Tkachenko, N.N., Косинова, И.И., Belozerov, D.A., Budarina, V.A. and Lisetskii, F.N. 2022. Spatial and temporal analysis of nitrate content in the groundwater of the Zadonsk-Optukhovian aquifer carbonate complex of the right bank of the Lipetsk industrial district between 2001 and 2019. Proceedings of Voronezh State University. Series: Geology. 4 (Dec. 2022), 94-107. DOI:https://doi.org/10.17308/geology/1609-0691/2022/4/94-107.