Derived from the EMF radiation threshold developed by the International Commission on Non-Ionizing Radiation Protection (ICNIRP), the Bhutan InfoComm and Media Authority (Authority) has also standardized the threshold level for EMF radiation exposure as shown in the table 1 below.
Table: Reference levels for electric and magnetic fields for occupational and general public exposure in Bhutan
|
Frequency Range |
Electric field-strength (V/m) |
|
|
General Public |
Occupational |
|
|
1-25 Hz |
1000 |
2000 |
|
0.025- 0.82 KHz |
250/(10*f (kHz)) |
500/(10*f (kHz)) |
|
0.82 -3 KHz |
250/(10*f (kHz)) |
61 |
|
3-1,000 KHz |
8.7 |
61 |
|
1-10 MHz |
87/ (10*f 1/2 (MHz)) |
610/ (10*f (MHz)) |
|
10-400 MHz |
2.8 |
6.1 |
|
400-2,000 MHz |
(1.375f 1/2(MHz))/10 |
(3f 1/2 (MHz))/10 |
|
2-300 GHz |
6.1 |
13.7 |
Since July 2018, the Authority has started to monitor and measure the EMF radiation level of telecommunications Base Transceiver Stations (towers) in the country and has certified EMF compliance to 227 towers in the country mainly falling in Urban areas and satellite towns of following Dzongkhags:
-
Thimphu
-
Chukha
-
Paro
-
Punakha
-
Wangdue
-
Sarpang
-
Samtse
-
Gasa
-
Tsirang
-
Dagana
The Authority will continue to monitor and measure all the remaining mobile towers in the country and will be issued with the certificate of EMF threshold compliance. The list of towers with location certified are provided in the link here (BTS Certified List)