The March/April issue of “Hydro” is online. The special coverage “Advances and perspectives of the sanitation framework”, on page 14, shows that, in addition to the success of the large water and sewage auctions held in 2021, the interest of investors in smaller municipalities also draws attention. Machinery and equipment manufacturers have already felt the increase in demand in the production chain. See on page 24, the article ” Removal of hormones and nutrients with aquatic macrophytes”, showing studies related to phytoremediation for hormone removal, an alternative to the complementary step in conventional ETEs, which are not able to remove certain components, such as emerging pollutants. Furthermore, on page 32, the article “Use of ETE sludge biomethane as fuel in a bus fleet”, a work that analyzes the possibility of energy use of biomethane as a fuel source. Anaerobic digesters for biogas production, container for enrichment and biomethane production and supply pumps are dimensioned. This issue also brings the update “Filtration systems”, “Tanks waterproofing products” and “Pumps” buyers’ guides.