Environmental policies purposefully encourage environmental protection by redirecting human decision-making and activities. Achieving the right human responses to environmental policy is therefore critically important. This paper discusses the regulatory framework and pastoral farmers’ adaptation to a new regulation, consisting of rules, designed to protect the pristine waters of Lake Taupo from land based non-point source nitrogen emissions. The lake is an internationally recognised treasure and New Zealand icon, however, its water quality has been deteriorating over decades because of rising nitrogen levels, 37% of which comes from pastoral farming activities in the catchment. The paper discusses agricultural extension in the context of emotional, perceptual and behavioural change.Key words: farmer adaptation, policy impact, water quality, farming practices, extensio
