The high scientific standards maintained by Water Supply in their papers owes much to the continuing dedication of the journals' 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 Editor in Chief, Editors and Associate Editors of Water Supply acknowledges with particular gratitude the reviewers who have reviewed papers during the period January 2018–December 2018.
| Nurul Aiin Ab Aziz | Sattar Chavoshi | Konstantinos Gonelas | An Liu | Ljubodrag Savic |
| Aminuddin Ab Ghani | Wei-Hsiang Chen | Rebeca González-Villela | Haixing Liu | Isabel Scherer |
| Maher Abboudi | Baiyang Chen | Brij Gopal | Shuming Liu | Alois Schmalwieser |
| Abdallah Abdelfattah | He Chen | John Greenman | Zhiquan Liu | C. Sezen |
| Maazouzi Abdelhak | I-Chieh Chien | Jan Gregor | Lorena Liuzzo | Mohammed Shafei |
| Hussein Abdel-Shafy | Annatoria Chinyama | Neil Grigg | S L Lo | Peter Shanahan |
| Sayeda Abdo | Pei-Te Chiueh | Maria Gunnarsdottir | D. Loureiro | Himanshu Sharma |
| Kaoru Abe | Kyujng-sook Choi | Xinlei Guo | Jelena Lozo | Yi Shen |
| Amila Abeynayaka | Kangmin Chon | Yıldırım Gürol | Xiangyu Luo | Brad Sherman |
| Hassan Aboelnga | Symeon Christodoulou | Ian Guymer | Xianxin Luo | Baoyou Shi |
| Enas Aboutaleb | Cristiano Christofaro | Herman Hahmoud | Edevar Luvisotto Junior | Ming-Cheng Shih |
| Arash Adib | David Clark | Ivan Halkijevic | Hanyu Ma | Longcang Shu |
| Ilan Adler | Francois Clemens | Alan Hatton | Maritza Macias-Corral | Helena Simão |
| Mansoor Ahammed | Eoghan Clifford | Guenter Hauber-Davidson | Mohamad Reza Madadi | Dai Simazaki |
| Ishfaq Ahmad | Ricardo Cobacho | Katherine Heal | Basant Maheshwari | Antonietta Simone |
| Gamila Ahmed | Luciano Coccagna | Helvi Heinonen-Tanski | Olfa Mahjoub | Gurmeet Singh |
| Jane Aiken | Andrea Cominola | María Hellmers | Anas Makki | Siti Murniningsih Siti Murniningsih |
| Seval Akal Solmaz | Vincent Cooper | Manuel Herrera Fernandez | Stefano Mambretti | Patrick Smeets |
| Hana Al Maskati | ME Corman | Mehrdad Hesampour | Candida Manuel | Charlotte Smith |
| Mohammad Alajlouni | Benito Corona Vasquez | Chia-Chun Ho | Rui Marques | Leszek Sobkowiak |
| Ohidul Alam | Juana Cortés Muñoz | Rita Hochstrat | Beatrice Marti | Maria Do Carmo Sobral |
| María Alarcón Herrera | Joseph Cotruvo | Christiane Hoeller | Alejandra Martín Domínguez | Marcos Solache-Ríos |
| Tamer Al-Assa’d | Sophie Courtois | Roberta Hofman-Caris | Alysson Martins | Hans-Christian Sorge |
| Eleftheria Alexandri | Didia Covas | Yi Hong | Costantino Masciopinto | Joaquim Sousa |
| Mahmoud Al-Hindi | Carmine Covelli | Mark Honti | Catalina Maya | Andrew Spiegel |
| Farhad Alizadeh | Enrico Creaco | Karel Hornak | Ian Mayor-Smith | Michael Stadermann |
| Ufuk Alkan | Jonathan Crockett | Jingming Hou | Larry Mays | Philipp Staufer |
| Stefano Alvisi | Gokhan Cuceloglu | Guy Howard | Md Azlin Md Said | Ming Su |
| Kamel K. Al-Zboon | Susan Cumberland | V. Hrissanthou | Richard Meissner | Jian-Ping Suen |
| Muhammad Amin | Davi Cunha | C Hu | Cor Merks | Chaisri Suksaroj |
| Andreas Andreadakis | Markus Czymzik | Donggen Huang | Gérard Merlin | Ying-Xue SUN |
| Andreas Angelakis | Abdelkrim Dahmen | Jinliang Huang | Elsa Mesquita | Marimuthu Sundaravadivel |
| Manuela Antonelli | J Dalton | Lizhi Huang | Joong-Hyuk Min | Prabhata Swamee |
