The Arid West Water Quality Research Projects

Discharger Survey

Habitat Characterization Study

Extant Criteria Evaluation

Evaluation of the Reliability of the Biotic Ligand Model (BLM) Predictions for Copper Toxicity in Waters Characteristic of the Arid West

Hardness-Dependent Ammonia Toxicity and the Potential Use of the Water Effect Ratio

Evaluation of EPA Recalculation Procedure in the Arid West

Executive Summary
Appendix 1 - Species List
Appendix 2 - Toxicity Databases
Appendix 3 - Deletion Tables
User's Guide

Aquatic Communities of Ephemeral Stream Ecosystems

Executive Summary

AWWQRP Special Studies Report: Use of the EPA Recalculation Procedure with the Copper Biotic Ligand Model and Relative Role of Sodium and Alkalinity vs. Hardness in Controlling Acute Ammonia Toxicity

Arid West Water Quality Research Project User's Guide

Arid West Water Quality Research Project Final Report