For more information on the EII program, please contact:

Andrew Clamann

Mateo Scoggins

Generally, there are six categories of data collected:

E.Coli Bacteria

  1. Contact Recreation - E. Coli Bacteria
    • Human pathogen indicator
    • 4 times per year/reach
  2. Non-Contact Recreation - Visual assessment form
    • Aesthetic appeal to average person
    • Garbage, odor, algae, clarity, etc
  3. Water Quality - Chemical measurements
    • Nutrients (Nitrate-N, Ammonia-N, and Orthophosphorus
    • Total Suspended Solids and Turbidity
    • Dissolved Oxygen, Conductivity, pH and Temperature
  4. Sediment Quality - Sediment Chemistry
    • Sampled at mouths of streams once per year
    • Aggregates watershed inputs
    • Metals, PAHs, pesticides and herbicides
  5. Habitat Quality - Forms based on visual assessment and direct measurements
    • EPA national protocol, qualitative
    • Non-scoring Pfankuch channel stability form
  6. Aquatic Life
    • Benthic Macroinvertebrate Community (invertebrates)
      • 9 metrics assessing: Diversity, Pollution Tolerance and Community Structure
      • Evaluates stream health in terms of the preceding months to years
    • Diatom Community (single cellular algae on rocks)
      • Pollution Tolerance Index and Percent Similarity to Reference Conditions
      • Evaluates stream health in terms of the preceding months to years

A more complete description of the parameters and methods for the most recent sample years are provided in the introduction to the Watershed Summary Report More detailed information on the specific methods for field and lab analysis in addition to metrics for determining scores is located in report COA-ERM-1999-01 Environmental Integrity Index Methodology, May 31, 2002 edition.