Is 5G Harmful to Dogs? GPS Tracker Radiation Explained

Updated: 4 October 2026

Could 5G, Wi-Fi or radiation from a GPS tracker harm your dog? The question deserves more than a blanket statement that all radiation is harmless. Here, we explain how radio signals work, what research shows and what to consider when your dog wears a wireless device.

Short answer: Everyday exposure from mobile networks, Wi-Fi and pet trackers has not been established as a cause of harm in dogs. Health authorities assess radiofrequency exposure below recommended limits as presenting no established health risk to people. Evidence on dogs wearing specific trackers over many years is more limited, and findings in people or laboratory animals do not provide a guarantee for every product.

What type of radiation do 5G, Wi-Fi and Bluetooth use?

5G is the fifth generation of mobile networks. It describes a communication technology, rather than one particular frequency or exposure level. Mobile networks, Wi-Fi and Bluetooth use radiofrequency electromagnetic fields, often abbreviated to RF-EMF.

These signals belong to the non-ionizing part of the electromagnetic spectrum. This distinguishes them from X-rays and gamma rays.

Type	Examples	Key distinction
Ionizing radiation	X-rays and gamma rays	Has enough energy to ionize atoms and molecules and can damage DNA.
Radiofrequency, non-ionizing radiation	Mobile networks, Wi-Fi, Bluetooth and satellite radio signals	Does not have the photon energy needed to ionize in the same way. At sufficiently high exposure levels, absorbed energy can heat tissue.

The US National Cancer Institute explains this distinction in its overview of mobile phones and cancer.

Non-ionizing does not mean harmless at every intensity. The difference from X-rays explains an important part of the physics. Assessing health risks also requires evidence about exposure and biological effects.

What determines how much exposure a dog receives?

A label such as “5G” or “Bluetooth” does not tell you the exposure level. Relevant factors include transmission power, frequency, antenna design, distance from the body and how often and how long the device transmits.

Transmission power: the energy emitted while the radio is transmitting.
Transmission time: short data transfers and prolonged transmissions create different exposure patterns.
Position: a transmitter worn close to the body needs to be assessed differently from a distant base station.
Network conditions: mobile equipment can adjust its transmissions as coverage changes.
Design: antenna placement and the intended way of wearing the device matter.

Norway’s Radiation and Nuclear Safety Authority, DSA, explains that mobile phones generally need less transmission power with good reception than with poor reception. However, the signal bars in an app cannot be used to calculate exposure from a particular dog tracker.

A device can remain switched on throughout the day without transmitting continuously. Equally, you should not assume that every tracker uses the same transmission pattern.

What do health authorities and exposure guidelines say?

WHO: tissue heating is an established effect at high exposure

The World Health Organization’s explanation of 5G and health identifies tissue heating as the main established mechanism by which radiofrequency fields affect the body at sufficiently high levels. Its guidance explains the role of exposure limits in protecting public health.

This is general human health guidance. It is not a veterinary assessment of every wearable device used on a dog.

Norway’s DSA: assess the overall evidence

DSA assesses radio waves from wireless technology as presenting no health hazard when exposure remains below recommended limits. Its assessment concerns human health.

A research overview published in 2026

In January 2026, the Norwegian Institute of Public Health, FHI, published an umbrella review of weak radiofrequency fields and health effects. It assessed systematic reviews drawing on population studies, animal experiments and laboratory studies of cells and tissues.

Its main finding was that clear health effects below the exposure limits had not been demonstrated for the outcomes examined. FHI found no scientific basis for lowering the existing limits or recommending special measures to reduce exposure.

What ICNIRP limits cover

The 2020 ICNIRP guidelines cover radiofrequency fields from 100 kHz to 300 GHz and are designed to protect people against established adverse effects.

They are relevant to understanding exposure, but are not a separate approval of lifelong use of every body-worn product in dogs.

What do we know specifically about dogs and pet trackers?

Research has assessed radiofrequency exposure in pets. That is different from large studies following dogs wearing a particular tracker throughout their lives.

