Fifty years have passed since the beginning of anti-hail protection (1967) provided in the Central Caucasus areas with the application of crystallizing reagent particles (CRP) of argentum iodide (Agl). The research shows that with the increase in: average annual number of sown hailrisky and hail clouds (Ncls) there is an increase in average annual number of anti-hail rockets (Nahr) supplied with CRP of Agl and leading to environmental pollution; the values of Nahr there is an increase in average annual number of cancer diseases (Ncd) on the protected territories of Andropovskyi and Kochubeevskyi districts. For the objective evaluation of the Nahr effect on the number of skin cancer (Nsc) and respiratory organs (Nro) regression equations were constructed, pair correlation and determination coefficients connecting the values of Nahr with Nsc and Nahr with Nro were calculated. As these coefficient values proved to be more than the critical value given in the Student’s allocation table they are reliable and can serve as a proof of the relation between Nahr and Nsc values and between Nahr and Nsc values of Andropovskyi and Kochubeevskyi districts. The objective method of hail breaking on the protected areas based on estimating optimal application and firing rates in these clouds has been worked out. From 2003 to 2007 the method was being experimentally checked on the stuffs of the protected area of Stavropol militarized service on active hail influencing and other geophysical processes. It was successfully implemented into operational activities of this service. The average physical efficiency of anti-hail protection was estimated at 95,7%. This method can be recommended to different countries when planning and carrying out scientific, experimental and production activities on influencing hailing.