Projective cover and total phosphorus content in thalli of Hypogymnia physodes (L.) Nyl. in the area of operation of the facility for the destruction of phosphorus-containing toxic substances (Kirov region) was studied. Monitoring sites are represented by forest phytocenoses (subzone of the southern taiga) and are located at different distances from the source of pollution (1.2-9.6 km). The total phosphorus content in the thalli of H. physodes during the research period (2010-2019) varied in the range of 409-1532 μg/g dry weight. Based on the cluster analysis by the phosphorus content, two groups of sites are distinguished. The first cluster includes areas with increased accumulation of phosphorus compounds in lichen thalli; they are located near the pollution source in the direction of prevailing winds. In areas belonging to the second cluster, insignificant differences in the phosphorus content in the thalli of H. physodes were revealed. The average value of the total projective cover of hypogymnia in monitoring sites is in the range of 24-41%. Based on a cluster analysis of data on projective cover, 2 clusters are also distinguished. The first cluster includes areas with an increased value of projective cover (more than 30%), they are maximally distant from the source of pollution. The second cluster, which is characterized by lower values of the projective cover, includes areas located near the technogenic object, as well as on the leeward side. A negative correlation between the studied lichen indices was revealed: as we approach the source of pollution, the projective cover decreases and the accumulation of phosphorus compounds increases. This dependence was maximally manifested in 2013-2015. It has been shown that since 2015, the phosphorus level in lichen thalli, regardless of the location of the observation site, has been decreasing. This is due to a decrease in the intake of phosphorus compounds in the environment and the involvement of accumulated phosphorus in the life processes of H. physodes.