The magazine and web portal Tecnoaqua and the Microplastics Working Group of Commission II of the Spanish Association of Water Supply and Sanitation (AEAS) organized the 2nd Technical Conference on the Microplastics: emerging concern in the waters; Incidence, evaluation of its potential effects, analysis and determination, and elimination. TecnATox Microplastic group attended this conference that took place in Valencia, within the framework of the Water Digitization and Decarbonization Fair (Efiaqua 2022), on October 4, 2022. Prof. Jordi Sierra gave an excellent presentation and pointed out the problem of microplastics in the sludge lines- its levels, environmental effects and prevention.