Purpose: to analyze the work of the information and analytical system for monitoring environmental parameters “Emersit-M35”, namely, daily data on flows and water levels from measuring complexes no. 239 and 241, located on the Temernik river, as well as to define the dependence of the flow rate on the water level and to calculate the runoff coefficients based on the data analysis obtained from the measuring complexes of Emersit-M35 environmental monitoring system on the Temernik river for the entire period of its work. Materials and Methods: the daily data on the flow rates and water levels from the measuring complexes no. 239 and 241, located on the Temernik river were analyzed, including graphs for comparing flow rates and water levels, the calculated values of the runoff module for 2018–2020 were presented, and the dependencies Q = f(H) for the entire operation period of the studied measuring complexes were determined. Results: it was found that there was a synchronization of the graphs of the flow rates and water levels on the measuring complex no. 241, and the stability level of the connection Q = f(H) here was more than 80 %, while there was no connection Q = f(H) on the measuring complex no. 239. It is noted that the reason for the absence of this connection is the location of the mentioned measuring complex which is subjected to the influence of the Don river. Conclusions: despite the revealed fact, the studies performed indicate the possibility of using the data obtained from the measuring complexes for the study and analysis of flow rates and water levels.