The high scientific standards maintained by Journal of Water Supply: Research and Technology - AQUA in its papers owe much to the continuing dedication of the journal's referees, 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 Journal of Water Supply: Research and Technology - AQUA acknowledge with particular gratitude the following referees who have reviewed papers during the period January 2018–December 2018.
| F. Abdelmalek | Baiyang Chen | Vinod Kumar Gupta | Majid Mahmoodabadi | Saroj Sharma |
| Ali Abdullah | Kuan-Chung Chen | Amir Hamzeh Haghiabi | Xuhui Mao | Hung-Yee Shu |
| Mohd Abdullah | Bai-You Cheng | Mansour Haidera | Thangavel Mathimani | Li Shu |
| Salwan Abed | Chel-Ken Chiam | Mooyoung Han | Dena McMartin | Siddhartha Singha |
| Mahyar Aboutalebi | Matteo Chiesa | Rong Hao | Shinichi Minegishi | S Siripattanakul-Ratpukdi |
| Mostafa AbuKhadra | Yung-Chia Chiu | Khondoker Hassan | Dinh Minh | CK Smitha |
| Turkan Ormanci Acar | Pei-Te Chiueh | Hisashi Hayashi | Brijesh Kumar Mishra | Marcos Solache-Rios |
| Ilan Adler | Young Cho | Rochelle Holm | Peyman Najafi Moghadam | Yankun Song |
| Augustine Affam | Shakhawat Chowdhury | Peiying Hong | Laura Monteiro | Carl Spangenberg |
| Mansoor Ahammed | Yi-Hsueh Chuang | Guanghui Hua | Sumrit Mopoung | Shanlei Sun |
| Soroosh Alahdin | Jarosław Chwastowski | Chihpin Huang | Jesus Mora-Rodriguez | C. Suribabu |
| Ramunė Albrektienė | Harun Ciftci | Abid Hussan | Hiroshi Moriwaki | Prabhata Swamee |
| Imran Ali | Slavica Ciric | Giuseppina Lervolino | Gabriel Messias Moura de Faria | Massoud Tabesh |
| Ahmed Hassoon Ali | Luciano Coccagna | Ján Ilavský | Z. V. P. Murthy | Mohammad Mehdi Taghizadeh |
| Mohamad Javad Alizadeh | Didia Covas | Prasad Inamdar | Saravanan Muthupandiyan | Hao Tang |
| Taha Al-Washali | Enrico Creaco | Unai Iriarte-Velasco | Jana Naceradska | Min Tang |
| Gholamreza Andalib | Yoshika Crider | Martín Iribarnegaray | Matteo Nicolini | Yücel Taşdemir |
| Ivar Annus | Matthew Currell | Heinz Jacobs | Xiao-Bao Nie | Stavroula Tsitsifli |
| Ernesto Arandia-Perez | Moustafa Darweesh | Shervin Jamshidi | Ayda Noori | Hsin-hsin Tung |
| Gholamreza Asadollahfardi | Alberto de la Fuente | Vaclav Janda | Katerina Novotna | Taro Urase |
| Vassilis Aschonitis | Yong Deng | Veeriah Jegatheesan | Ola Olapade | Alexis Valenza |
| Alper Baba | Asaad Derbala | Joanna Jez-Walkowiak | Adam Olivieri | C.G.E.M. van Beek |
| Martijn Bakker | Andrea Dietrich | D.C. Jhariya | Duygu Ova | Walter van der Meer |
| Aline Baptista | Lihua Dong | Ren Dong Ji | Parimal Pal | Petra Vasatova |
| Magdalena Baresova | Caetano Dorea | Klaus Johannsen | Marcela Paredes-Laverde | Maria Jesus Villaseñor |
| Brian Barkdoll | Huan-Feng Duan | Santosh Kaini | Donghee Park | Shrutika Wadgaonkar |
| Danka Barlokova | Meral Dukkanci | Konstantinos Kakoudakis | Anburajan Parthiban | David Walker |
| Lisa Barrott | Bruce Dvorak | Vasilis Kanakoudis | Assela Pathirana | Aiqin Wang |
| Rahim Barzegar | Zbyslaw Dymaczewski | Bryan Karney | Kalyan Piratla | Chao Wang |
| Rolf Baur | Ahmed El-Zeiny | Bassam Kassab | Frederick Pontius | Chen Wang |
| Stephen Beck | Miraç Eryiğit | George Kastl | Valeria Puleo | Nong Wang |
| William Becker | Bahman Esfandiar | Yashwant Katpatal | Jin Qian | Zheng Wang |
| Maria Bermudez | Rolando Fabris | Alireza Keramat | Fangshu Qu | Jiri Wanner |
| Prashant Bhave | Hoda Fakour | Mohammad Reza Khaleghi | Mostafizur Rahman | Wannapawn Watsuntorn |
| Omer Bilhan | Luigi Falletti | Dhavu Khumbulani | Marjan Randjelovic | Melissa Wetzig |
| Andrew Boal | Roberto Farina | Petr Klusoň | S. Rangabhashiyam | Małgorzata Wolska |
| Salem Bouri | Owais Farooqi | Ivana Kopecka | William Rauen | Chia-chen Wu |
| Edward Bouwer | David Ferras | Nektarios Kourgialas | Harish Ravishankar | Zheng Wu |
| Cristiana Bragalli | Monika Filipenska | Beata Kowalska | Mostafa Redwan | Shian-chee Wu |
| Ines Breda | Adriano Fiorucci | Steffen Krause | Xiaohua Ren | Yi (Frank) Xiong |
| Isobel Brink | Jinliang Gao | Bohus Kysela | Eldon Rene | Mohammad Khairi Younes |
| Bruno Brunone | Miguel Garcia | George Kyzas | Michele Romano | Jianwei Yu |
| Laura Bulgariu | Ted Gardner | Alvin Lagardien | Ramiro Ruiz-Rosas | Mohammad Ali Zahed |
| Tomas Cajthaml | Rudy Gargano | Markus Lechner | Lacramioara Rusu | Sina Zahedi |
| Guillermo Carbajal-Franco | S Gato-Trinidad | Joao P. Leitao | Marek Ruzicka | A Zainul |
| Nelson Carriço | Jingye Ge | Ondřej Lhotský | Gabriel Sacchi | Sarvin Zaman Zad Ghavidel |
| Lenka Cermakova | Daniel Gerrity | Ke Li | Mahdi Safari | Rahmiana Zein |
| Cem Polat Cetinkaya | Farshid Ghanbari | Peiyue Li | Masaki Sagehashi | Guangming Zeng |
| S. N. Chan | Roghaye Ghasempour | Qinghua Li | Biswajit Saha | Yuhong Zeng |
| Panchangam Sri Chandana | Kebreab Ghebremichael | Heng Liang | Abd Wahid Samsuri | Haihan Zhang |
| Sue-min Chang | Jerome Gilbert | Chin-Jung Lin | A.S. Sanchez | Junzhi Zhang |
| Zdenek Chara | Sudha Goel | Jr-Lin Lin | Phayom Saraphirom | Mengmeng Zhang |
| Nikos Charizopoulos | Fabio Gonçalves | Yi-li Lin | Alois Schmalwieser | |
| Kwok-wing Chau | Joanna Goscianska | Lucija Lipus | N Selvaraju | |
| Saif Ali Chaudhry | Francesco Granata | Wasantha Liyanage | Amir Shabani | |
| Nicolas Cheifetz | Neil Grigg | Parvez Mahbub | Aviram Sharma |