A beach item is a clue, not a verdict

A litter item has no passport

The Joint Research Centre's source-identification report makes a point that should stay on every cleanup clipboard: a site can receive litter from nearby or distant sources, moved by currents or wind. A food wrapper may have more than one possible source and pathway.

The report says that tracing the origin of individual items is difficult and always carries uncertainty. A photo of litter beside sun loungers is not proof that beach users left every item. Keep the observed clue and the interpretation separate.

What one Bulgarian study found

Chuturkova and Simeonova analysed 2019 surveys from 10 Bulgarian beaches. They grouped litter into public, fishing, shipping, sanitary and sewage, fly-tipped, medical, and non-sourced categories.

Public litter made up 48.3% of the study total and non-sourced litter made up 38.5%. Within the public category, 82.9% was attributed to recreation and 17.1% to smoking-related items. Public litter was the largest category at every site, ranging from 65.9% to 86.7%.

This was a study of one year and 10 sites. It is evidence about that sample, not a current national total or a verdict on every beach on the Bulgarian coast.

Give every source label a reason

The labels are useful only when the field notes show how you reached them. A short source note is more honest than a confident guess.

• Observed item: record the JRC category and count.
• Site context: note nearby access routes, bins, ports, fishing activity, river mouths, storm-water outlets, or campsites.
• Interpretation: use a possible source only when the site context supports it.
• Uncertainty: use non-sourced or unknown when the evidence is weak.
• Confidence: write high, medium, or low and explain the reason in one sentence.

Use one shared list

The EU Joint List of Litter Categories was prepared by the Marine Strategy Framework Directive Technical Group on Marine Litter and adopted by the MSFD Coordination Group in 2019. It provides a common list of litter types so monitoring records can be compared across European seas.

Garbamons does not need to turn a volunteer cleanup into a formal survey. It can keep the useful part: one category list, one place, one date, and a clear note about what was observed rather than inferred.

Let repeated clues point to prevention

The European Commission says that the 10 single-use plastic products most commonly found on European beaches, together with fishing gear, represent 70% of EU marine litter. Its Single-Use Plastics page covers products such as beverage cups and containers, cigarette butts, bags, packets, wrappers, wet wipes, and sanitary items.

When one category keeps returning at the same pin, share the record with the event organiser or municipality and ask which prevention measure fits. The answer may involve access, bin placement, a reusable service, better collection, or a producer responsibility scheme.

On Garbamons, pin the place, enter the source clue and confidence, and link the related cleanup or event. Map the clue, not a culprit.

Sources

• Joint Research Centre: Identifying sources of marine litter

  Official EU technical report on sources, pathways, matrix scoring, and uncertainty in source attribution. (LINK_ONLY)

• Chuturkova and Simeonova, 2021, Sources of marine litter along the Bulgarian Black Sea coast

  Peer-reviewed study of 10 Bulgarian beaches surveyed in 2019. Reports the source categories and percentages used in the article. (LINK_ONLY)

• Joint List of Litter Categories Manual

  Official EU category list adopted for comparable marine macrolitter monitoring. (LINK_ONLY)

• Single-use plastics

  European Commission overview of the 10 product groups addressed by the Single-Use Plastics Directive and related producer obligations. (LINK_ONLY)

• Commission Decision (EU) 2017/848

  Official framework requiring source and pathway information to be collected where feasible for marine litter monitoring. (LINK_ONLY)