San Francisco Residential Composting Rules: A Practical Guide for Residents

San Francisco leads the nation in waste diversion, and its mandatory composting program is a cornerstone of this effort. Understanding and adhering to the city’s residential compost collection rules is not just about compliance; it’s about contributing to a healthier environment by diverting valuable organic materials from landfills. This guide provides clear, practical information for every San Francisco resident.

Understanding SF’s Mandatory Composting Program

San Francisco’s commitment to zero waste has made composting a requirement for all residents, businesses, and institutions. This mandate ensures that organic waste, which constitutes a significant portion of our discarded materials, is properly recycled into nutrient-rich compost. Diverting food scraps and yard trimmings from landfills prevents the production of methane, a potent greenhouse gas, and creates a valuable soil amendment for local farms and gardens. By participating, you help extend landfill life, conserve natural resources, and reduce your carbon footprint. Every San Franciscan plays a vital role in this environmental initiative.

Accepted Materials: What Goes in Your Green Bin

Knowing exactly what to place in your green compost bin is crucial for effective composting. The rule of thumb for San Francisco residential composting is “if it grows, it goes” – with some important additions.

Food Scraps

  • All cooked and uncooked food, including fruits, vegetables, meat, poultry, fish, bones, dairy products, and eggs/eggshells.
  • Bread, pasta, rice, grains.
  • Coffee grounds and filters, tea bags.
  • Leftovers, even if spoiled.

Yard Trimmings

  • Grass clippings, leaves, flowers, weeds.
  • Small branches and twigs (less than 4 feet long and 4 inches in diameter).
  • Untreated wood scraps (sawdust, wood chips).

Soiled Paper & Other Organics

  • Food-soiled paper products like pizza boxes (greasy parts ok), paper plates, paper towels, and napkins.
  • Compostable bags (BPI-certified only).
  • Pulp fiber-based pet food bags.
  • Hair (human and animal, small quantities).

If you’re ever unsure about a specific item, it’s always best to check official resources to avoid contamination.

Prohibited Materials: What Must Stay Out

Contamination is the biggest challenge for composting programs. Placing non-compostable items in your green bin can ruin an entire batch of compost, requiring manual sorting or even diverting the whole load to a landfill. Avoid these items at all costs:

  • Plastics: Any type of plastic, including plastic bags, plastic packaging, plastic cutlery, and plastic-lined containers (e.g., milk cartons, juice boxes). This is especially critical – even “biodegradable” or “plant-based” plastics are often not accepted unless BPI-certified compostable.
  • Glass and Metals: Jars, bottles, cans, aluminum foil.
  • Liquids: Large amounts of liquid such as soups, oils, sauces, or milk should be poured down the drain (grease should be solidified and placed in the black bin if not suitable for green bin).
  • Styrofoam: All forms of Styrofoam.
  • Pet Waste: Animal feces, cat litter, or any pet waste products. These can contain pathogens harmful to compost.
  • Diapers: Disposable diapers.
  • Hazardous Waste: Batteries, chemicals, paint, electronics.
  • Treated Wood: Lumber, plywood, particleboard.
  • Non-compostable Paper: Waxed paper, glossy paper, photographs.
  • Fabrics: Clothing, rags, shoes.
  • Ceramics/Pottery: Broken dishes, planters.

Preparing Your Compost: Bins, Bags, and Best Practices

Proper preparation ensures a smooth collection process and keeps your composting experience clean and odor-free.

Internal Collection

Many residents use a small countertop bin or a sealed container to collect food scraps indoors before transferring them to the larger green bin. This minimizes odors and makes daily composting convenient. You can line your indoor bin with newspaper, a BPI-certified compostable bag, or simply rinse it out regularly.

Liners and Bags

Only use BPI (Biodegradable Products Institute)-certified compostable bags if you choose to line your green bin or collect scraps in bags. These bags are designed to break down in commercial composting facilities. Never use standard plastic grocery bags or “biodegradable” bags that are not BPI-certified, as they contaminate the compost stream. You can also opt for no bag at all, placing materials directly into the bin and rinsing it after collection.

Best Practices for Your Green Bin

  • Layering: Placing yard waste (like leaves or grass clippings) at the bottom of your green bin can help absorb moisture and prevent food scraps from sticking.
  • Drain Liquids: Before placing food scraps, drain excess liquids.
  • Keep Lid Closed: Always ensure your green bin lid is securely closed to prevent pests and odors, especially between collection days.

Your Composting Decision Checklist

Use this checklist to quickly determine if an item is suitable for your San Francisco green bin:

  • Is this item a food scrap (fruits, vegetables, meat, dairy)?
  • Is this item soiled paper or cardboard (pizza boxes, paper towels, coffee filters)?
  • Is this item yard waste (leaves, grass, small branches)?
  • Is this item free of plastic, glass, metal, or non-compostable liquids?
  • Is your compost bin lid fully closed before placing it for collection?
  • Is your green bin set out by 6 AM on your designated collection day?

Collection Schedule, Set-Out Rules & Bin Maintenance

Understanding your specific collection schedule and proper bin placement is key to successful residential composting in San Francisco.

Finding Your Collection Schedule

Recology, San Francisco’s waste hauler, provides personalized collection schedules.