| Onur Apul | Nguyen Dan | Scott Huling | Gholamreza Mirzavand | Hideyuki Tadokoro |
| Toshiya Aramaki | D. Daniel | Faten Hussein | Steve Mitchell | Fariborz Taghipour |
| Ernesto Arandia | Tina Dasic | Soren Hvilshoj | Michael Möderl | Hao Tang |
| Claudio Arena | Giovanni De Feo | Takanobu Inoue | Abu Bakar Mohamad | Li Tao |
| Canan Armutcu | Mauro De Marchis | Unai Iriarte | S Mohan | Bassam Tawabini |
| Aleksander Astel | Mahmoud Debabeche | Joaquín Izquierdo Sebastián | Laura Monteiro | Johann Tempelhoff |
| Azize Ayol | Ianis Delpla | Anand Jalakam | Sina Moradi | Ilias Tirodimos |
| Ali Azarnivand | Abel Dembélé | Fei-Peng Jao | Mauricio Morel | Mukesh Tiwari |
| Hamidi Abdul Aziz | Katalin Demeter | Sanghyun Jeong | Maruf Mortula | Diogo Trajano Gomes da Silva |
| Kamal Azrague | Julia Derx | Vincent Ji | Simon Moulds | Jelena Trickovic |
| Arno Baeumer | Dhammika. DeSilva | Rui-bao Jia | Ann Mounteer | Stavroula Tsitsifli |
| Juan Baeza | Adey Desta | Wei Jia | Susann Mueller | Tullio Tucciarelli |
| Xiaohui Bai | Luiz Di Bernardo | Jia-Qian Jiang | Charongpun Musikavong | Hsin-hsin Tung |
| Yaohui Bai | Armando Di Nardo | Chen Jianxin | Joshua Myrans | Mustafa Turan |
| Otti Bajsa | Santino Diberardino | Fernando Jiménez-Barredo | GholamReza Nabi Bidhendi | Marina Turini |
| Aminuddin Baki | Mary Ann Dickinson | Shuh-Ren Jing | Mohammad Najafzadeh | Vinay Tyagi |
| M Balakrishnan | Heiko Diestel | Klaus Johannsen | Mohsen Najarchi | Camelia Ucenic |
| Sengottuvelan Balasubramanian | Jorg Dietrich | Edgar Johnson | Tadanobu Nakayama | Taro Urase |
| James Ball | Hong Do | Olof Jonasson | Umamahesh Nanduri | Babak Vaheddoost |
| Brian Barkdoll | Slaven Dobrovic | Franca Jones | Roberto Narbaitz | Walter Van der Meer |
| Andrew Barton | Caetano Dorea | Ron Jong | Ines Navarro | Meine van Dijk |
| Rafael Bastos | Ming Dou | Sebastian Jooste | Marc Neumann | Inge van Driezum |
| Isabelle Baudin | Walter Dragoni | Talis Juhna | Jeffrey Newman | Gerard van Houwelingen |
| John Bavor | Renato Drusiani | Dongwhi Jung | Tze Ling Ng | John Van Leeuwen |
| Irina Bazhin | Huan-Feng Duan | Jose Luis Jurado Baizaval | Bruno Nguyen | Peter van Thienen |
| Chantal Beauchamp | Prashanta Dutta | Harald Kainz | Canh duc Nguyen | Lampros Vasileiadis |
| Mohammad Reza Beheshti | Mawuli Dzakpasu | Herbert Kalibbala | Chris Nokes | Liesbeth Verdickt |
| Silvio Beier | Mauricio Dziedzic | Norashikin Kamal | Vahid Nourani | Kris Villez |
| Miray Bekbölet | Bloodless Dzwairo | Takashi Kameya | Silvia Oliveira | Jan Vreeburg |
| Lyes Bennamoun | Shinya Echigo | Riitta Kamula | Geoff O'Loughlin | Dongbo Wang |
| Hanane Benqlilou | Alper Elçi | Vasilis Kanakoudis | Grace Oluwasanya | Gen-Shuh Wang |
| Luigi Berardi | Mohammad Nabil Bahgat El-Nesr | Jaya Kandasamy | M Ormad | Hongrui Wang |
| Anton Bergant | Samad Emamgholizadeh | Ethem Karadirek | Gideon Oron | Hongyu Wang |
| Cornelius Bezuidenhout | Laszlo Erdei | Bryan Karney | Noraisha Oyama | Kaijun Wang |
| Subhamoy Bhowmick | Ruggero Ermini | Konstantinos Katsifarakis | Diego Paez | Xiangke Wang |
| Avit Bhowmik | Mathias Ernst | Yoshinori Kawase | Declan Page | Yin Wang |
| Erping Bi | Eleazar Escamilla Silva | Virginie Keller | Michele Palermo | Yuhui Wang |
