Rigorous peer-reviews are the basis of high-quality academic publishing. Thanks to the great efforts of our reviewers, Pollutants was able to maintain its standards for the high quality of its published papers. Thanks to the contribution of our reviewers, in 2021, the median time to first decision was 35 days and the median time to publication was 63 days. The editors would like to extend their gratitude and recognition to the following reviewers for their precious time and dedication, regardless of whether the papers they reviewed were finally published:
| Ahmed Eid | Marinela Inta |
| Ahmed Saud Abdulhameed | Martina Grifoni |
| Anatolii Kucher | Massimo Trotta |
| Anna Budka | Mats Leifels |
| Antonio Satriani | Mauro Marini |
| Boubié Guel | Mohammad Shahid |
| Brett Singer | Mostafa Redwan |
| Chen Xu | Mouheb Chebbi |
| Chen-Yi Sun | Murthy Chavali |
| Concetta Pironti | Nur Hashimah Alias |
| Dario Savoca | Obdulia Monteserín-Abella |
| Dawn Ford | Omid Aminoroayaie Yamini |
| Debojyoti Moulick | Orhan Baytar |
| Deepika Malhotra | Osmel La-Llave-Leon |
| Dmitry Vlasov | Pierre Herckes |
| Douglas Collins | Pierre-Yves Pascal |
| Efthimios Zervas | Prateek M. Shrestha |
| Elena Koumaki | Raimundo Jiménez Ballesta |
| Elena Matei | Rajender Gupta |
| Elsayed Haggag | Ramona Zgavarogea |
| Eun-Hee Koh | Rui Hou |
| Flávio Manoel Rodrigues Da Silva-Júnior | Ruilian Zhang |
| Francesco Saliu | Santiago Mejía-Dugand |
| Ilaria Guagliardi | Sergey Vinokurov |
| Joanna Jaskula | Sergio Santana-Viera |
| José Herrera-Melián | Shaojie Song |
| Joseph Colosi | Stuart Batterman |
| Junjie Zhang | Taghi Miri |
| Luca Burratti | Tanvir Khan |
| Luís Pinho | Valérie Simon |
| Manuel Arias Ballesteros | Xuechao Gao |
| Margarita Bakaeva | Xueyang Zhang |
| Maria Giaoutzi | Ylenia Miele |
| Maria Ricciardi | Zineb Faiz |
| Maria Toscanesi | Zongbo Shi |
| Marina Lasagni |
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