A methodology can be found here.
Linkages:
FDES (Framework for the development of Environment Statistics) topic 3.1 on waste (see the specific note on waste in the FDES). However, this indicator is not directly related to the FDES. (Contact Reena Shah from UNSD on the FDES.)
SEEA (System of Economic Environmental Accounts) framework for waste accounts; however, this indicator is not directly related to the SEEA. (Contact Alessandra Alferi from UNSD on the SEEA.)
BRS, Minamata and the Montreal Protocol: This indicator is directly compiled from reporting to the conventions. (Contact: BRS: Tatiana Terekhova; Minamata: Lara Ognibene; Montreal Protocol: Sophia Mylona)
Strategic Approach to International Chemicals Management (SAICM): The SAICM is in the process of developing the post 2020 framework which will provide a basis for better management of chemicals and hazardous waste. (Contact: Jacqueline Alvarez; Mihaela Paun)
The indicator refers to the number of parties (=countries that have ratified, accepted, approved or accessed), to the following Multilateral Environmental Agreements (MEAs): 1. The Basel Convention on the Control of Transboundary Movements of Hazardous Wastes and their Disposal (Basel Convention);
2. The Rotterdam Convention on the prior informed consent procedure for certain hazardous chemicals and pesticides in international trade (Rotterdam Convention);
3. The Stockholm Convention on Persistent Organic Pollutants (Stockholm Convention);
4. The Montreal Protocol on Substances that Deplete the Ozone Layer (Montreal Protocol);
5. Minamata Convention on Mercury (Minamata Convention),
Which have submitted the information to the Secretariat of each MEA, as required by each of the agreements. Each of the reporting requirements are assigned points to score the indicator. This data is directly compiled from the Conventions, but it does not capture quality or comprehensiveness of the reports. The methodology is here. UNEP's Economy Division has been promoting the use of a more comprehensive data collection on report quality through the SAICM.
Additionally, addition research linking chemicals and hazardous waste is needed.