To implement the environmental monitoring program, it is proposed to use the upper parts of power line towers for the placement of measuring sensors of various kinds. The analysis of possibilities of application of various ways of telemetric information transmission over long distances in the presence of powerful electromagnetic interference is carried out. It was found that the most appropriate in this situation for the transmission of information to use analog fiber-optic communication lines. The use of analog FOCL, which takes into account a number of features we have established the peculiarities of the transmission of analog optical signals, allows you to transmit information at distances greater than 500 km without amplification. According to the results of calculation of the FOCL parameters and experimental studies, the limiting distances for information transmission and the permissible power for the used laser radiation are determined.