  1. Online Tool: Visit the Recology San Francisco website and use their “My Schedule” tool by entering your street address. This will provide your specific pickup days for compost (green bin), recycling (blue bin), and landfill (black bin).
  2. App: Download the Recology SF app for reminders and schedule access on your mobile device.

Set-Out Rules

  • Time: Place your green bin at the curb or designated collection point by 6:00 AM on your scheduled collection day. Some areas may have evening set-out times (after 6:00 PM) the night before; confirm with Recology.
  • Placement: Ensure bins are placed with wheels against the curb and lids facing the street, allowing easy access for collection trucks. Leave at least three feet of clearance around each bin.
  • Lid Closed: The lid must be fully closed to prevent spills, pest access, and to ensure collection. Overfilled bins with open lids may not be collected.

Bin Maintenance

  • Rinse Regularly: After collection, rinse your green bin with water and a mild, biodegradable soap to remove residue and prevent odors. Let it air dry.
  • Deodorize: For persistent odors, sprinkle baking soda at the bottom of the bin.
  • Pest Control: Keeping the lid tightly closed is the best defense against pests. If fruit flies or maggots appear, you can rinse the bin with a solution of vinegar and water. Freezing very wet food scraps before placing them in the bin can also help.

Troubleshooting Common Issues & Official Resources

Even with the best intentions, questions or issues can arise. Here’s how to address them and find further assistance.

Common Issues & Solutions

  • Missed Collection: If your bin wasn’t collected, first verify your collection day and ensure the bin was properly placed with the lid closed. Contact Recology customer service promptly.
  • Excess Waste: For occasional excess organic waste, Recology offers additional collection services, often for a fee. Check their website or contact them. Do not place overflow next to your bin without prior arrangement.
  • Odors/Pests: Re-evaluate your bin maintenance and food scrap preparation (draining liquids, layering). Ensure the lid is always securely closed.
  • Damaged Bin: If your bin is damaged, contact Recology for repair or replacement.

Official Resources

For the most current and detailed information, always refer to the official sources:

  • Recology San Francisco: The primary service provider for waste collection. Their website (recology.com/san-francisco) is comprehensive for schedules, accepted materials, and service requests.
  • San Francisco Environment Department (SF Environment): Provides policy guidance, educational materials, and general information on the city’s waste diversion initiatives (sfenvironment.org).
  • Customer Service: For specific questions or service issues, contact Recology SF customer service directly via phone or their online portal.

Avoid These Common Composting Mistakes

Make sure you’re not falling into these common traps that can hinder San Francisco’s composting efforts:

  • Using non-compostable plastic bags or grocery bags to line compost bins or dispose of organics.
  • Placing liquids (soups, oils, sauces) directly into the green bin, causing mess and contamination.
  • Including pet waste, kitty litter, or diapers in the green bin, which are not accepted.
  • Failing to separate food scraps from non-compostable packaging (e.g., throwing a whole packaged sandwich).
  • Putting items like dryer lint, vacuum contents, or ashes into the compost bin.
  • Overfilling the green bin or leaving the lid ajar, attracting pests and scattering contents.

How to Verify in San Francisco Today

To ensure you have the most accurate and up-to-date information regarding San Francisco’s residential compost collection rules, follow these practical verification steps:

  1. Visit the Official Recology San Francisco Website: Navigate to recology.com/san-francisco. Look for sections like “What to Put in Your Bins,” “Residential Services,” or use their “My Schedule” tool to confirm collection days for your specific address. This is the primary source for operational details.
  2. Check the San Francisco Environment Department Website: Go to sfenvironment.org and search for “compost” or “waste diversion.” This site provides city-wide policy information, educational resources, and links to relevant ordinances. It confirms the mandatory nature and benefits of the program.
  3. Contact Recology Customer Service Directly: If you have highly specific questions not covered by the websites (e.g., unusual items, bin repair, or specific collection issues), call Recology SF customer service. Their phone number can be found on their website, typically in the “Contact Us” section. This provides personalized, authoritative answers.

Frequently Asked Questions (FAQ)

Q: Can I use any “biodegradable” bag for my compost?
A: No. In San Francisco, you must only use bags certified by the Biodegradable Products Institute (BPI) for composting. Generic “biodegradable” or “compostable” labels are often not sufficient, as these products may not break down in commercial composting facilities and can contaminate the compost stream. Look for the BPI certification logo.

Q: What if I have too much yard waste for my green bin?
A: For occasional excess yard waste, you can often arrange for extra pickup with Recology, though additional fees may apply. Check their website or contact customer service for options. Some communities also have designated drop-off sites or seasonal events for large volumes of yard waste.

Q: Can I put coffee pods or K-cups in the compost bin?
A: Most coffee pods, including K-cups, are not accepted in San Francisco’s residential compost bins because they often contain plastic or aluminum components that do not break down in the composting process. Some brands offer BPI-certified compostable pods, but always verify the certification before placing them in the green bin. If not certified, empty the coffee grounds into the compost and dispose of the pod in the landfill bin.

Q: Is it true that San Francisco has mandatory composting?
A: Yes, San Francisco was one of the first cities in the U.S. to implement mandatory composting for all residents and businesses, making it a legal requirement to separate organic waste from landfill and recycling.