Fishfly
0
Alderfly
0
Mite
0
Somewhat sensitive total
4
Tolerant
Count
Aquatic worm
1
Blackfly
0
Leech
0
Midge
4
Snail
1
Mosquito larva
0
Tolerant total
3