SUMMARY TERRA-1 TERRA-2 TERRA-3 TERRA-4 TERRA-5 SOCIO-1 SOCIO-2 SOCIO-3 SOCIO-4 SOCIO-5 SOCIO-6 SOCIO-7 TIMBR-1 TIMBR-2 TIMBR-3 HLTH-1 HLTH-2 HLTH-3 AQUA-1 AQUA-2 AQUA-3 AQUA-4 AQUA-5 HISTORY FIRE UPDATE-1 PDF (1.3 MB)

AQUA-1: Water Quality in the South

1 Key Findings

2 Introduction

3 Methods

4 Data Sources

1.1 Spatial Data

1.2 Land-Use Data

1.3 Water-Quality Data

5 Results

5.1 History of Water-Quality Conditions in the South

5.2 Current Status of Water Quality in the South

5.3 Land Use Impacts on Water Quality

5.4 The Likely Future of Water Quality in the South

6 Discussion and Conclusions

7 Needs for Additional Research

8 Acknowledgments

9 Literature Cited

Tables and Figures

Table 1--Common causes of pollution summarized from National Water Quality Inventory Reports

Table 2--Common sources of pollution summarized from National Water Quality Inventory Reports

Table 3--Interrelationship between common sources and causes of pollution

Table 4--Leading sources of impairment of rivers and streams from 1988 to 1998

Table 5--Overall watershed characterization using Index of Watershed Indicators data

Table 6--Watershed characterization of ecological provinces using Index of Watershed Indicators data

Table 7--National Water Quality Assessment Program study units

Table 8--Agricultural land-use practices and associated pollutants

Table 9--Overall watershed characterization using Unified Watershed Assessment criteria

Table 10--Watershed characterization of ecological provinces using Unified Watershed Assessment criteria

Figure 1--Annual average contribution of point and nonpoint sources of pollution to impaired river miles

Figure 2--Relative percent contribution of point and nonpoint sources of pollution to impaired river miles

Figure 3--Leading sources of impairment of rivers and streams

Figure 4--Overall characterization of water quality in Southern watersheds

Figure 5--Characterization of water quality and restoration priorities of Southern watersheds