San Francisco Curbside Recycling: Your Guide to Proper Sorting

Tue Feb 17 2026

Living in San Francisco comes with a commitment to environmental stewardship, and a cornerstone of that commitment is proper waste sorting. The city’s mandatory 3-bin system for curbside pickup — blue for recycling, green for compost, and black for landfill — is designed to maximize resource recovery and minimize waste sent to landfill. Understanding how to use these bins correctly is essential for all residents.

This guide provides clear, actionable instructions to help you sort your waste effectively, reduce contamination, and contribute to San Francisco’s ambitious zero-waste goals. Correct sorting helps ensure materials are processed efficiently and given a new life, rather than ending up in a landfill due to common sorting errors.

Understanding San Francisco’s 3-Bin System

San Francisco operates a unique and mandatory three-bin system for residential waste collection. Each bin serves a distinct purpose, and correct segregation of materials at the source is crucial for the system’s success. The blue bin is for recyclable materials, the green bin is dedicated to compostable organics, and the black bin is for items that cannot be recycled or composted and are destined for the landfill. This system is not just a suggestion; it’s a city requirement aimed at minimizing environmental impact and maximizing the repurposing of waste streams.

The Blue Bin: What is Recyclable in SF?

The blue bin is where clean, dry, and rigid recyclables belong. Proper preparation is key here; items should be empty and generally free of food residue. Items accepted in the blue bin include:

Plastics: Rigid plastic containers, tubs, bottles, and jugs (e.g., milk jugs, detergent bottles, yogurt containers). Rinse them out. Lids can often be recycled if still attached to the container, or collected separately if small.
Metals: Aluminum cans, foil (cleaned), and steel/tin cans (e.g., soup cans). Rinse food cans.
Glass: Bottles and jars of any color. Rinse them out and remove lids (metal lids can be recycled in the blue bin, plastic lids usually go in the black bin).
Paper & Cardboard: Newspapers, magazines, catalogs, junk mail, envelopes, phone books, paper bags, and mixed paper. Cardboard boxes (e.g., cereal boxes, shipping boxes) should be flattened. Pizza boxes are generally okay if mostly clean, but excessively greasy sections should go into the green (compost) bin.

What NOT to put in the blue bin: Plastic bags, plastic film, Styrofoam, ceramics, mirrors, window glass, paper towels, tissue paper, or electronics.

The Green Bin: Composting All Organics

The green bin is for organic materials that can be broken down into nutrient-rich compost. San Francisco’s composting program is one of the most comprehensive in the nation, accepting a wide array of items:

All Food Scraps: This includes fruits, vegetables, meat, poultry, fish, bones, dairy products, eggs, pasta, bread, rice, coffee grounds, and tea bags.
Soiled Paper Products: Paper towels, napkins, pizza boxes (if greasy), paper plates, and food-soiled paper bags.
Yard Trimmings: Grass clippings, leaves, flowers, branches, and other plant debris.

What NOT to put in the green bin: Plastic bags (even if labeled ‘biodegradable’ or ‘compostable’ as they may not break down in commercial facilities), plastic packaging, pet waste, diapers, glass, metal, or ceramics. Use BPI-certified compostable bags only if explicitly instructed by Recology, otherwise, keep it loose or use paper bags.

The Black Bin: Landfill & What Goes Nowhere Else

The black bin is the final destination for items that cannot be recycled or composted. While the goal is to minimize its use, it’s crucial to use it correctly to prevent contamination of other streams.

Items that belong in the black bin include:

Non-Recyclable Plastics: Plastic bags, plastic film, plastic wrap, bubble wrap, Styrofoam (including packing peanuts and foam cups/containers), and many plastic toys.
Ceramics & Glassware: Plates, cups, mirrors, window glass, and lightbulbs (except CFLs, which are hazardous waste).
Soiled Items: Heavily soiled paper or cardboard that cannot go into composting, disposable diapers, and pet waste.
Other: Ash, broken dishes, cigarette butts, and non-recyclable packaging materials.

Important: Never put hazardous waste (e.g., batteries, paint, chemicals, electronics) into the black bin. These require special disposal methods.

