For decades, official advice on radiofrequency electromagnetic fields has largely rested on a reassuring message: keep exposure below established limits and there should be no significant risk to health.
In September 2026, however, two US federal agencies independently opened major consultations on whether the evidence base behind those assumptions needs another look.
The US Department of Health and Human Services (HHS) is asking scientists, doctors, industry, public health specialists and the public for evidence on electromagnetic fields and wireless radiation, including possible effects below existing exposure limits.
At almost exactly the same time, the Federal Communications Commission (FCC) reopened consideration of questions concerning children, long-term exposure, modern wireless technology and mobile phone testing.
Meanwhile, France’s national health and safety agency, ANSES, has launched its latest dedicated research programme into radiofrequency exposure and health.
None of this means that regulators have concluded that Wi-Fi, mobile phones or 5G are dangerous.
It does mean something important, however: questions about long-term, cumulative and real-world wireless exposure have not disappeared.
And for the UK, which still bases public exposure policy largely on ICNIRP guidelines developed in the 1990s, the developments deserve attention.
What has the US Department of Health and Human Services announced?
On 17 September 2026, HHS issued a formal Request for Information on Electromagnetic Fields, Radiofrequency Radiation and Wireless Radiation Exposure.
The scope is unusually broad.
HHS specifically lists exposure from:
- mobile phones
- Wi-Fi
- smart meters
- wireless infrastructure
- wearable devices
- wireless medical devices
- 5G and 6G
- satellite communications
- Internet of Things devices
- smart homes and smart cities
- autonomous vehicles
Rather than simply asking whether individual devices comply with existing standards, HHS is asking more fundamental questions about how exposure should be assessed.
These include whether present standards adequately address health risks, how real-world exposure should be measured, what research gaps remain and whether potentially sensitive groups need different consideration.
Those groups specifically include children and pregnant women.
Perhaps most significantly, the Department is expressly requesting scientific evidence concerning possible adverse health effects from RF radiation at exposures below current federal limits. It is also asking about cumulative exposure from multiple existing and emerging technologies.
That is a rather different question from simply asking whether a phone, router or mast complies with today’s numerical limits.
Why cumulative exposure matters
Modern wireless exposure bears little resemblance to that of the 1990s.
A person might now spend almost the entire day within range of multiple radiofrequency sources: smartphones, neighbouring phones, Wi-Fi routers, Bluetooth devices, wireless headphones, smart televisions, smart meters, mobile phone base stations and increasingly a range of connected domestic appliances.
Many devices transmit intermittently rather than continuously, and exposure varies enormously according to distance, network conditions, data transfer and how equipment is being used.
This creates an important distinction between regulatory compliance and exposure reduction.
A home can comply comfortably with official limits while still containing avoidable RF sources close to beds, desks and other locations occupied for many hours each day.
HHS is now explicitly asking researchers how these real-life cumulative exposure patterns should be investigated.
The FCC is also reopening the question
On the same day, 17 September 2026, the FCC released a public notice seeking new evidence concerning issues previously returned to it by the US Court of Appeals.
The background stretches back several years.
In 2021, the Court of Appeals for the District of Columbia Circuit considered a challenge to the FCC’s decision to retain its RF exposure framework.
The court did not strike down the standards.
It did, however, require the FCC to provide a better explanation for its conclusions regarding several specific questions.
The issues included:
- the way mobile phones and other portable devices are tested for compliance;
- RF exposure and children;
- the possible implications of long-term exposure;
- the enormous growth in wireless devices and technological change;
- possible environmental effects.
The FCC’s September 2026 consultation therefore asks interested parties to submit evidence addressing those questions and the methodological quality of the research relied upon.
Comments are due by 22 October 2026.
Again, this should not be misrepresented as the FCC declaring its existing limits unsafe. The existing US standards remain in force.
What it demonstrates is that important questions about how those standards relate to today’s exposure environment remain under regulatory examination.
Why are the existing US limits attracting attention?
The FCC’s core RF exposure limits date back to 1996.
That does not automatically make them wrong. Old standards can remain valid if subsequent evidence continues to support them.
But the wireless environment of 1996 was radically different.
There were no smartphones, domestic Wi-Fi networks, Bluetooth earbuds, smart watches, connected appliances or nationwide 5G networks. Children were not routinely carrying wireless computers in their pockets.
