|
To determine the use attainment status at each sampling location, the
following guidelines are used(From: Setting Ecologically-Based Water Quality
Goals: Ohio's Tiered Aquatic Life Use Designations Turn 20 Years Old Paper)
- Full Attainment- Stream or tributary
designated use is considered to be fully attained when all of the biological
indices meet the biocriteria value for the applicable use designation,
for the Eastern Corn Belt Plains ecoregion, and site(wading or boat) type.
Values that are within the nonsignificant departure range (4 IBI
or ICI units; 0.5 Miwb
units) are considered to meet the biocriteria.
- Partial Attainment- Stream or
tributary designated use is considered to be partially attained if one or
two biological indices indicate
attainment, but others do not; for the EWH
and WWH use designations, the
biological indices that fail to meet the applicable biocriteria must at
least be within the fair range of performance.
- Non-Attainment-
Stream or tributary designated use is not attained if all of the biological
indices fail to meet the biocriteria, or if either organism group
reflects poor or very poor performance, even if the other organism group
meets the biocriteria.
Biocriteria for
Eastern Corn Belt Plains(ECBP)
| Index- Site Type |
WWH |
EWH |
MWH |
| IBI- Headwaters/Wading |
40 |
50 |
24 |
| Mod. Iwb- Wading |
8.3 |
9.4 |
5.8 |
| ICI |
36 |
46 |
22 |
|
