Back to Blog

10 Ways to Avoid Recycling Contamination at Home [+Tips]

Woman sorting her recycling bin

Recycling contamination has become a big problem over the past few years. After policy changes and procedural changes, it is no longer ok to throw anything you think can be recycled in the bin. This is what leads to contamination of recyclables. It’s becoming more and more important to recycle smarter so recycling facilities can utilize high quality materials and avoid pitfalls.

When we throw just anything in the bin, that ends up costing municipalities a ton of our tax money in extra disposal fees due to contaminated loads and can put the entire infrastructure of recycling at risk of falling apart. Several recycling facilities across North America are struggling to stay open due to these high costs. Here are some helpful tips that can help you avoid recycling contamination and keep your facility running so we can help our environment by recycling. 

1. Empty and Clean Your Containers

Kitchen sink running water to show recycled containers must be cleaned in order to avoid contamination
A quick rinse in the sink or in left over dishwater will clean containers without hassle.

The Problem: Containers with a ton of residue from food or other products, can easily contaminate other recycling such as paper and cardboard once it’s all compacted together in the truck. Wet and soiled paper or cardboard is unusable at recycling facilities and will be diverted back into landfills instead of recycled.

Also, when plastics, glass, and metal are recycled, they use a high temperature melting point that will burn off small amounts of food and other residue, but if you throw something that has a lot of stuff stuck to the inside, like an unrinsed peanut butter jar, it won’t all burn off and it could ruin the whole batch of plastics it’s with. Plus all that food residue can attract pest at the recycling facility!

Pro Tip: Cleaning containers does not mean a full scrub down or a run through the dishwasher, but a simple swish and rinse should do the trick most of the time. If you put the cap back on with a bit of water inside and shake well then empty, most residue comes off pretty quickly. It’s even better if you can reuse dishwater. It’s also smart to leave rinsed containers on the counter to dry for a bit as well so they don’t dampen paper or cardboard already sitting in your bin.

2. Get Rid of Food Grease Before Disposal

Many people grabbing their own slice of pizza from a cardboard pizza box. The pizza grease contaminates the cardboard for recycling purposes
Pizza grease is a huge problem for cardboard recycling.

The Problem: Food grease on paper or cardboard packaging can cause major issues when being processed. There isn’t any good way to sort out that greasy pizza box or greasy paper sandwich wrapper, so it gets mixed and pulped with there rest of the paper and cardboard. Oil and water don’t mix, so that grease really can gunk up the process of recycling paper and ruin a whole batch of perfectly good paper pulp.

Pro Tip: Remove the greasy portion of your pizza box to put in the garbage and only recycle the clean top of the box. If any of your paper food packaging has grease on it, throw it in the garbage so it doesn’t contaminate a whole batch of perfectly good recyclable paper and cardboard.

3. Never Put Plastic Bags in your Recycling Bin

Person holding up a clear plastic bag which is not an accepted recycling item in home bins
Plastic bags should not go in your home bin, but there are alternative ways to recycle them.

The Problem: Plastic bags are one of the number one recycling contaminators. Plastic bags get tangled in the gears at recycling facilities, which can be a big hazard to the workers who have to untangle them. Therefore they are not accepted at sorting facilities and should not be put in your home recycling bin.

Pro Tip: Luckily, there are many retailers who have drop-off bins where you can recycle your plastic bags. Just keep saving and stuffing those plastic bags and bring them to a drop-off location instead of putting them in your home bin. 

4. Donate Your Plastic Containers

Donate extra plastic food containers to locations that help feed people in need.

The Problem: Black plastic take out containers are not accepted in most curbside recycling programs. Sorters are unable to distinguish between this type of plastic and other plastics, so it gets mixed into the load causing contamination. There is no good market for black rigid plastics in most places. Check the What Goes Where search tool in the Recycle Coach mobile app to see if there are additional options for disposing of this material near you.

Pro Tip: If you can’t avoid getting these containers with your take-out, try washing them out and saving them to donate to food kitchens that make and distribute meals for homeless people. 

5. Check Which Plastics are Accepted in your Area

Many different plastic containers in different shapes, sizes, and colors
Different plastics have different recycling rules

The Problem: There are several different types of plastics made of different compounds which all get broken down and recycled differently. Not only are they processed differently, not all locations accept the same types. They only can accept what their specific facility can process, so even if there is a recycle loop on the plastic, it may not be recycled where you are located. If you throw it in anyway, you might be contaminating your recycling!

