September 15, 2025

How to Read Recycling Symbols

Recycling seems simple enough, right? You toss plastic in one bin, paper in another, and you are doing your part for the planet. But if you have ever flipped over a plastic container and noticed a little triangle with a number inside, you have probably wondered what those symbols actually mean. The truth is, those tiny numbers can make a big difference in how, or even if, something gets recycled. Understanding recycling symbols helps you reduce contamination in recycling bins, protect the environment, and make smarter choices when you shop.

In this guide, we will break down what those numbers mean, why they matter, and how you can use them to recycle more effectively.

The Basics: What the Symbols Represent

Most plastic containers have a chasing arrows triangle with a number in the center. This is called a Resin Identification Code (RIC). The number tells you what type of plastic the item is made from, and different plastics have different recycling rules. Just because an item has the symbol does not mean it is always recyclable in your area. Local facilities may only process certain numbers, so it is important to know the difference.

Understanding the Numbers (1 through 7)

1. PET or PETE (Polyethylene Terephthalate)

-Found in: Water bottles, soda bottles, salad dressing containers

-Recyclability: Widely accepted by most recycling programs

-Tip: These plastics are lightweight and easily recyclable but are usually downcycled into items like carpets or clothing rather than reused for new bottles.

2. HDPE (High-Density Polyethylene)

-Found in: Milk jugs, shampoo bottles, cleaning supply containers

-Recyclability: Also widely accepted

-Tip: This is one of the safest plastics and often recycled into new bottles, piping, and outdoor furniture.

3. PVC (Polyvinyl Chloride)

-Found in: Plumbing pipes, vinyl flooring, some food wraps

-Recyclability: Rarely accepted

-Tip: PVC can release harmful chemicals when processed, making it less environmentally friendly. Whenever possible, look for alternatives.

4. LDPE (Low-Density Polyethylene)

-Found in: Grocery bags, bread bags, squeeze bottles

-Recyclability: Accepted in some programs but not all

5. PP (Polypropylene)

-Found in: Yogurt cups, straws, bottle caps, takeout containers

-Recyclability: Becoming more widely accepted

-Tip: This durable plastic is often repurposed into storage bins, automotive parts, and even furniture.

6. PS (Polystyrene)

-Found in: Styrofoam cups, egg cartons, takeout clamshells

-Recyclability: Rarely accepted curbside

-Tip: Because polystyrene breaks into tiny pieces, it is difficult to recycle and often ends up polluting waterways. Reduce usage whenever you can.

7. Other (Mixed Plastics)

-Found in: Baby bottles, electronics cases, reusable water bottles

-Recyclability: Varies widely

-Tip: This category includes plastics that do not fit into the other six groups. Some are recyclable, but many are not. Always check local guidelines.

Why These Numbers Matter

Knowing these codes helps you:

Recycle properly - Tossing the wrong plastics in the bin can contaminate entire batches, leading to more waste.

Make smarter purchases - Choosing plastics that are widely recyclable reduces your environmental footprint.

Protect your health - Some plastics, like PVC and polystyrene, can release harmful chemicals. Understanding the codes helps you avoid unnecessary exposure.

Practical Tips for Smarter Recycling

Check local rules: Not all recycling facilities accept every type of plastic.

Clean before recycling: Rinse containers to prevent contamination.

Reduce where possible: Choose reusable bottles, bags, and containers to minimize single-use plastics.

Use store drop-offs: Many grocery stores accept bags, wraps, and films even when curbside programs do not.

Recycling symbols are more than just numbers on the bottom of a container. They are a guide to understanding what happens to your waste and how you can make better choices. By learning these codes, you become part of the solution, helping reduce landfill waste, protect natural resources, and support a healthier planet.