with    
Macroinvertebrate Tally
Name of Collector
Location
Date of Collection

Group 1 - Sensitive to pollutants
Record the number of individuals in the boxes

 Stonefly Larva  stonefly

Water Snipe Fly Larva  water snipe fly larva

Dobsonfly Larva  dobsonfly larva

Alderfly Larva  alderfly larva

Total number of Group 1 animals found:

Group 2 - Semi-Sensitive to pollutants
Record the number of individuals in the boxes

 Caddisfly  caddisflycaddisflycaddisfly larva— larva
Cranefly Larva  cranefly larva
Dragonfly Larva dragonfly larva 

Damselfly Larva   damselfly larva

Fingernail Clam or Freshwater Mussel  mussel
 Crayfish  crayfish

Water Penny Larva  waterpenny

Riffle Beetle  riffle beetleriffle larva— larva
 Mayfly Larva  

Total number of Group 2 animals found:

Group 3 - Semi-Tolerant to pollutants
Record the number of individuals in the boxes

 Blackfly Larva  blackfly larva

Non-red Midge Larva   midge larva


Amphiopod or Scud scud

Snails: Gilled or Orb   snail   snail2

Total number of Group 3 animals found:

Group 4 - Tolerant of Pollutants
Record the number of individuals in the boxes


 Pouch Snail (left-side opening)  pouch snail

Bloodworm Midge Larva  (red)  red midge


Leech  leech

Aquatic Sowbug  sowbug
 Worms: Tubifex or Threadworm tubifexthreadworm


Total number of Group 4 animals found:

Record the totals from each category box. Then complete the calculations.
Group 1
Sensitive  
x 4 =
Group 2
Semi-Sensitive  
 x 3 =
Group 3
Semi-Tolerant  
 x 2 =
Group 4
Tolerant  
 x 1 =
Totals
F: 
E: 

Divide F by E  
 ÷  =   This is the index score.

How healthy is the stream?
       
3.6 and up    
 Excellent
2.6 - 3.5    
 Good
2.1 - 2.5    
 Fair
1.0 - 2.0    
 Poor