art_9__para_3

3. For zones where the level of pollutants exceeds the relevant assessment threshold specified in Annex II, but not the respective limit values, target values and critical levels specified in Annex I, the minimum number of sampling points for fixed measurements may be reduced by up to 50 %, in accordance with Points A and C of Annex III, provided that the following conditions are met: indicative measurements or modelling applications provide sufficient information for the assessment of air quality with regard to limit values, target values, critical levels, alert thresholds and information thresholds, as well as adequate information for the public, in addition to the information provided by the sampling points for fixed measurements; the number of sampling points to be installed and the spatial resolution of indicative measurements and modelling applications are sufficient for the concentration of the relevant pollutant to be established in accordance with the data quality objectives specified in Points A and B of Annex V and enable assessment results to meet the requirements set out in Point E of Annex V; the number of indicative measurements, if used to meet the requirements of this paragraph, is at least the same as the number of fixed measurements that are being replaced and the indicative measurements are evenly distributed over the calendar year; for ozone, nitrogen dioxide is measured at all remaining sampling points measuring ozone except at rural background locations for ozone assessment as referred to in Point B of Annex IV.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-16 · Text as adopted (Official Journal); later amendments are not incorporated in this text.