Beyond the Bins: Special Disposal Items in San Francisco

Many items are too large, too hazardous, or require specialized processing that the curbside bins cannot accommodate. San Francisco offers dedicated services for these materials:

Hazardous Waste: Paint, chemicals, motor oil, fluorescent bulbs, and batteries should be taken to the Household Hazardous Waste Facility. Check the SF Environment website for details on drop-off locations and events.
Electronics (E-waste): Computers, TVs, printers, and other electronics can often be dropped off at designated e-waste collection sites or during special events. Recology also offers pick-up services for some bulky items including electronics (check their website for scheduling).
Bulky Items: Furniture, mattresses, and large appliances usually require a scheduled bulky item pickup through Recology. Residents are typically allotted a certain number of free pickups per year.
Textiles/Clothing: Donate usable clothing to charities. For unusable textiles, some specialized recycling programs exist, but they do not go into the curbside bins.

Maximizing Your Sorting: Practical Tips for Every Bin

Improving your sorting accuracy benefits everyone. Here are practical tips to help you get it right every time:

Rinse Containers: A quick rinse of food and beverage containers (plastic, glass, metal) helps prevent food residue from contaminating other recyclables and reduces odors.
Flatten Cardboard: Break down and flatten all cardboard boxes to save space in your blue bin and aid in collection.
Avoid ‘Wish-Cycling’: Don’t throw something in the blue bin hoping it’s recyclable. When in doubt, find out, or throw it out in the black bin. Incorrect items contaminate entire loads.
Use Official Resources: The Recology 'RecycleWhere' tool and the SF Environment 'Where Does It Go?' search are invaluable resources for specific items. Bookmark them!
Keep Bins Clean: Line your green bin with newspaper or BPI-certified compostable bags to keep it cleaner and prevent odors.

Your Decision Checklist for Proper Sorting

To help you sort effectively, ask yourself these questions before placing an item in a bin:

Is this item a clean, rigid plastic container, glass bottle, metal can, or paper/cardboard (Blue Bin)?
Is this food waste, soiled paper, or yard trimmings, free of plastic and packaging (Green Bin)?
Is this an item specifically listed as accepted for its respective bin on official SF recycling guidelines?
If it’s plastic, is it a rigid container, or a flexible bag/film that contaminates blue bins?
If unsure, have I used the Recology ‘RecycleWhere’ tool or checked the SF Environment website?
Is this item hazardous waste, e-waste, or batteries that require special drop-off, not a curbside bin?

Common Mistakes to Avoid

Steering clear of these common sorting errors will significantly improve San Francisco’s recycling and composting efforts:

Placing plastic bags (even if recyclable) or flexible plastic film into the blue recycling bin, which jams machinery.
Contaminating the green compost bin with non-compostable items like plastic packaging, ‘compostable’ plastics, or glass.
Putting unrinsed containers with significant food residue into the blue recycling bin, contaminating entire batches.
Wish-cycling: Placing items into recycling bins ‘just in case’ they are recyclable, leading to increased sorting costs and potential landfilling of batches.
Disposing of hazardous waste (e.g., batteries, electronics, chemicals, paint) in any curbside bin, posing environmental and safety risks.

How to Verify in San Francisco Today

Staying up-to-date with San Francisco’s recycling rules is easy thanks to several reliable resources:

Use Recology’s Online Tools: Visit the Recology San Francisco website and utilize their ‘RecycleWhere’ search tool. Simply type in an item, and it will tell you exactly which bin it belongs in, or if it requires special disposal.
Consult SF Environment: The official City and County of San Francisco’s Environment Department website (sfenvironment.org) hosts comprehensive guides, FAQs, and a ‘Where Does It Go?’ search engine that covers almost every item imaginable.
Check Bin Stickers/Labels: Your physical blue, green, and black bins often have stickers or molded labels indicating general categories of accepted materials. While not exhaustive, these serve as a quick visual reminder for common items.

Frequently Asked Questions

### Why is sorting so strict in San Francisco?

San Francisco has ambitious zero-waste goals, and strict sorting prevents contamination. Contaminated recycling or compost loads often end up in landfills, negating the effort. Precise sorting ensures materials can be effectively processed and reused.

### What about items labeled ‘compostable’ like plastic cups or cutlery?

Unless explicitly stated by Recology San Francisco that they are accepted in the green bin, most ‘compostable’ plastics should go into the black landfill bin. Commercial composting facilities in SF may not be equipped to break down these materials within their processing cycles, leading to contamination.

### Can I bag my recyclables before putting them in the blue bin?

No, you should not bag recyclables. Plastic bags, even if containing recyclable items, are considered contaminants in the blue bin. They can tangle machinery at the recycling facility. Place items loose in the blue bin.

Properly sorting your waste in San Francisco is a simple yet powerful way to contribute to a more sustainable city. By following these guidelines, you help ensure that valuable resources are recovered and that our collective environmental impact is minimized.