This article was originally published in February, 2019 and has been updated per 2026 recycling standards.
Plastic waste management in commercial and industrial settings continues to be a point of friction—especially when it comes to interpreting recycling symbols. Most packaging includes the familiar triangle with a number inside, but that doesn’t mean it’s recyclable in your program. Misreading these symbols leads to load contamination, increased hauling costs, and missed diversion targets.
This updated 2026 guide to plastic recycling symbols explained is for Massachusetts-based facility managers, operations leads, and sustainability teams who handle plastic every day. It outlines which plastic codes are actually recyclable, how each type shows up in workplace settings, and how to prevent mis-sorting at the source.
The Problem: Recycling Symbols Create False Confidence
The numbering system on plastics is based on resin types, not recyclability. That’s the key distinction. Many facility teams assume the presence of a triangle means an item is recyclable. It doesn’t. And that assumption can cause entire loads to be rejected or downgraded.
For institutional and industrial operations, understanding the real-world recyclability of plastic materials is essential to managing compliance and cost.
Plastic Recycling Numbers: The 7 Codes and What They Mean
Plastic recycling numbers refer to the resin identification codes—#1 through #7—used to classify types of plastic. Here’s how each is used and what it means for your facility’s waste stream:
#1 – PET (Polyethylene Terephthalate)
Used in: Beverage bottles, clear food containers
Recyclable? Yes, widely accepted
Facility relevance: Common in vending and cafeteria areas. Rinse before disposal to prevent residue issues.
#2 – HDPE (High-Density Polyethylene)
Used in: Chemical drums, janitorial product containers, rigid packaging
Recyclable? Yes, widely accepted
Facility relevance: Frequently found in manufacturing, facility maintenance, and distribution operations.
#3 – PVC (Polyvinyl Chloride)
Used in: Pipes, shrink wrap, vinyl signage
Recyclable? No, not accepted in most recycling systems
Facility relevance: Best handled through product reuse or disposal. Avoid placing in commingled streams.
#4 – LDPE (Low-Density Polyethylene)
Used in: Stretch film, pallet wrap, plastic bags
Recyclable? Yes, through commercial programs
Facility relevance: Common in shipping and warehouse environments. Requires clean separation. Learn how we handle LDPE.
#5 – PP (Polypropylene)
Used in: Tubs, bottle caps, automotive parts
Recyclable? Sometimes
Facility relevance: Acceptance varies. Worth collecting separately if volume is consistent. Confirm with your recycling provider.
#6 – PS (Polystyrene)
Used in: Foam packaging, disposable trays
Recyclable? Not in most local programs
Facility relevance: Often treated as trash. Substitute materials may be more cost-effective long-term.
#7 – Other (Mixed Plastics / Bioplastics)
Used in: Multi-layer packaging, PLA containers
Recyclable? No
Facility relevance: These materials don’t belong in recycling bins. Keep separate to avoid contamination.
What Plastic Numbers Are Recyclable in Massachusetts?
Which plastics are typically accepted in commercial recycling programs?
Codes #1 (PET) and #2 (HDPE) are consistently accepted. LDPE (#4) is recyclable through designated programs. Code #5 (PP) is accepted in some facilities.
Can pallet wrap and shrink film be recycled?
Yes—if it’s LDPE (#4), clean, and separated. We offer specialized services for this material.
Does the recycling triangle mean a plastic item is recyclable?
No. The triangle indicates resin type only. It does not guarantee recyclability. Always check with your recycling provider.
What’s the difference between plastic symbol meanings and actual recycling options?
Plastic symbol meanings explain what material the item is made from—not whether your facility can recycle it. For businesses in Massachusetts, available recycling options depend on your hauler’s capabilities and contamination limits.
Facility-Level Solutions to Reduce Contamination
Operational waste issues often start with well-intentioned staff placing the wrong plastics in recycling bins. If they’ve been told to “look for the triangle,” that’s likely the problem.
Here’s what works in commercial settings:
- Post clear guidance listing which plastic numbers are acceptable. Keep it at eye level near disposal areas.
- Standardize training for staff who manage material at the source—especially in shipping and receiving zones.
- Track material mix quarterly to identify where contamination is coming from and adjust accordingly.
Need support building a better workflow? We can help maximize your plastic recycling efforts.
Why Understanding Plastic Codes Helps Your Operation
Misunderstanding plastic codes leads to avoidable costs. Loads get downgraded. Haulers assess contamination penalties. Recyclable material gets sent to landfill because it was mixed with the wrong items.
Getting this right isn’t a sustainability add-on—it’s an operational win. When your team knows what belongs in your recycling stream, you:
- Cut down on disposal costs
- Increase usable volume for recycling rebates
- Meet internal and regulatory goals without extra effort
Plastic recycling starts with sorting. Sorting starts with understanding the codes.
Take the Next Step Toward Cleaner Plastic Streams
We help Massachusetts facilities take control of their plastic waste, from high-volume HDPE and LDPE, to stretch film and hard-to-recycle materials. If you’re ready to improve your stream quality and reduce contamination, contact us to request a facility assessment.