How can we ensure effective communication in a citizen science project that addresses a societally controversial topic? This is the central science communication question guiding the CitizenELF project - ELF referring to Extreme Low Frequency radiation, a form of electromagnetic radiation. Our research focuses specifically on magnetic fields generated by high‑voltage power lines. Citizens living near such infrastructure often express concern about the potential long‑term health effects of exposure. Although the Flemish government applies the precautionary principle and aims to limit exposure, there is currently no concrete dataset describing the actual radiation levels in the proximity of these power lines. With this project, we aim to map the real situation without provoking unnecessary anxiety or mistrust.
Commissioned by the Flemish Department of Environment, the CitizenELF study is carried out by Scivil, the Flemish Knowledge and Research Center for Citizen Science, in collaboration with Ghent University and Imec. The project invites residents living within 100 meters of a high‑voltage transmission line to participate. Participants receive accessible information and a plug‑in sensor that collects measurements automatically for at least one week. Apart from filling in a short questionnaire, no further action is required. From a citizen science perspective, the tasks are intentionally designed to be inclusive and easy for everyone.
From a science communication standpoint however, the project presents two key challenges:
Trust and sensitivity.
While no causal relationship has been proven between ELF radiation and health effects, a statistical association has been observed between prolonged exposure near high‑voltage lines and childhood leukemia. This finding underpins the Flemish precautionary policy to avoid long‑term exposure above 0.4 µT, especially around children’s facilities (schools, daycares, residential areas). Public debate on new power lines has been intense in recent years, with campaigns using emotionally charged slogans such as “No against leukemia.” This context illustrates a significant level of public concern and low trust - requiring careful, transparent, and empathetic communication.
Reaching the right audience.
Effective science communication begins with a clearly defined target group. However, our target is based solely on geographical proximity rather than demographic characteristics: anyone living within 100 meters of a power line. This results in a highly diverse and unpredictable audience, making it challenging to tailor messages or identify accessible communication channels. Reaching this dispersed group demands creative and location‑specific strategies.
In our presentation, we will outline our communication strategy with a focus on these two challenges. As the project officially launches in the summer of 2026, we aim to share early insights, experiences, and lessons learned from the first round of citizen measurements. While it will be too early to assess long‑term changes in trust, we hope to offer practical guidance and inspiration to colleagues working on similarly sensitive or complex topics.