How to Properly Dispose of Old X-Rays

Old X-ray films should never go in your regular household trash or recycling bin. They contain silver and other heavy metals that can leach into soil and groundwater, and their plastic base does not biodegrade. The proper route is to take them to a specialized recycling service, a medical waste facility, or a film-reclamation company that recovers the silver and disposes of the remaining material safely. Before you get rid of them, though, you need to consider how long you’re required to keep them and how to protect the medical information they contain.

Why X-Ray Films Do Not Belong in the Trash

An X-ray film is not just a sheet of plastic. It is a sandwich of materials: a polyethylene terephthalate (PET) plastic base coated with a gelatin layer embedded with silver halide crystals. When the image is developed, those crystals form metallic silver, which is what creates the dark and light areas you see when you hold the film up to a light box. That silver content is the main reason tossing old films into a landfill is a problem. Silver is classified as a hazardous metal at certain concentrations, and when films break down in a dump, the silver and other compounds can leach out and contaminate the surrounding environment.

Beyond the silver, the plastic base itself is essentially non-biodegradable. Radiologic departments and hospitals generate large volumes of this waste, and improper disposal poses real environmental risks from both the heavy metal content and the persistence of the plastic in the waste stream.¹ In many jurisdictions, throwing X-ray films into general waste violates hazardous waste regulations because of these metals. Even if enforcement is rare for individuals disposing of a few personal films, the environmental reasoning is the same whether it is one film or a thousand.

How Long You Should Keep Them First

Before you dispose of any X-ray, make sure you’re actually allowed to get rid of it. Medical records retention rules vary by country, by state or province, and by the type of image, but the general principle is that you (or your healthcare provider) need to hold on to them for a set number of years.

In the United States, federal regulations require that radiology documents be stored for at least three years, but Medicare-participating hospitals must keep copies of reports, films, scans, and other imaging records for a minimum of five years. Most states follow this five-year floor as well. The Royal College of Radiologists in the UK recommends keeping radiology images for adults up to eight years after discharge and retaining children’s images until the patient turns 25 or 26. Mammography images carry even longer requirements, with recommendations to store them for up to ten years after treatment.²

These rules primarily apply to healthcare providers, not to patients who have copies of their own films. But even as a patient, there are practical reasons to hold on to X-rays for several years. Doctors sometimes compare old images against new ones to track the progression of a condition. If you’ve been treated for cancer, a fracture, or a chronic joint problem, those older films can be medically useful well beyond the minimum legal retention period. A reasonable personal guideline is to keep films for at least five to seven years, or longer if they relate to ongoing conditions, and to check with your doctor before disposing of anything that might still have diagnostic value.

Your Disposal Options

Once you’ve confirmed the films are safe to discard, you have several routes. The right choice depends on how many films you have and what’s available in your area.

• Silver-reclamation companies: These are businesses that buy or accept old X-ray films specifically to recover the silver. Many operate by mail; you ship them a box of films, and they process the material. Some pay you for the silver content, while others accept films for free. A quick online search for “X-ray film recycling” plus your area will usually turn up local and mail-order options.
• Hospital or clinic take-back programs: Some radiology departments and hospitals accept old films from patients and former patients for proper recycling. Call ahead, as not all facilities offer this.
• Hazardous waste collection events: Many municipalities run periodic household hazardous waste drop-off days where you can bring items like paint, batteries, and old X-ray films. Check your city or county waste management website for schedules.
• Specialized medical waste companies: If you have a large volume of films, say from a closing medical or dental practice, commercial medical waste disposal companies handle bulk pickups and ensure regulatory compliance.

Avoid burning X-ray films yourself. The combustion of the plastic base and the silver-laden gelatin layer releases toxic fumes, and in most places, open burning of waste is illegal. Likewise, do not attempt to strip the silver off the films at home using chemical methods unless you have proper training and equipment, as the chemicals involved can be hazardous.

The Silver That Makes X-Rays Worth Recycling

X-ray film recycling is not just about keeping hazardous material out of landfills. The silver embedded in the gelatin coating has real monetary value. Depending on the size and type of film, a single sheet can contain a small but meaningful amount of silver, and when you multiply that across the millions of films generated by hospitals and clinics over decades, the recovered silver adds up to a significant resource.

Industrial recyclers use several methods to get the silver out. Chemical stripping with acids is common, and research has shown that using oxalic acid, for instance, can recover more than 90% of the silver from waste radiographic film under optimized conditions.³ Another approach uses enzymes that break down the gelatin layer, releasing the silver particles rapidly. Researchers have demonstrated that keratinolytic enzymes can strip the gelatin coating and free the silver in as little as six minutes under the right temperature and pH conditions.⁴ The enzymatic approach is appealing because it avoids harsh chemicals and the enzyme solution can be reused across multiple batches.

For the average person with a small stack of old films, the economics of silver recovery are modest: you’re not going to retire on the proceeds of recycling your knee X-rays. But many reclamation companies will accept even small quantities at no cost to you, and some will pay a few dollars per pound of film. The real payoff is environmental: recovering the silver means it doesn’t end up leaching into groundwater, and the PET plastic base can potentially be recycled as well rather than sitting in a landfill for centuries.

Dental X-Rays and Lead Foil

Dental X-ray films are smaller than medical X-rays but present the same disposal issues, plus an additional one: the small lead foil backing found inside traditional intraoral film packets. That lead foil was used to reduce scatter radiation during the exposure, and when tossed into regular trash, it becomes a source of lead contamination.

