attained by mounting the antenna atop a tall building. This produces high EMF levels in nearby
buildings (Table 10.3) (12). When radio and TV antennas are grouped, they produce relatively intense
EMF levels over broad areas. Mount Wilson, California, for example, has 27 radio and TV antennas
serving the Los Angeles area (Fig. 10.2). This produces EMFs of 720-1200 µW/cm2 in the backyard of
the post office on Mount Wilson, and 120-840 µW/cm2 inside the post office (6). The Sentinel Heights
area south of Syracuse, New York, contains about a dozen transmitters and they result in essentially
ambient levels of about 1 µW/cm2 throughout an area of several square miles (7).
Table 10.2. POWER DENSITY AT VARIOUS DISTANCES FROM A 50,000 WATT AM RADIO
STATION
Table 10.3. EMF IN TYPlCAL TALL BUlLDlNGS
ELECTROMAGNETISM & LIFE - 135