For certain we are all immersed in very significant LF to ELF magnetic fields cause by our power grids and home distribution via the wiring already. Cell phones and wi-fi are way at the opposite end of the spectrum in the microwave range.
AC fields produced by our electric systems 60Hz here, 50Hz most everywhere else, and phones, wi-fi, and other devices, change polarity with the frequency of the sinusoidal/periodic wave. So it's a vibrational kind of effect on materials that are magnetically active (Magnetic susceptibility).
DC fields, and those from permanent magnets will be static in nature with fixed field polarity and will produce a pulling distortion effect on materials that are magnetically active (Magnetic susceptibility).
Is it any surprise that the government website in question is a piece of shit for the folks that pay to have it? I can't stand those fuckers!