Environmental Monitoring Handbook

Barry T. Hart
Most countries now have water resources management policies aimed at achieving sustainable use of their water resources by protecting and enhancing their quality while maintaining economic and social development. Achieving this objective requires that the needs and wants of the community for each water resource are defined and that these resources are protected from degradation. These community needs generally are called the environmental values (or beneficial uses) of the water body and can include water for drinking, swimming, fishing, recreation, agricultural food production, and/or ecosystem protection.
Water quality guidelines (or criteria) are the scientific and technical information used to provide an objective means for judging the quality needed to maintain a particular environmental value. Knowledge-based management decisions made on the basis of this scientific knowledge are far more preferable than those resulting from pressure by narrowly focused lobby groups.
A number of water quality guideline compilations are now available (e.g., USEPA, 1986a; CCREM, 1991; ANZECC, 1992). With few...