Discusses and illustrates the organisms in sludge, and what can be learned by microscopic analysis of biological treatment systems for wastewater.

Wastewater organisms database.

A forum for all water environment topics.

Information about the operation and science of aerated lagoons for wastewater treatment.

Conducts research and technology development on wastewater treatment methods. Site is in English and French.

Description of the biology, ecology and botany of duckweed (Lemnaceae) and its use in treating wastewater.

Information about ChemDen, a new technology to convert nitrate in wastewater, agriculture runoff, and other waters to nitrogen gas.

How the county (Washington state, USA) regulates industrial discharges into its wastewater system, including discharge limits, approvals, enforcement, and fees.

About Key West's wastewater treatment project (treatment and deep well injection of treated effluent) and about wastewater and its treatment, in general.

Water education and training, integrated water resources management, IMRM, IWRM, reports, training material, case studies, information, specialists, global water partnership, capacity building in IWRM, database of global water management, training institutes.