Riverine Inputs and Direct Discharges (RID)

The Comprehensive Study on Riverine Inputs and Direct Discharges (RID) aims to assess all inputs and discharges of selected contaminants to the OSPAR Maritime Area and its regions that are carried via rivers into tidal waters, or are discharged directly into the sea (for example through sewage pipelines or activities like aquaculture inputting substances directly). The RID Study currently focuses on mandatory monitoring and reporting of the concentrations and loads of the metals cadmium, copper, lead, mercury and zinc, the organic pollutant lindane, nitrogen and phosphorus species and suspended particulate matter. Monitoring of Polycyclic aromatic hydrocarbons (PAHs), mineral oil, polychlorinated biphenyls (PCBs) and other hazardous substances, especially organohalogens, are recommended for voluntary monitoring.

The detailed monitoring commitments of Contracting Parties are set out in the Riverine Inputs and Direct Discharges Monitoring Programme (RID) applicable from 1 January 2015. Monitoring and reporting is co-ordinated through adherence to jointly agreed guidance, including:

In 2017 a report ‘Case study on normalisation and trend analyses for OSPAR RID data’ was published. It presents statistical methods for normalisation, trend analysis and breakpoint analysis and illustrates these methods on case studies.

All data collected under the RID Programme are assessed on a regular basis at OSPAR level. The data are evaluated and published by OSPAR in yearly RID data reports. This follows agreed procedures set out in the Guidance on input trend assessment and the normalisation of loads and agreed statistical methods. The most recent scientific assessment of long-term trends in riverine inputs and direct discharges of hazardous pollutants to the OSPAR Maritime Area is the Riverine Inputs and Direct Discharges to Convention Waters OSPAR Contracting Parties' RID 2015 Data Report.