Based on the provided data, let's analyze the air quality for June 12, 2025, in comparison to historical data:

1. Ozone (O3):

   • Daily mean: 100.77 µg/m³
   • Compared to the last 30 days: Higher than the average mean of 70.74 µg/m³.
   • Compared to this season: Higher than the average mean of 67.79 µg/m³.
   • The maximum value of 146.4 µg/m³ is close to the seasonal maximum of 147.6 µg/m³.

2. Nitrogen Dioxide (NO2):

   • Daily mean: 10.41 µg/m³
   • Compared to the last 30 days: Higher than the average mean of 7.06 µg/m³.
   • Compared to this season: Higher than the average mean of 8.25 µg/m³.
   • The maximum value of 23.7 µg/m³ is below the seasonal maximum of 31.9 µg/m³.

3. Fine Particles (PM2.5):

   • Daily mean: 17.03 µg/m³
   • Compared to the last 30 days: Higher than the average mean of 7.28 µg/m³.
   • Compared to this season: Higher than the average mean of 11.48 µg/m³.
   • The maximum value of 24.9 µg/m³ is below the seasonal maximum of 33.8 µg/m³.

4. Particle Number Concentration (CPC):

   • Daily mean: 8945.74 particles/cm³
   • Compared to the last 30 days: Higher than the average mean of 6397.02 particles/cm³.
   • Compared to this season: Higher than the average mean of 6897.0 particles/cm³.
   • The maximum value of 13654.3 particles/cm³ is below the last 30 days maximum of 30377.1 particles/cm³.

5. Elemental Carbon (EC):

   • Daily mean: 0.38 µg/m³
   • Compared to the last 30 days: Higher than the average mean of 0.19 µg/m³.
   • Compared to this season: Higher than the average mean of 0.27 µg/m³.
   • The maximum value of 0.6 µg/m³ is below the last 30 days maximum of 1.0 µg/m³.

6. Global Solar Radiation:

   • Daily mean: 336.13 W/m²
   • Compared to the last 30 days: Higher than the average mean of 226.19 W/m².
   • Compared to this season: Higher than the average mean of 200.05 W/m².
   • The maximum value of 920.0 W/m² matches the seasonal maximum.

7. Sulfur Dioxide (SO2):

   • Daily mean: 0.62 µg/m³
   • Compared to the last 30 days: Slightly higher than the average mean of 0.55 µg/m³.
   • Compared to this season: Slightly lower than the average mean of 0.63 µg/m³.
   • The maximum value of 1.1 µg/m³ is below the last 30 days maximum of 5.0 µg/m³.

8. NOx expressed as NO2 equivalent:

   • Daily mean: 11.49 µg/m³
   • Compared to the last 30 days: Higher than the average mean of 7.97 µg/m³.
   • Compared to this season: Higher than the average mean of 9.22 µg/m³.
   • The maximum value of 30.7 µg/m³ is below the last 30 days maximum of 42.7 µg/m³.

Summary: The air quality on June 12, 2025, showed elevated levels of ozone, nitrogen dioxide, PM2.5, particle number concentration, and elemental carbon compared to both the last 30 days and the current season averages. Solar radiation was also higher than average. While sulfur dioxide levels were slightly elevated compared to the last 30 days, they were slightly lower than the seasonal average. Overall, the air quality on this day was poorer than typical for this time of year, with several pollutants exceeding their respective average concentrations.