The high scientific standards maintained by Water Policy in its papers owe much to the continuing dedication of the journal's reviewers, who give freely of their time and expertise. IWA Publishing is pleased to pay tribute to this contribution by recognizing those who have participated in the review process. Thus, the Editors of Water Policy acknowledge with particular gratitude the following reviewers who have reviewed papers during the period January 2020–December 2020.
| Amitangshu Acharya | Hugo Consciência Silvestre | Monowar Hussain | Maria Molinos Senante | Francisco Silva Pinto |
| Marieke Adank | Lin Crase | Helen Ingram | Francois Molle | Pedro Simoes |
| Ismael Aguilar-Barajas | James Creighton | Shaofeng Jia | Mario Monteiro | Nandita Singh |
| Sk. Akhtar Ahmad | Tomas Cuesta | MinFei Jian | Saeed Morid | MVK Sivamohan |
| Shamseddin Ahmed | Xiaoping Dai | Yong Jiang | Peter Morison | Charalampos Skoulikaris |
| Guy Alaerts | Purnamita Dasgupta | Juliang Jin | Alvaro-Francisco Morote | Laurence Smith |
| Bhuiyan Alam | Matthew Deitch | Marko Kallio | Pablo José Moya Fernández | M. Spiliotis |
| Angelos Alamanos | Jerome Delli Priscoli | Murali Kallur | Chandrakanth Mysore | Eugene Stakhiv |
| Mansoor Ali | R S Deshpande | Jonghun Kam | Ramakrishna Nallathiga | Georgios Sylaios |
| Lal Almas | Dwarika Dhungel | Vasilis Kanakoudis | Umamahesh Nanduri | Geoffrey Syme |
| Bernard Amadei | KV Dinesh | Tapio Katko | A. Narayanamoorthy | Pierre Teniere Buchot |
| Upali Amarasinghe | Saranga Diyabalanage | David Katz | Daniel Narzetti | Cheh Shyh Ting |
| Hussein Amery | Gabriele Dono | David Keiser | Willian Narzetti | Marco Torres-Vera |
| Jayanath Ananda | Gabriel Eckstein | Michael Klien | Neda Nazemi | Cecilia Tortajada |
| William Andreen | Kwame Emmanuel | A Suresh Kurupu | Susana Neto | Konstantinos Tsagarakis |
| Panagiotis Angelidis | Anita Etale | Laurent Lambert | Kai Siang Oh | Georgios Archimidis Tsalidis |
| Awais Anwar | Thalita Fagundes | Henrik Larsen | Rodrigo Oliveira | Narendra Tyagi |
| Eduardo Araral | Eran Feitelson | Niharika Lata | Pat O'Neil | Vasilios Tzanakakis |
| Ann Arnold | David Feldman | Doron Lavee | Ricardo Oyarzun | Parmeshwar Udmale |
| Sedat Ayanoglu | Mario Fernandez | Christina Leb | Julie Padowski | Mohammad Valipour |
| Fayez Azizi | Diogo Ferreira | Nelly Leblond | Mariya Pak | Elena Vallino |
| Chandra Bahinipati | Rui Fragoso | Kees Leendertse | Rajiv Pandey | Caroline van den Berg |
| Claudia Baldwin | Mario Franca | Ti Le-Huu | Vishnu Pandey | Francine van den Brandeler |
| Somnath Bandyopadhyay | Jean Fried | Mingliang LI | Chetan Pandit | Tom van der Voorn |
| Alexandro Barbosa | Qiang Fu | Wouter Lincklaen Arriëns | Jeeban Panthi | Pieter Van der Zaag |
| Bernard Barraque | Hamza Gabriel | Yanli Liu | Daeryong Park | James VanDerslice |
| Anamika Barua | Alceu Galvão Junior | Juan Lopez | Helga Pereira | Niranjan Vedantam |
| Nitin Bassi | Jacques Ganoulis | Erik Lundin | Jeanne Perrier | Marcelo Villena |
| Carl J. Bauer | Dustin Garrick | Muhammad Luqman | Kenneth M. Persson | Ratna Reddy Vippala |
| Rebecca Bearden | Prakash Gaudel | Aikaterini Lyra | Gisela Pires do Rio | P Viswanathan |
| Jorge Bielsa | Sanchari Ghosh | Jianqin Ma | Mary Pitts | Jeroen Vos |
| William Blomquist | Jeremy Gibberd | Ines Machete | Gheorghe Ponta | Fuqiang Wang |
| Dubravka Bojic | Konstantinos Gkillas | Nick Magliocca | Ajay Pradhan | Hongrui Wang |
| Ilke Borowski - Maaser | Isha Goel | Sushanta Mahapatra | Anjal Prakash | Zhaoli Wang |
| Krzysztof Boryczko | Fabio Goncalves | Rosalind Malcolm | Anthony Priestley | Zhinong Wang |
| Sami Bouarfa | Fabio Gonçalves | Dinesh Manhachery | Naser Qadous | Jeroen Warner |
| Gabrielle Bouleau | David Gorelick | Joe Manous | Xuning Qiao | Kai Wegerich |
| David Brooks | Neil S. Grigg | Bartłomiej Marona | Mostafa Rahimnejad | Uta Wehn |
| Jo Burgess | Javier Guerrero | Rui Marques | Walter Rast | Wei Wei |
| Mokhtar Bzioui | Joana Guerrin | Madhu Mathi | Peter Ravenscroft | Sarah Wheeler |
| Jeff Camkin | Joseph Gutenson | Owen Mcintrye | Iskra Alejandra Rojo Negrete | Dale Whittington |
| Cristina Campos-Alba | Greg Guthrie | Jennifer McKay | Meera Sahasranaman | Kevin Winter |
| Jianting Cao | Efrat Hadas | Matthew McKinney | Rosario Sanchez | Stefanos Xenarios |
| Bruno Carvalho | Tarik Hartani | Yvonilde D. P. Medeiros | Gopal Sarangi | Hira Yadav |
| Tiago Cetrulo | Sedky Hassan | Sharon Medgal | A. Scardigno | Seung-Hoon Yoo |
| Subhash Chand | Gonzalo Hatch | Talatha Meegastenna | Susanne Schmeier | Gene, Jiing-Yun You |
| Dan Chen | Robert Hearne | Isabela Meline | Jeremy Schmidt | Slim Zekri |
| Il-Moon Chung | Leon Hermans | Telma Maria Menicucci | K Seetharam | Demetrio Zema |
| Zoran Ciric | Manuel Herrera | Broder Merkel | Naser Shabakhti | Liangshi Zhao |
| Jeanne Clarke | Colin Herron | Gary Merkley | Muhammad Shahid | Qiting Zhao |
| Serena Cocciolo | Jaime Hoogesteger | Maria Milanes-Murcia | Noor Shaida | Zhongnan Zuo |
| Nina Collins | Bruce Hooper | Karan Misquitta | Ira Sharkansky |