Four rules that prevent common recycling contamination
What contamination means
Contamination is any material or condition the receiving system cannot safely or economically process. It can be leftover food or liquid, a plastic bag wrapped around machinery, the wrong type of glass, a battery that creates a fire risk, or a genuinely recyclable material sent to a facility that does not accept it.
| Contaminant | Why it matters | Safer response |
|---|---|---|
| Food and liquid | Can soil paper and other collected material. | Empty, scrape or briefly rinse; keep fiber dry. |
| Plastic bags and film | Can wrap around material-recovery equipment. | Keep out of household recycling; use an accepting film program. |
| Mixed-material products | Layers or attached parts may not separate in the receiving process. | Separate only when local instructions request it; otherwise verify the whole item. |
| Compostable plastic | Does not belong with ordinary plastic recycling and may require industrial conditions. | Use only a compatible composting service that accepts the certification. |
| Batteries and electronics | Can cause fires and contain materials requiring specialist recovery. | Use separate take-back, battery, electronics, or hazardous-waste collection. |
How to use the disposal guide
- Identify. Choose the exact item, not only its broad material.
- Inspect. Note residue, moisture, contents, damage and attached materials.
- Verify. Compare the exact item with current instructions from the intended service.
- Prepare. Follow the result, add it to your guide, then sort each item separately.
Safety limit: This is a general screening guide, not emergency or hazardous-material advice. Do not open, drain, crush, burn, or dismantle batteries, electronics, sharps, chemicals, pressurized cylinders, fluorescent lamps, or unknown materials. For hot, smoking, leaking, swollen, or otherwise unstable items, move away if necessary and contact local emergency services, the manufacturer, or the appropriate hazardous-waste authority.
Sources and scope
The decision rules are conservative summaries of U.S. EPA consumer guidance and are designed to defer to local requirements. They are useful internationally as screening questions, but they do not encode every jurisdiction's laws, colors, labels, deposit systems, or collection contracts.