Pro Tip: When dealing with plastic, first check for that recycle loop on the packaging, and if there is a number, look it up! #1 and #2 plastics are accepted almost universally, but #3-7 can get a bit tricky. Check what your local municipality accepts by searching the “What Goes Where” search function on the Recycle Coach app or your municipality’s waste management website. If you are still unsure, don’t risk contamination, just throw it in the garbage. If it’s not accepted and you throw it in anyway, it does more harm than good!

6. Do Not Throw Batteries in the Recycling Bin

Close up of hands holding batteries (a common recycling contaminant)
batteries have special rules for recycling and should not go in your home bin

The Problem: The dangers of throwing batteries (especially rechargeable batteries such as lithium ion batteries) in the recycling bin include fires due to combustion and hazardous chemical leaks. Even if no fire occurs, when you throw your batteries in your home recycling bin, they will get compressed in the truck and leak over other materials like paper and carboard. This would contaminate those otherwise recyclable materials and render them unusable.

Pro Tip: There are great programs to recycle batteries, such as Call2Recycle’s drop-off locations or send in programs. Please keep the recycling workers safe by utilizing one of the mail-in or drop-off options instead of contaminating your home recycling bin.

7. Coffee Cups go in the Garbage

Woman walking through town looking at her phone while holding a disposable coffee cup (a common recycling contaminant)
Coffee to go is fun, but it becomes impractical when recycling

The Problem: Paper cups are a problematic item because contrary to the name, they are not completely paper. The have a plastic lining that would not be suitable for mixing with paper pulp while recycling. Therefore it is extremely rare that a curbside recycling program would accept this type of item. Always double check your local program to see. If you’re unsure, don’t risk contamination and just throw these in the garbage.

Pro Tip: Use a regular coffee mug! Any reusable coffee container would be infinitely better for the environment if you drink coffee regularly. Just think of how much less waste you’d create! Most coffee shops will allow you to bring in your own reusable to-go cups.

8. Look at the Label on Freezer Boxed Items

Many reusable food storage containers filled with meals
Reusable containers are always a better option than other packaging

The Problem: Cardboard looks pretty much the same for any food box, but it’s not. Frozen Food items in cardboard boxes are usually lined or treated with plastic or wax in order to prevent freezer burn on your food. There is no good way to sort these from regular cardboard food boxes, so they can easily contaminate a batch of recyclable cardboard with unnoticed plastic.

Pro Tip: Try to buy fresh foods instead of frozen. If you still need to freeze them, you can try using reusable containers, reusable food storage bags or beeswax wraps.

9. Soft Paper Products belong in the Garbage

Close up of a tissue box on a shelf, a material that is not recyclable
Tissues, napkins, and paper towels are all examples of soft paper products

The Problem: Many people think that since paper towels, napkins, and tissues are made from paper, that they are recyclable. They are not. Not only are these products usually soiled by the time they are ready to be disposed of, they are also made of fibers that are already at their smallest usable components. Therefore this is an item that can easily contaminate recycling.

Pro Tip: Choose more sustainable options, the easiest being towels instead of paper towels. With sustainable options become a bigger market, it may be time to bring back cloth napkins and handkerchiefs! There are some companies trying to solve this problem with a washable fabric alternative to disposable paper.

10. Find the Right Place for Hard to Dispose Items

a pile of junk and large containers that may hold hazardous materials which can contaminate recycling
Hazardous materials should not be placed in home recycling bins

The Problem: Recycling facilities are constantly inundated with biohazards and hazardous waste, furniture, gardening equipment, you name it. In an ideal world all of it would be recycled, but at this point in time, many items aren’t and need special disposal methods.

Pro Tip: There are different locations for hazardous waste, electronics, clothes, etc. as well as times for bulk item pick-ups (such as furniture) or scheduled donation pick-ups. Look it up! Don’t contaminate your recycling with what you hope might be recycled. The Recycle Coach app allows you to look up any item and see how to dispose of it in your municipality.

Solving the Problem of Recycling Contamination

Gloved hands sorting through different garbage and recyclables to avoid contamination
Learning what your municipality accepts can make avoiding contamination much easier.

It can be overwhelming when you see how much can recycled in your home bin compared to what you want to recycle, but luckily there are so many alternative options for items to be dropped off or sent in. It just requires a little more planning, but the environmental benefits are well worth that extra sorting. It’s also always a good idea to look for more sustainable options whenever possible in order to avoid the landfill.

