Reducing greenhouse gas (GHG) emissions involves effort from different sectors of the economy, including the water and sewerage industry. This study estimates the marginal cost of curtailing GHG emissions in the water and sewerage industry using stochastic frontier analysis techniques for a sample of ten English and Welsh water and sewerage companies over the 2010–2019 period. Results illustrated that the average marginal cost of reducing GHG emissions was 0.181 £/Kg CO₂ equivalent. The marginal cost estimated notably differs across companies and over time. Findings further illustrate the impact of water companies' operating characteristics on the marginal cost of reducing carbon emissions.

减少温室气体排放涉及经济各部门的努力，包括水和污水处理行业。这项研究使用随机前沿分析技术对10家英国和威尔士的自来水和污水处理公司在2010-2019年期间的样本中估计了减少自来水和污水处理行业温室气体排放的边际成本。结果表明，减少温室气体排放的平均边际成本为0.181£/ Kg CO ₂当量。估计的边际成本在不同公司之间以及随着时间的流逝而显着不同。调查结果进一步说明了自来水公司的经营特征对减少碳排放的边际成本的影响。