A 2021 review, Tracking Devices for Pets, assessed exposure from the wider environment, wireless equipment indoors and pet tracking devices. It included technical information about 21 commercially available trackers.

The authors estimated exposure levels to be well below ICNIRP reference levels. They also discussed uncertainty and ways of reducing exposure.

This supports the conclusion that the exposure levels assessed were low. However, the paper was an exposure and risk assessment, rather than a long-term clinical study measuring cancer or other diseases in dogs wearing trackers. It also does not establish the performance or exposure characteristics of every product sold today.

The careful conclusion: The evidence does not establish that dogs are especially vulnerable to ordinary radio signals. It also does not justify promising that every tracker or smart collar is risk-free under all conditions.

What about mobile phones and cancer?

The cancer question has been studied for many years. A useful explanation needs to include newer research and the meaning of earlier classifications.

IARC classified radiofrequency fields as Group 2B

In 2011, IARC, the WHO’s cancer research agency, classified radiofrequency electromagnetic fields as “possibly carcinogenic to humans,” Group 2B.

This category describes the evidence for a possible cancer hazard. It is not a percentage risk, and it does not mean that everyday exposure has been shown to cause cancer. Nor does it establish a cancer risk in a dog wearing a GPS tracker.

A newer review of human studies

A 2024 systematic review by Karipidis and colleagues included 63 articles on the most researched cancer outcomes. It found no association between mobile phone use and increased risk of the head-area tumour types examined.

The findings concern people and the exposure patterns studied. They are not direct long-term evidence about dogs, and they do not cover every possible disease or way of using wireless equipment.

Animal studies need to be included too

It would be too categorical to claim that animal studies have never found adverse effects. A 2025 systematic review by Mevissen and colleagues assessed 52 studies involving laboratory animals.

The authors rated the evidence as high certainty for increased occurrence of brain gliomas and malignant heart schwannomas in male rats in the relevant experiments. These findings matter when assessing potential cancer hazards.

They also emphasized that translating risk from animal experiments to people is particularly complex for radiofrequency fields. The results cannot simply be used to calculate risk for a dog wearing a tracker: species, exposure level, duration, frequency and whole-body versus localized exposure all need consideration.

The findings should neither be omitted nor presented as proof that ordinary 5G exposure causes cancer in dogs. They support continued research and careful interpretation.

GPS is not the same as a mobile network

A pet tracker may use several radio systems for different tasks. Calling all of them “GPS radiation” obscures what the device actually does.

Technology	Purpose	What to know
GPS and other satellite navigation systems	Receive satellite signals to calculate location.	A conventional navigation receiver does not send the dog’s location back to GPS satellites.
Mobile network	Transfers location data to the service that displays it in the app.	The transmitter performs a separate task from the satellite receiver. Network technology and transmission patterns vary.
Bluetooth	Communicates with nearby equipment, such as a phone.	Has a short range. Its role and update behaviour depend on the product.
Wi-Fi	May support communication or other functions in some products.	Not every dog tracker uses Wi-Fi.

The fact that a mobile operator offers 5G does not tell you which radio technology a particular tracker uses. Check the product’s technical documentation.

Learn more in our guide to how GPS dog trackers work. For the differences between mobile-network tracking and Bluetooth tags, see GPS dog trackers compared with AirTag.

What should you check before choosing a dog tracker?

A general article about radio waves cannot replace documentation for the product you buy. Look for an identifiable manufacturer, a clear model name and instructions explaining intended use.

Check	Why it matters
Applicable conformity marking and declaration	Radio equipment sold in the EEA must meet relevant requirements and carry CE marking. Documentation should identify the correct model. Other markets have their own requirements.
Radio technology and frequency bands	These identify the transmitters in the device. Marketing terms alone are insufficient.
Intended position and use	Instructions should explain how the device should be fitted and used.
Weight, size and attachment	The tracker should sit comfortably without restricting movement or creating pressure.
Battery and physical condition	Damage, unusual heat or a damaged battery means use should stop.
Location update modes	More frequent reporting can change battery consumption and transmission patterns.

