The editorial team would like to congratulate the winners of the “Water 2021 Best Paper Awards”, who were chosen by a Selection Committee chaired by the Editor-in-Chief, Dr. Jean-Luc Probst. Following a review process by the Evaluation Committee, six winners were selected. The recipients of the “Water 2021 Best Paper Awards” are as follows:

1^st Place Award: (800 CHF + one free publication)

• Water Quality Indices: Challenges and Application Limits in the Literature (doi: 10.3390/w11020361)
  By Moez Kachroud, Fabienne Trolard, Mohamed Kefi, Sihem Jebari and Guilhem Bourrié
  Link: https://www.mdpi.com/2073-4441/11/2/361

2^nd Place Awards: (500 CHF + one free publication)

• A Brief Review of Random Forests for Water Scientists and Practitioners and Their Recent History in Water Resources (doi: 10.3390/w11050910)
  By Hristos Tyralis, Georgia Papacharalampous and Andreas Langousis
  Link: https://www.mdpi.com/2073-4441/11/5/910

• The Use of Non-Conventional Water Resources as a Means of Adaptation to Drought and Climate Change in Semi-Arid Regions: South-Eastern Spain (doi: 10.3390/w11010093)
  By Álvaro-Francisco Morote, Jorge Olcina and María Hernández
  Link: https://www.mdpi.com/2073-4441/11/1/93

3^rd Place Awards: (300 CHF + one free publication)

• Hydrological Effectiveness of an Extensive Green Roof in Mediterranean Climate (doi: 10.3390/w11071378)
  By Stefania Anna Palermo, Michele Turco, Francesca Principato and Patrizia Piro
  Link: https://www.mdpi.com/2073-4441/11/7/1378

• Forecasting Groundwater Table in a Flood Prone Coastal City with Long Short-term Memory and Recurrent Neural Networks (doi: 10.3390/w11051098)
  By Benjamin D. Bowes, Jeffrey M. Sadler, Mohamed M. Morsy, Madhur Behl and Jonathan L. Goodall
  Link: https://www.mdpi.com/2073-4441/11/5/1098

• Effectiveness of Rainwater Harvesting Systems for Flood Reduction in Residential Urban Areas (doi: 10.3390/w11071389)
  By Gabriele Frenib and Lorena Liuzzo
  Link: https://www.mdpi.com/2073-4441/11/7/1389