Air quality
Air quality in San Fernando, Central Visayas today
Updated
Good (US AQI 40) Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. Model estimate for Mon, Oct 26, 4:00 am (20:00 UTC).
Live AQI, PM2.5, PM10 and ozone for San Fernando, Central Visayas, Philippines, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 40 Good
- PM2.5
- 5.1 µg/m³ 0.3× WHO 24-h guideline
- PM10
- 5.3 µg/m³
- Ozone
- 68 µg/m³
- Dominant pollutant
- ozone sub-index 40
- Best hour today
- 9:00 am AQI 32
- European AQI
- 24
Air quality in San Fernando, Central Visayas right now
Right now the modelled US Air Quality Index for San Fernando, Central Visayas, Philippines is 40, which falls in the "Good" band (up to 50). Air quality is satisfactory and poses little or no risk; a good time for outdoor activity.
The index is driven mainly by ozone, whose own sub-index is 40. Ozone usually peaks in the afternoon on sunny days and falls back after sunset.
PM2.5 is 5.1 µg/m³, within the WHO 24-hour guideline of 15 µg/m³; PM10 is 5.3 µg/m³ against a guideline of 45; ozone is 68 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 3.9 µg/m³ (below the 24-hour guideline of 25).
Also this hour: carbon monoxide 325 µg/m³.
San Fernando, Central Visayas AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 32 around Mon 9:00 am to 44 around Mon 6:00 pm, staying "Good" throughout.
The following day looks similar, averaging about 35.
| Local time (Asia/Manila) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Mon 4:00 am | 40 | Good | 5.1 | 5 | 68 |
| Mon 7:00 am | 35 | Good | 6.2 | 7 | 63 |
| Mon 10:00 am | 32 | Good | 8.2 | 10 | 84 |
| Mon 1:00 pm | 35 | Good | 9.5 | 11 | 101 |
| Mon 4:00 pm | 42 | Good | 9 | 11 | 93 |
| Mon 7:00 pm | 44 | Good | 7.4 | 9 | 74 |
| Mon 10:00 pm | 39 | Good | 6.1 | 7 | 62 |
| Tue 1:00 am | 39 | Good | 4.4 | 5 | 50 |
| Tue 4:00 am | 38 | Good | 3.3 | 4 | 34 |
| Tue 7:00 am | 37 | Good | 4 | 6 | 38 |
| Tue 10:00 am | 36 | Good | 6.6 | 9 | 65 |
| Tue 1:00 pm | 35 | Good | 8.6 | 12 | 84 |
| Tue 4:00 pm | 34 | Good | 8.6 | 12 | 79 |
| Tue 7:00 pm | 36 | Good | 6.9 | 10 | 58 |
| Tue 10:00 pm | 34 | Good | 5.5 | 7 | 46 |
| Wed 1:00 am | 33 | Good | 3.7 | 5 | 41 |
| Wed 4:00 am | 33 | Good | 2.4 | 3 | 38 |
Every third hour of the CAMS forecast via Open-Meteo. US AQI uses rolling averages (24 h for particles, 8 h for ozone), so it moves more slowly than the hourly concentrations.
Best time to be outside in San Fernando, Central Visayas today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 9:00 am (AQI 32, Good) and the worst around 6:00 pm (AQI 44). That is a swing of 12 points, so a run or walk around 9:00 am is noticeably better.
San Fernando, Central Visayas vs the rest of Philippines
Across 106 Philippines cities we track, the average US AQI right now is 76 (Moderate). San Fernando, Central Visayas at 40 is 36 points cleaner than average.
It ranks 15 of 106 from cleanest to most polluted; the cleanest is Iloilo (21) and the most polluted Victoria, Calabarzon (107).
For context, the median across 3,909 cities worldwide is 56.
Air quality in cities near San Fernando, Central Visayas
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Naga, Central Visayas | 8 km | 40 | Good | 5.1 |
| Talisay | 18 km | 40 | Good | 5.1 |
| Toledo, Central Visayas | 25 km | 31 | Good | 5.3 |
| Cebu City | 26 km | 32 | Good | 5.5 |
| Mandaue City | 30 km | 32 | Good | 5.5 |
| Lapu-Lapu City | 31 km | 32 | Good | 5.5 |
| Mansilingan | 95 km | 34 | Good | 4.2 |
| Bacolod City | 100 km | 34 | Good | 4.2 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of San Fernando, Central Visayas, so the numbers on this page are model estimates. Models capture regional pollution well but can miss very local sources such as a busy road or a nearby fire.
Advice for sensitive groups
With the AQI at 40, there is no need for sensitive groups to change plans. People with asthma should still carry their reliever inhaler as usual.
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Values on this page are modelled by CAMS (Copernicus) and served by Open-Meteo; they are estimates for the area around the city centre, not readings from an official monitor.
Nearby cities
More for San Fernando
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS).