Stream Redesignation Evaluation Report
Water Quality Standards Review

Oswayo Creek, Potter County
RBP Metric Comparison

Table 7

METRIC

STATION

1OC 2BH 3HH 6OC 11OC R2 R3
1. TAXA RICHNESS 9 13 9 21 17 22 21
Cand/Ref (%) 41 59 41 100 81 *** ***
Biol. Cond. Score 0 0 0 6 6 6 6
2. MOD. EPT INDEX 0 10 5 11 4 14 13
Cand/Ref (%) 0 71 36 85 31 *** ***
Biol. Cond. Score 0 4 0 6 0 6 6
3. MOD. HBI 5.9 2.8 4.2 3.4 4.8 3.1 2.2
Cand-Ref 2.8 -0.3 1.1 1.2 2.6 *** ***
Biol. Cond. Score 0 6 4 2 0 6 6
4. % DOMINANT TAXA 81 26 59 27 41 29 16
Cand-Ref 52 -3 30 11 25 *** ***
Biol. Cond. Score 0 6 0 4 0 6 6
5. % MOD. MAYFLYS 0 4 1 29 1 19 45
Ref-Cand 19 15 18 16 44 *** ***
Biol. Cond. Score 4 4 4 4 0 6 6
TOTAL BIOLOGICAL
CONDITION SCORE
4 20 8 22 6 30 30
% COMPARABILITY
TO REFERENCE
13 67 27 73 20 *** ***
Note: Stations 1OC, 2BH, AND 3HH compared to R2;
Stations 6OC and 11OC compared to R3

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