HAIR calculates risk indicators related to the agricultural use of pesticides in EU Member States. HAIR combines databases and models for calculating potential environmental effects expressed by the exposure toxicity ratio (Kruijne et al., 2011). The set of risk indicators currently built in HAIR includes aquatic indicators for algae, daphnia and fish, a groundwater indicator, terrestrial indicators for birds, mammals, earthworms and honey bees, and occupational risk indicators for operators, re-entry workers, bystanders and residents (Kruijne et al., 2011). The intended use of HAIR is to calculate trends in aggregated risk at national scale in support of the evaluation of EU policies, based on compound properties from EFSA and pesticide sales and usage from EUROSTAT databases. HAIR can also be used with more refined usage input data.