EPA Science Inventory

GEOGRAPHIC-SPECIFIC WATER QUALITY CRITERIA DEVELOPMENT WITH MONITORING DATA USING CONDITIONAL PROBABILITIES - A PROPOSED APPROACH

Citation:

Paul, J F. AND M E. McDonald. GEOGRAPHIC-SPECIFIC WATER QUALITY CRITERIA DEVELOPMENT WITH MONITORING DATA USING CONDITIONAL PROBABILITIES - A PROPOSED APPROACH. October JOURNAL OF AMERICAN WATER RESOURCES ASSOCIATION. American Water Resources Association, Middleburg, VA, 41(5):1211-1223, (2005).

Description:

A conditional probability approach using monitoring data to develop geographic-specific water quality criteria for protection of aquatic life is presented. Typical methods to develop criteria using existing monitoring data are limited by two issues: (1) how to extrapolate to an entire geographic area and (2) possible bias in site selection. A conditional probability approach using survey data overcomes these issues. With this approach aquatic biological thresholds of impairment are expressed as the likelihood of exceeding a given value of a pollution metric. In the example presented, benthic community index values (EPT taxa) were used to identify impaired stream communities, and three different analytical procedures were used for identifying thresholds. Although final development of water quality standards is a management decision, scientifically defensible approaches for establishing criteria based on significant deviations from expected community condition across a wide range of geographic conditions could be a useful first step.

Purpose/Objective:

To develop geographic-specific water quality criteria for the protection of aquatic life using a conditional probability approach

URLs/Downloads:

Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Start Date: 10/01/2005
Completion Date: 12/31/2005
Record Last Revised: 08/07/2006
Record Created: 12/08/2004
Record Released: 12/08/2004
OMB Category: Other
Record ID: 107378

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL HEALTH AND ENVIRONMENTAL EFFECTS RESEARCH LAB

ASSOCIATE DIRECTOR FOR ECOLOGY

IMMEDIATE OFFICE