That change in exposure patterns is one reason the American court specifically required the FCC to consider technological developments and the ubiquity of wireless devices.
The more fundamental scientific debate concerns what health endpoints exposure limits should be designed to prevent.
Traditional RF standards have been strongly influenced by established effects associated with tissue heating at sufficiently high exposure levels.
A continuing area of scientific disagreement is whether chronic exposure at substantially lower intensities can produce biologically significant effects through mechanisms that are not adequately represented by short-term thermal measurements.
That disagreement is one reason further research continues.
France is funding more radiofrequency health research
The United States is not the only country asking additional questions.
France’s Agency for Food, Environmental and Occupational Health & Safety, ANSES, launched a new dedicated research call in July 2026 on Radiofrequencies and Health.
The programme aims specifically to fill gaps in knowledge concerning current and developing wireless technologies.
Its research priorities include:
- cellular and molecular mechanisms;
- possible physiological and health effects;
- electromagnetic hypersensitivity;
- better characterisation of real-world RF exposure.
ANSES says the programme is intended to generate evidence useful for future health risk assessments and public policy.
The existence of such programmes is worth remembering whenever the subject is presented as scientifically closed.
If every important question had already been answered, governments would have little reason to continue funding research designed specifically to fill gaps in the evidence.
What about the UK?
UK policy remains substantially based on guidelines produced by the International Commission on Non-Ionizing Radiation Protection (ICNIRP).
UKHSA states that public exposure policy implements the 1999 EU Council Recommendation, which in turn refers to the 1998 ICNIRP guidelines.
Ofcom also requires relevant radio spectrum licensees to demonstrate compliance with ICNIRP public exposure guidelines.
UKHSA’s position remains that exposures normally encountered by the public are substantially below these limits and that current guidelines provide appropriate protection.
Its May 2026 guidance also notes the World Health Organization’s position that no adverse health effect has so far been causally linked with exposure to wireless technologies.
That represents the mainstream UK public health position and should be clearly acknowledged.
But there is another point which is sometimes overlooked.
UKHSA itself says that people who remain concerned about possible long-term effects below guideline levels may choose to reduce their exposure, and it provides advice on ways of doing so.
In other words, “below the limit” and “as low as reasonably achievable in your own environment” are not the same objective.
Compliance does not necessarily mean minimum exposure
This distinction is central to the work we carry out at Beneficial Environments.
An EMF survey is not primarily an exercise in asking whether your home breaches ICNIRP limits.
In most homes, it will not.
Instead, the useful questions are:
Where are the strongest exposures?
What is producing them?
How long are occupants exposed?
Can unnecessary exposure be reduced without disrupting normal life?
A Wi-Fi router a few metres from a bedroom may be comfortably below official limits. Moving it further away or switching unnecessary wireless transmissions off overnight may nevertheless reduce exposure considerably.
The same applies to mobile phones beside beds, wireless baby monitors, smart devices, electrical fields from wiring and low-frequency magnetic fields from electrical equipment.
This is why measurement matters.
Blanket fear of technology is not useful. Neither is assuming that because an exposure is compliant with a regulatory ceiling there is no reason ever to reduce it.
What happens next?
The current American consultations could produce several outcomes.
They may reinforce existing standards.
They may identify areas where more research is needed.
They could lead to changes in measurement or device-testing procedures, greater consideration of children or cumulative exposure, or ultimately recommendations for revised exposure guidelines.
It is too early to know.
What is already clear is that electromagnetic exposure remains an active scientific and regulatory subject in 2026.
HHS is asking whether effects can occur below current limits.
The FCC is revisiting questions about children, chronic exposure and the way modern devices are tested.
France is funding new research into mechanisms, health outcomes and real-world exposure.
Against that background, the sensible approach for households is neither panic nor complacency.
It is measurement, understanding and proportionate exposure reduction.
That has always been the basis of our approach at Beneficial Environments: identify the significant sources first, distinguish meaningful exposure from insignificant background levels, and then concentrate mitigation where it can make a genuine difference.
Need to understand the EMF levels in your home?
Beneficial Environments provides professional electromagnetic field surveys and practical advice on reducing unnecessary exposure from radiofrequency radiation, electric fields, magnetic fields and dirty electricity.
Rather than guessing which products you may need, a survey can identify the dominant sources in your property and help determine which changes are likely to produce a worthwhile reduction.