RT info:eu-repo/semantics/article T1 Evaluating carbon performance in the water industry: A longitudinal analysis of England and Wales A1 Maziotis, Alexandros A1 Sala Garrido, Ramón A1 Mocholí Arce, Manuel A1 Molinos Senante, María K1 Recursos hídricos K1 Cambio climático K1 Economía ambiental K1 Gestión industrial K1 Cambio en la productividad del carbono K1 Eficiencia del carbono K1 Emisiones de gases de efecto invernadero K1 Análisis estocástico no paramétrico K1 Variables medioambientales K1 Servicios de agua K1 3308 Ingeniería y Tecnología del Medio Ambiente AB The transition to a zero-carbon water industry presents significant challenges for water companies and regulators. This study conducts both static and longitudinal assessments of carbon performance of water companies in England and Wales from 2008 to 2020. Carbon efficiency (CE) and carbon productivity (CP) metrics were estimated using the stochastic semi non-parametric envelopment of data method, which addresses the limitations of traditional parametric and non-parametric techniques. The average CE in 2020 was 0.628, indicating a 37.2% potential reduction in carbon emissions can be achieved by water companies. Despite regulatory efforts, the dynamic assessment shows negligible improvement in carbon performance, with average CP index value of 1.0009. The lack of technological innovation is identified as a key barrier, as technical change contributed negatively (0.9929) to CP, while efficiency change was positive (1.0091). The results highlight the critical role of raw water quality in achieving net-zero GHG emissions. Some strategies to accelerate the decarbonization of the water industry include prioritizing raw water protection, incentivizing technological advancements, and fostering knowledge sharing among companies. SN 2590-1230 YR 2024 FD 2024 LK https://uvadoc.uva.es/handle/10324/82707 UL https://uvadoc.uva.es/handle/10324/82707 LA eng NO Results in Engineering, 24, 103580 NO Producción Científica DS UVaDOC RD 29-mar-2026