Oxidant data collection in OECD-EUROPE 1985-87 (OXIDATE). Report on ozone, nitrogen dioxide and peroxyacetyl nitrate, October 1986-March 1987, April-September 1987 and October-December 1987.

The report summarizes hourly data from 36 regional measurement stations in 11 countries. Ozone data is given for 33 stations. nitrogen dioxide data for 12 stations and PAN data for three stations. Extreme values, monthly mean concentrations. frequency distributions, diurnal concen- tration variations and back trajectory sector distributions are given together with a brief discussion of oxidant episodes.