California City Rankings

How 155 cities in California compare on combined EMF exposure, cell towers, 5G deployment, and power grid (ELF) exposure. Each list shows up to 10 cities with a published EMF Radar report. See the methodology for how scores are calculated.

California Cities with the Highest EMF Exposure

Cities with the highest combined RF + ELF exposure scores. See the national top 50

Rank City EMF score
1 Downey 79
2 Pico Rivera 79
3 Huntington Park 78
4 Los Angeles 78
5 Montebello 78
6 El Monte 77
7 Monterey Park 77
8 Rosemead 77
9 Santa Clara 77
10 South Gate 77

California Cities with the Lowest EMF Exposure

Cities with the lowest combined RF + ELF exposure scores. See the national top 50

Rank City EMF score
1 Temecula 24
2 Santa Maria 27
3 Murrieta 28
4 Santa Cruz 28
5 San Clemente 29
6 Santa Barbara 29
7 Menifee 30
8 Chico 31
9 Encinitas 32
10 Clovis 36

California Cities with the Most Cell Towers

Cities ranked by the total number of cell towers mapped within city limits. See the national top 50

Rank City Cell towers EMF score
1 San Francisco 2,715 66
2 Los Angeles 2,400 78
3 Berkeley 2,166 70
4 Huntington Park 1,445 78
5 Santa Clara 1,442 77
6 Orange 1,421 76
7 Oakland 1,418 64
8 Petaluma 1,400 48
9 Inglewood 1,379 76
10 Garden Grove 1,362 74

California Cities with the Most 5G Towers

Cities ranked by the number of towers broadcasting 5G NR. See the national top 50

Rank City 5G towers EMF score
1 Santa Clara 503 77
2 San Francisco 450 66
3 San Jose 411 73
4 Sunnyvale 396 71
5 Campbell 388 69
6 Berkeley 347 70
7 Burbank 347 66
8 Santa Ana 330 76
9 Garden Grove 324 74
10 Los Angeles 299 78

California Cities with the Highest Share of 5G Towers

Cities where the largest percentage of cell towers broadcast 5G. See the national top 50

Rank City 5G share EMF score
1 Simi Valley 49% 37
2 Clovis 48% 36
3 Santa Barbara 45% 29
4 Morgan Hill 43% 40
5 Thousand Oaks 43% 46
6 Santa Rosa 42% 42
7 Cupertino 39% 72
8 Sunnyvale 38% 71
9 Folsom 38% 59
10 Campbell 37% 69

California Cities with the Highest Power Grid (ELF) Exposure

Cities ranked by ELF score from transmission lines and substations. See the national top 50

Rank City ELF score EMF score
1 Bellflower 56 76
2 Downey 55 79
3 Paramount 54 74
4 Sacramento 53 75
5 Colton 53 74
6 Pico Rivera 52 79
7 Norwalk 52 75
8 Lakewood 52 74
9 Cerritos 52 73
10 Montebello 51 78
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