There is no doubt that the Nigerian banking industry is visible in the global sustainable banking radar and this traceable to its embrace of international trends and practices. However, given a number of factors, its uptake of clean technology as a means of attaining environmental sustainability remains challenging. Relying on survey method and content analysis of secondary data this study assessed three clean technology adoption issues – propensity, intensity, and staff awareness among two strategic groups of the banking industry. The findings showed that propensity for adoption and level of staff awareness differ significantly between the international and national groups of banks. But the variation between them in terms of intensity was not significant. One of the policy implications of the findings is that the key regulatory (policy) framework, the Nigerian Sustainable Banking Principles needs to be strengthened in the area of e-waste and intensity of adoption.