[ch. 1]. National water-quality assessment program
[ch. 2]. Summary of major issues and findings
[ch. 3]. Environmental setting and hydrologic conditions
[ch. 4]. Major issues and findings
(A) background water quality
(B) agriculture and water quality
(C) Red River water quality and nonagricultural sources of contamination
(D) effects of other nonpoint-source toxic compounds on water quality
(E) sediment in streams
(F) importance of variations in water quality
[ch. 5]. Water-quality conditions in a national context
[ch. 6]. Study design and data collection
[ch. 7]. Summary of compound detections and concentrations.