The American Dental Association has published guidance on managing both the silver waste from used dental fixer solution and the lead waste from intraoral film packets, lead aprons, and lead collars, recommending that all of these be recycled rather than thrown away.⁵ If you’re a patient who still has dental X-rays at home, the same disposal options apply: silver-reclamation companies accept dental films, and hazardous waste collection events typically take small quantities of lead foil. If you still have the original film packets with the foil inside, separate the lead foil from the film and dispose of each through the appropriate channel. Most municipal hazardous waste programs will accept small amounts of lead.

It’s worth noting that most dental practices switched to digital sensors years ago, so new dental X-rays are no longer generated on film. But older films from before that transition can still be sitting in drawers and filing cabinets, and those are the ones that need proper handling.

What About the Fixer and Developer Solutions

If you are cleaning out a medical or dental office rather than just disposing of personal films, you may also have containers of used fixer and developer solutions to deal with. Used fixer is especially important because it absorbs silver during the development process and can contain high concentrations of the metal. Pouring used fixer down the drain is illegal in most jurisdictions because even after the silver is removed, the remaining solution can still exceed pollutant limits for wastewater discharge.

Silver recovery from used fixer is highly efficient. Ion exchange methods, for example, can pull out more than 99% of the silver from radiographic fixer solution.⁶ However, even after silver recovery, the residual chemicals in the solution can still exceed limits set by local pollution control regulations, which means you typically cannot simply dump the post-recovery liquid. The safest approach is to have a licensed waste hauler collect used fixer, or to use a silver-recovery unit and then send the treated effluent through proper wastewater channels with your municipality’s knowledge and approval.

Developer solution is less of a silver concern but still a chemical waste issue. It contains hydroquinone and other compounds that shouldn’t go into storm drains or septic systems. Treat both solutions as chemical waste and dispose of them through the same hazardous waste channels you’d use for the films themselves.

Protecting Your Medical Privacy

X-ray films are medical records. They typically have your name, date of birth, and the date of the examination printed or stamped on them, and sometimes additional identifiers like a medical record number. Before handing films over to a recycling service or dropping them at a hazardous waste event, think about how that information is handled.

Reputable silver-reclamation companies destroy the films as part of the recycling process, since the gelatin coating is stripped away and the plastic base is shredded or melted. This effectively destroys any identifying information. But you should verify this before shipping your films. Ask whether the company provides a certificate of destruction or has a written privacy policy for handling medical records. In the United States, HIPAA applies to healthcare providers and their business associates, so a dental office clearing out old patient films is legally required to use a disposal method that protects patient information. As an individual patient disposing of your own records, HIPAA does not technically apply to you, but protecting your own health information is still common sense.

If you’re uneasy about sending identifiable films through the mail, you can use a permanent marker to black out the printed identification before packaging them. This won’t interfere with the silver-recovery process, since the identifying text is on the film’s surface and the silver is embedded in the gelatin coating underneath.

The Shift to Digital and What It Means for Old Films

Most hospitals and imaging centers made the transition from film to digital radiography over the past two decades. Digital X-rays are captured on electronic sensors or phosphor plates, displayed on screens, and stored on servers or cloud systems. This transition has dramatically reduced the generation of new film waste, but it has also created a different kind of disposal challenge: it means that the old film archives sitting in hospital basements and storage rooms are no longer needed for ongoing clinical use and are becoming candidates for disposal in large volumes.

For patients, the digital shift means that any X-ray films you have at home are probably old enough to raise the question of disposal. If your imaging was done in the last ten to fifteen years, there’s a good chance digital copies already exist in your provider’s picture archiving system. Before throwing out old films, it’s worth calling your doctor’s office to confirm that digital versions are on file. If they are, you lose nothing by recycling the physical films. If they aren’t, and the images are still medically relevant, you could ask a radiology department to digitize them before disposal, though some facilities charge a fee for this service.

The retention timelines discussed earlier apply to digital images as well. Providers still need to keep digital X-rays for the same minimum periods mandated by federal and state regulations, and the American College of Radiology’s three-year federal minimum and five-year Medicare rule apply regardless of format.² The difference is that digital storage doesn’t generate physical waste when images are deleted, which makes the eventual disposal of those records an IT task rather than an environmental one.

When You Have a Large Collection

Some situations involve much more than a few personal films. Veterinary clinics closing down, chiropractic offices going digital, or families inheriting boxes of a deceased relative’s medical records can all produce surprisingly large volumes of X-ray film. In these cases, the economics of silver reclamation become more tangible. A box weighing 40 or 50 pounds can contain enough silver to be worth a meaningful payment from a reclamation company, and several companies offer free pickup for large quantities.

If you’re handling a bulk disposal for a healthcare practice, keep a paper trail. Document how many films or pounds were sent, which company received them, and obtain a certificate of destruction for HIPAA compliance. For inherited personal films, the regulatory burden is lighter, but the disposal method should be the same. Do not take a large quantity of X-ray films to a regular dumpster and assume no one will notice or care. The environmental risk scales with volume, and so does the potential for regulatory problems if the disposal is traced back to you.

For very old films dating to the mid-twentieth century, there’s an additional wrinkle. Some older X-ray films used cellulose acetate rather than PET as the base material. Cellulose acetate can degrade over time, becoming brittle and releasing acetic acid, which gives off a vinegar-like smell. If your old films smell like vinegar, they are actively degrading and should be handled with care. The degradation products are mildly irritating, and the films themselves may be fragile enough to crack or shatter. Wear gloves, keep them in a ventilated area, and get them to a recycling or disposal service promptly rather than letting them continue to break down in a closet.