The goal for the new improved indicator, PestNaB (Pesticiders NaturBelastning), was to develop a valid indicator reflecting the potential risk for nature due to application of pesticides and based on available data set for Danish conditions. The focus is on risk in relation the nature close to, and directly inside, the agricultural areas so this excludes the risk for contamination of groundwater and the human risk. Elements from existing indicators are combined in a way that can make optimal use of the available data, where the level of complexity is adjusted to fit the conditions of uncertainty. The basic composition of the indicator includes a description of: (1) Where is the nature?; (2) Where takes the spraying place?; (3) What active ingredient is sprayed?; (4) How toxic is the sprayed active ingredients?. Three types of nature elements close to the agricultural fields are defined and described separately: (1) Terrestrial nature; (2) Steams; (3) Ponds and lakes. GIS is used to combine data for agriculture praxis in terms of the crop distribution with distance to the nature elements. Pesticide application was estimated based on crop distribution and the toxicity for a series of toxic end-points covering Fish, daphnia, mammals, arthropods, insects, algae and plants. Totally 18 separated indicators are calculated for each km2 in Denmark and feed into a multi criterion analysis using a partial order method. Like all others pesticide indicators this indicator is relative. So, it is possible to predict one year as more/less risky as an other year or to predict one geographically area are more risky than another area. It is also possible to compare different means of risk reduction in order to find the most effective one, or to find the cheapest way to reduce risk.