| Yanhong Bian | Saeid Eslamian | Wilawan Khanitchaidecha | Virginie Pallier | Malcolm Watson |
| David Blersch | Vicent Espert | Jeong Kim | Francis Pamminger | Norbert Weissenbacher |
| Fulvio Boano | Enelton Fagnani | Jin Kwan Kim | Feng Pan | Jannis Wenk |
| Silvia Bonetta | Shibiao Fang | Sungwon Kim | Saket Pande | Andreas Winkelbauer |
| Silvena Boteva | Franz Fardin | Amy Kirby | Miguel Angel Pardo Picazo | Wanpen Wirojanagud |
| Hulya Boyacioglu | Sidney Ferreira Filho | Alexander Kirschner | Hyung-Gyu Park | Markus Woegerbauer |
| Tyler Bradley | John Ferry | Gregory Kleinheinz | Jo Parker | Patryk Wójtowicz |
| Kevin Bral | Joachim Fettig | Natalia Klymenko | Abbas Parsaie | Dominique Wolbert |
| Lena Breitenmoser | María Fidalgo de Cortalezzi | Heloise Knapik | David Pearson | June Wolfe |
| John Hagan Brown | Andrew Fisher | Joerg Koelbl | Andrea Perez | Małgorzata Wolska |
| Brian Brownlee | Okan Fistikoglu | Yanlong Kong | Giuseppe Pezzinga | Guangxue Wu |
| H. Bu | Kristian Förster | Akechai Kongprajug | Athit Phetrak | Jianyong Wu |
| Rodrigo Bueno | Marcus Fowler | Roger König | Brett Phillips | chang-lai xiao |
| Michele Burford | Helder Fraga | Plakas Konstantinos | Katarzyna Pietrucha-Urbanik | Rongjing Xie |
| Jonathan Burkhardt | Marco Franchini | Bahadır K. Körbahti | J. Pinho | Meng Xu |
| Aaron Burton | Hannah Franklin | Mark Kowalski | Patrizia Piro | Qiang Xu |
| Elizabeth Butler | Chistina Frick | Daniel Kozelj | Aleksey Pisarenko | Ali Yadollahpour |
| Denis Byamukama | Qiang Fu | Leigh-Anne Krometis | Anand Plappally | Teshome Yami |
| Enrique Cabrera Marcet | Lothar Fuchs | Svetislav Krstić | Jeanine Plummer | baizhong yan |
| Nidia Caetano | Stephan Fuchs | Bimlesh Kumar | Marie-Noëlle Pons | Chou-Ping Yang |
| L.-Y. Cai | Takeshi Fujino | Vikram Kumar | Ioana Popescu | Fei Yang |
| Luigi Campanella | Takahiro Fujioka | Surendra Kumar | Dusan Prodanovic | Jun Yang |
| Alberto Campisano | Taku Fujiwara | Mitchell Laginestra | Changcheng Pu | Zhongping Yang |
| Yongqiang Cao | Catherine Galey | Chin-Hsing Lai | Valeria Puleo | Stavros Yannopoulos |
| Andrea Capodaglio | Panagiota Galiatsatou | Chun-Hsi Lai | John Radcliffe | Jian Ye |
| Irene Carra | Naiyun Gao | Wen-Liang Lai | Faizur Rahman | Hsuan-Hsien Yeh |
| Armando Carravetta | Irene Garousi-Nejad | Abderrahim Lakhouit | Ahmed Rahmani | Baoling Yuan |
| Adrian Cashman | Juan Garrido | Allan Lambert | Upaka Rathnayake | Süleyman Yüce |
| Ignacio Cazcarro | Fabio Garzon | Guenter Langergraber | Luisa Reis | Willem Jan Zaadnoordijk |
| Ferhan Çeçen | Camelia Gavrila | Charles Lee | Paolo Roccaro | Yuanyuan Zha |
| Liyuan Chai | Andrei Georgescu | João Leitão | Mark Rodgers | Feifei Zheng |
| Sudip Chakraborty | Tarik Ghodbani | Cheng Siang Leow | Luis Rodríguez Gómez | Zhenming Zhou |
| Emmanouil Chalkiadakis | Brent Gilpin | M.Victoria Letelier | Dewi Rogers | Dejun Zhu |
| Rolando Chamy | John Glaser | Daphne Lewarne | Srdjan Roncevic | Yuegang Zuo |
| Shu-Chi Chang | Alex Godoy-Faundez | Simeng Li | Raquel Sabogal | Alyaa Zyara |
| David Chang | Sudha Goel | Ping Li | Miquel Salgot | |
| Bambos Charalambous | Fatma Gohary | Warunsak Liamlaem | Maria Sambito | |
| Malay Chaudhuri | Modreck Gomo | H. C. Liang | Gloria Sánchez | |
| Alma Chavez | José Gonçalves | Po-Hsun Lin | Ricardo Santos |