Oxides of nitrogen, ozone and solar UV radiation were measured at two New Zealand sites, four months at Mt. John near Lake Tekapo, and one month at the New Zealand Department of scientific and Industrial Research, Physics and Engineering Laboratory Atmospheric Station (PELAS) near Lauder. The former site proved ideal for clean-air measurements. Ozone concentration of ~20-25 ppb, with little diurnal variation were accompanied by total nitrogen oxide (NOy) levels frequently less than 150 ppt (parts in 1012 by volume). The noon N0 and N02 data were well correlated with a slope comparable to model values. Gaseous HN03 was observed to be significantly above the noise level (~15 ppt) for only twenty-seven four-hour averages. For these a median of 43 ppt was obtained with a median ([NOy>-[HNO3>)/[HNO3> ratio of 7.5, not comparable with model values of around 1.1. This low HN03 may arise from the fact that the Mt. John site is downwind of a mountain range which experiences significant upwind precipitation. At the PELAS site, strong diurnal variation of ozone and much larger NOy concentrations were observed. The difference is apparently caused by local sources of nitrogen oxides and the local meteorology at the fertile valley PELAS site.