Established over 100 years, the association of analytical communities focuses on method validation and laboratory quality assurance. Provides illustrated publication list with prices, available from Gaithersburg, MD.

Network of organizations aiming at a system for the international traceability of chemical measurements, providing newsletters back to 1996, forthcoming events, liaison groups with links to national sites in Europe .

CITAC supports laboratories evaluating measurement uncertainty with this site and with the recently published guide. Includes contacts for participants worldwide.

Since 1968 the Water Research Institute (IRSA) has been involved in finding solutions to problems of water resources management and protection, and in developing processes and technologies for potabilisation and wastewater treatment.

The Institute headquarter is located in Rome,Italy.