Regulatory water quality monitoring networks : statistical and economic considerations /

Mode of access: Internet.

User's manual for EXPLORE-I : a river basin water quality model (hydraulic module only) /

Mode of access: Internet.

Ground water quality [microform] : hearings before the Subcommittee on Department Operations, Research, and Foreign Agriculture of the Committee on Agriculture, House of Representatives, One Hundredth Congress, first session on H.R. 791, July 28, and September 16, 1987.

"Serial no. 100-49."

Review of ground water quality concerns [microform] : hearings before the Subcommittee on Department Operations, Research, and Foreign Agriculture of the Committee on Agriculture, House of Representatives, One Hundredth Congress, first and second sessions, October 12, 1987, Humboldt, IA; October 27 and December 9, 1987; March 29 and May 24, 1988.

"Serial no. 100-95."

Air quality modeling : what it is and how it is used /

Mode of access: Internet.

Reservoirs and waterways : identification and assessment of environmental quality problems and research program development /

"July 1978."

Parameters of water quality,

Cover title.

Non-point source water quality monitoring, Inyo National Forest, 1975 : a progress report /

Includes bibliographies.

A state-of-the-art survey of the economics of water quality : a report submitted to the U. S. Army Engineer Institute for Water Resources ... /

"Review draft."

Reference materials for collaborative tests of air quality methods /

Mode of access: Internet.

A biological and water quality survey of Sugar Creek and tributaries, Crawford County, Illinois, August-September, 1992 /

"IEPA/WPC/93-063."--Cover.

An Issues/options paper for comprehensive water quality standards for groundwater /

"December 1988."--Cover.

Assessment of nonpoint source impacts on Illinois water quality.

"IEPA/WPC/88-020."

Best management practices report : a compilation of individual reports submitted by Robert Walker ... [et al.]

Includes bibliographies.

Assessment of non-traditional controls on ambient air quality /

"Project no. 10.090."