Since Tacna is a hyper-arid region, greywater is a potential alternative water source. This study aimed to quantify and characterize greywater in a university building with 732 students, as well as assess their perception of greywater reuse. Water meters were used to calculate greywater quantity. To assess untreated greywater quality, physical–chemical and microbiological parameters were analyzed. Questionnaires were used to measure students’ acceptance regarding greywater reuse using a Likert scale. The greywater quantity recorded in this study was 426.85 L/d, which is less than reported in previous global research. The greywater quality showed relatively low values regarding physical–chemical parameters; however, microbial contamination was higher compared to international permissible limits for wastewater reuse. Furthermore, it was found that the generated greywater has little biodegradability (0.38). Students disclosed a lower acceptance of reusing untreated greywater compared to a 77.05% acceptance of reusing treated greywater for green areas. According to the greywater characterization, biological treatment will not be enough to ensure environmental protection and user health; thus, physical–chemical treatment will also be needed. The produced greywater quantities would generate a 12.67% water saving if used for toilet flushing. The greywater volume fulfills the whole demand for watering green areas or green roofs. Students would assent to the reuse of treated greywater.

La pandemia COVID-19 genera preocupación en todo el mundo, desde que el 30 de enero se declaró como emergencia de salud mundial (WHO), lo cual trajo consigo el cambio en el estilo de vida de la población, cierre de sistemas de transporte, paralización de actividades económicas, reduciendo las emisiones de contaminantes al ambiente, causando la mejora de la calidad del aire en muchas ciudades a nivel mundial. Hasta el momento, se han publicado varios estudios de revisión enfocados en los impactos ambientales por COVID-19, sin embargo, ninguno se enfoca específicamente en la contaminación del aire. Por lo cual, el objetivo principal fue presentar una revisión basada en un análisis integral de los estudios publicados abordando implicancias teóricas usadas dentro de los estudios. Se analizaron 68 estudios, los cuales se publicaron en 17 revistas hasta agosto del 2020. Además, se abordan posibles futuras investigaciones en relación al tema. Finalmente se exponen las conclusiones de la presente revisión.