It is important to maintain a healthy recycling program so we can make better use of our limited resources and help reduce our carbon emissions. If we learn to stop recycling contamination, we will be able to help our recycling facilities flourish safely and efficiently. Think of the positive effect this will have on your municipality’s economy and the environment. It’s a win-win! All we need is a little bit of knowledge about what goes where.

It’s always important to check with your specific municipality about what is recycled at their facility. To do this, download the Recycle Coach app and search the “What Goes Where” feature so you can be better informed and avoid recycling contamination.


  1. Steven Guarneri

    July 12, 2021 at 9:41 am

    Why not have a bar or QR code on the items and have a data base so you you know if it’s except-able in your area. I’ve been buying bottle water from Costco and recycling them. There is no triangle but there is a bar code on the wrapper which states that you get 5 or 10 cents depending on the state. The frozen food bowl are are coated paper and not recycled in all communities. By making it easier to know what to do with it you can eliminate a lot of uncertainty and avoid contamination and help keep recycling companies stay in business.

    • April

      July 12, 2021 at 10:28 am

      Great comment! The idea is good, but the implementation would be tough. In order to require all companies to add something to their label, it would take a unified legislation across the country to require something new on the label of all products from all manufacturers. There is also the factor that every recycling facility has different rules for acceptance based on what their facility has the capacity to process, and what manufacturers they are able to sell recycled materials to. The Recycle Coach app is an easy way to sort this all out since it has municipality specific information based on municipality participation and input. You just type in the item you’re unsure of and it will tell you where it goes based on your specific location.

  2. Battery Recycling Box

    July 20, 2021 at 7:22 am

    I found in your article some very good tips on how to recycle household waste. I learned new and useful things. I am especially interested in recycling used batteries. They have a special recycling regime. Thank you for your work in writing this article.

  3. Nikunj

    August 7, 2021 at 7:38 am

    In an effort to avoid recycling contamination, the best thing you can do is place all plastic and glass in one bag in order to avoid mixing materials. Another way to further combat recycling contamination is by sorting your paper from plastics.

    • April

      August 9, 2021 at 8:43 am

      Thank you for your additional advice, although it is location dependent. What you’re describing is a duel stream recycling system which requires residents to keep containers and fibers separate. Most municipalities utilize a single stream recycling system where residents can place all allowable recycling in one curbside bin which is sorted at the recycling facility. Also, placing items in a bag is location dependent. Many municipalities prefer recyclable materials to be loose in the bin to make it easier for machine sorting. Please check with your municipality before placing your recycling in a bag, as many locations do not accept items that are bagged and will send them to landfill if they can’t see what is inside.

  4. Hailey Miller

    August 27, 2021 at 1:14 am

    Thanks for pointing out that containers can easily contaminate other recycling materials like paper and cardboard. This is really informative because my husband and I have decided to start protecting the environment for our five children. With this, we are hoping to find hazardous waste disposal experts on Monday who can collect our waste every week.

  5. Bin Rental Windsor

    October 12, 2021 at 1:40 am

    I just found your article and wanted to share it with some friends. I hope you don’t mind me sharing it publicly so they can find the article too.
    Thanks for writing such an awesome post!

    • April

      October 12, 2021 at 6:26 am

      Of course, feel free to share!

  6. Eli Richardson

    November 12, 2021 at 2:23 pm

    I’m glad you talked about the importance of recycling at home and doing it in the right way! Recently, my wife and I decided we’d like to start a recycling program in our neighborhood. We want to reduce our waste impact, so we’ll be sure to read and follow your tips! Thanks for the advice on how we must clean any food residue from a container before recycling it.

  7. Judith Webster

    May 4, 2022 at 2:14 pm

    Single stream recycling may be easier at first but it IS the cause of a lot of contamination. Why not go back to separate recycle bins to catch the “problem” items. Coated paper for one, misc. product wrappings & questionable plastics; general single stream paper/plastic/metal; soggy paper & cardboard (usually from bring in the rain waiting for recycle day); hazards.

    • April

      May 6, 2022 at 7:04 am

      These are really good points Judith. There are still many locations that use a dual stream system to at least keep paper/cardboard separate to reduce contamination. Everything just depends on each facilities’ capabilities within their budget. Maybe we’ll have more locations moving to separate bins, but for now we need to work with what the system is like in order to improve our recycling recovery rate now.

Comments are closed.