Quality of drinking water in rural areas: problems of legal environment Volodymyr Yermolenko, Olena Hafurova, Maryna Deineha, Tamara Novak, Alena Temnikova and Erdene Naidansuren E3S Web Conf., 280 (2021) 09022 Published online: 30 June 2021 DOI: 10.1051/e3sconf/202128009022