The biggest troublemakers in single‑stream recycling are everyday items that look recyclable but actually contaminate loads or damage equipment. The most common offenders fall into a few clear categories, and they show up consistently across the U.S.
🚫 Items that commonly contaminate single‑stream recycling
- Food‑soiled paper — Grease and residue ruin paper fiber; roughly 1/3 of paper/cardboard contamination comes from food waste.
- Plastic bags & film — Make up over 10% of contaminants and wrap around sorting screens, causing shutdowns.
- Textiles & clothing — Frequently tossed in bins.
- Hazardous items — Batteries, electronics, sharps; a major fire risk.
- Small plastics — Items under ~2 inches fall through screens and become residual waste.
- Plastic straws, wrap, foam — Common “wishcycled” items that aren’t accepted in single‑stream systems.
- Glass in the wrong stream — Glass mixed with plastics accounts for over 10% of contamination in some Municipal Recycling Facilities (MRFs).
- Tanglers — Hoses, cords, lights, ropes — they jam machinery and halt operations.
🧭 Why these items cause so much trouble
Contaminants reduce bale quality, force load rejections, increase labor costs, and can shut down equipment for hours. Contamination rates average over 25% in U.S. single‑stream programs, costing municipalities over $1 billion annually.