Norway’s communications authority, Nkom, explains EEA requirements for conformity assessment, CE marking and equipment documentation.

CE marking indicates that the manufacturer declares compliance with applicable requirements. It is not an individual veterinary approval or a guarantee against every possible problem in a dog.

Practical precautions when your dog wears a tracker

Check fit and your dog’s response from the first day. A tracker that rubs, swings loosely or can be chewed needs a different arrangement, regardless of its radio signals.

Choose a suitable size. Consider your dog’s build and how the device sits, especially on a small dog or puppy.
Follow the fitting instructions. Check that the attachment and collar are intact and secure.
Introduce it gradually. Allow your dog to become comfortable with the equipment before longer use.
Check for irritation. Inspect the skin and coat around contact points.
Use features when needed. Follow the manufacturer’s advice on normal tracking and modes with frequent updates.
Stop using damaged or unusually hot equipment. Do not use a device with a damaged or swollen battery.

For young dogs, see our guide to puppy GPS trackers, fit and practical safety. You can also read our guide to dog tracker battery life.

Do not wrap a transmitter in metal or improvised “radiation shielding.” This can interfere with communication and affect operation. Use the equipment as instructed.

What if your dog becomes unsettled or develops skin problems?

A change after introducing new equipment deserves attention. Timing alone does not establish that radio signals caused it.

Remove the equipment and look for practical explanations such as pressure, rubbing, trapped moisture, an overly tight collar or a device the dog is trying to scratch or bite. Note when the problem started and how the equipment was being used.

Contact your vet for wounds, persistent skin irritation, pain or a clear change in your dog’s general condition. Do not attribute new symptoms to “5G” without considering other causes.

If the device becomes unusually hot, is damaged or develops battery problems, stop using it. Contact the supplier and follow its safety instructions.

Frequently asked questions about 5G, radiation and dogs

Has 5G been shown to harm dogs?

Everyday 5G exposure has not been established as a cause of harm in dogs. That does not mean every exposure level or product has been examined in long-term dog studies.

Can mobile radiation damage DNA in the same way as X-rays?

No. Radiofrequency signals do not have the photon energy needed to ionize in the way X-rays can. That distinction alone does not answer every question about possible biological effects.

Are Wi-Fi and Bluetooth the same as 5G?

No. They are different communication technologies, although all use non-ionizing radio signals. Exposure depends on the equipment and how it operates.

Does a GPS tracker transmit to satellites?

A conventional GPS receiver listens to satellite signals to calculate location. The tracker then uses a separate communication system, often a mobile network, to transfer data.

Have animal studies found cancer effects?

Yes. A 2025 review rated the evidence as high certainty for certain tumour types in male rats in relevant experiments. Those findings alone cannot quantify the risk from everyday use of a dog tracker.

Does IARC Group 2B mean a GPS tracker causes cancer?

No. The classification concerns a possible cancer hazard from radiofrequency fields. It is not a risk calculation for a particular product or dog.

Is a CE-marked tracker guaranteed to be safe for every dog?

No. CE marking concerns compliance with applicable product requirements. Fit, physical condition and use according to instructions still need assessment.

Are small dogs automatically more vulnerable to radio signals?

Size alone does not establish that conclusion. Exposure depends on several technical and biological factors. Device weight and fit are especially important to check on small dogs.

Does a tracker transmit continuously while switched on?

Not necessarily. Many devices alternate between idle periods, receiving signals and transmitting data. The pattern varies with model, settings and network conditions.

Should I turn off Wi-Fi at home for my dog?

The evidence discussed here does not support a general recommendation to remove ordinary home Wi-Fi for a dog’s health. Assess specific equipment questions using product information and relevant expert guidance.

Can my dog wear a tracker all day?

Follow the instructions for the specific model. Check that it remains comfortable and does not cause skin problems, snagging or other practical hazards. General information about radio waves does not replace that assessment.

Sources and further reading

This article provides general information about research and wireless equipment. Contact a vet if your dog develops health problems. Product-specific questions require documentation for the model concerned.

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5G and Radiation: Are Mobile Networks and GPS Trackers Safe for Dogs?