What is a safe RF level in µW/m²?

Question

What RF power density is considered safe, in µW/m²?

Answer

The FCC's enforceable public limit above 1.5 GHz is 1 mW/cm², which equals 10,000,000 µW/m² — the occupational limit is five times higher — and ICNIRP's public reference level above 2 GHz is the same figure expressed as 10 W/m². Precautionary frameworks sit far lower: building-biology practice grades a sleeping area under 0.1 µW/m² as no anomaly and above 1,000 µW/m² as extreme, and EUROPAEM proposes night-time targets in the same low range. A typical home a few metres from its own Wi-Fi router measures roughly 100–10,000 µW/m² — thousands of times under the regulatory limit and well above the precautionary bands, which is why the two camps can quote the same measurement and disagree completely.

Related records

• FCC general population MPE, 1.5–100 GHz

  1.0 mW/cm² power density averaged over 30 minutes — the band that covers most cellular, Wi-Fi and 5G frequencies in the United States.

  Exposure limits

• ICNIRP 2020 general public reference level, 2–300 GHz

  10 W/m² incident power density averaged over 30 minutes and over the whole body — the reference level that 5G mid-band and Wi-Fi compliance is judged against outside the U.S.

  Exposure limits

• Building Biology SBM-2024 RF band: no anomaly

  Below 0.1 µW/m² peak per RF source in a sleeping area is graded 'no anomaly' — a precautionary target eight orders of magnitude below the FCC limit.

  Exposure limits

• µW/m², mW/m² and mW/cm²

  Three units for the same RF quantity, spanning ten orders of magnitude: 1 mW/cm² = 10 W/m² = 10,000 mW/m² = 10,000,000 µW/m².

  Glossary

Sources

1. fcc-1310 47 CFR § 1.1310 — Radiofrequency radiation exposure limits — U.S. Government Publishing Office (eCFR). regulation, link checked 2026-08-12.
2. icnirp-2020 Guidelines for Limiting Exposure to Electromagnetic Fields (100 kHz to 300 GHz) — International Commission on Non-Ionizing Radiation Protection, 2020. guideline, link checked 2026-08-12.
3. sbm-2024 Building Biology Evaluation Guidelines for Sleeping Areas (SBM-2024) — Institut für Baubiologie + Nachhaltigkeit (IBN), 2024. ngo, link checked 2026-08-12.
4. europaem-2016 EUROPAEM EMF Guideline 2016 for the prevention, diagnosis and treatment of EMF-related health problems — European Academy for Environmental Medicine, 2016. ngo, link checked 2026-08-12.