In this issue: NIWA has designed, supplied and installed a complex web-enabled automatic control system, comprised of nearly 60 control stations, and software to manage the water distribution across Rangitata South Irrigation (RSI); Technologists, researchers, farmers, regulators and irrigation scheme operators are jointly evolving a water use strategy for Canterbury; Rain and irrigation water can transport fertilizer, farm chemicals, animal waste and pathogens to unknown destinations underground, in various proportions and concentrations.