Air quality
Air quality in Galveston today
Updated
Moderate (US AQI 58) Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. Model estimate for Sun, Oct 25, 2:00 pm (19:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Galveston, Texas, United States, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 58 Moderate
- PM2.5
- 5.9 µg/m³ 0.4× WHO 24-h guideline
- PM10
- 8.4 µg/m³
- Ozone
- 121 µg/m³
- Dominant pollutant
- ozone sub-index 58
- Best hour today
- 2:00 pm AQI 58
- European AQI
- 61
Air quality in Galveston right now
Right now the modelled US Air Quality Index for Galveston, Texas, United States is 58, which falls in the "Moderate" band (up to 100). Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors.
The index is driven mainly by ozone, whose own sub-index is 58. Ozone usually peaks in the afternoon on sunny days and falls back after sunset.
PM2.5 is 5.9 µg/m³, within the WHO 24-hour guideline of 15 µg/m³; PM10 is 8.4 µg/m³ against a guideline of 45; ozone is 121 µg/m³ (above the WHO 8-hour level of 100); nitrogen dioxide is 1.5 µg/m³ (below the 24-hour guideline of 25).
Also this hour: UV index 5.7, carbon monoxide 132 µg/m³.
NASA FIRMS shows 187 fire hotspots within 300 km in the last day (nearest about 12 km), but particle levels are not elevated enough to point to smoke right now.
Galveston AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 43 around Mon 12:00 pm to 74 around Sun 8:00 pm, from "Good" at best to "Moderate" at worst.
The following day is expected to be cleaner, averaging about 53 against 60 for the next 24 hours.
| Local time (America/Chicago) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Sun 2:00 pm | 58 | Moderate | 5.9 | 8 | 121 |
| Sun 5:00 pm | 66 | Moderate | 7.2 | 10 | 125 |
| Sun 8:00 pm | 74 | Moderate | 6.6 | 9 | 119 |
| Sun 11:00 pm | 72 | Moderate | 7 | 10 | 112 |
| Mon 2:00 am | 63 | Moderate | 7.4 | 10 | 109 |
| Mon 5:00 am | 55 | Moderate | 8 | 11 | 103 |
| Mon 8:00 am | 49 | Good | 9.3 | 13 | 88 |
| Mon 11:00 am | 44 | Good | 11.4 | 17 | 90 |
| Mon 2:00 pm | 46 | Good | 15.5 | 21 | 110 |
| Mon 5:00 pm | 51 | Moderate | 13.9 | 20 | 112 |
| Mon 8:00 pm | 52 | Moderate | 10.2 | 15 | 97 |
| Mon 11:00 pm | 53 | Moderate | 8.6 | 13 | 94 |
| Tue 2:00 am | 53 | Moderate | 9.7 | 14 | 97 |
| Tue 5:00 am | 54 | Moderate | 10.9 | 17 | 96 |
| Tue 8:00 am | 54 | Moderate | 11 | 18 | 93 |
| Tue 11:00 am | 55 | Moderate | 10.8 | 17 | 96 |
| Tue 2:00 pm | 54 | Moderate | 11.8 | 19 | 99 |
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 Galveston today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 2:00 pm (AQI 58, Moderate) and the worst around 8:00 pm (AQI 74). That is a swing of 16 points, so a run or walk around 2:00 pm is noticeably better.
Galveston vs the rest of United States
Across 10 United States cities we track, the average US AQI right now is 81 (Moderate). Galveston at 58 is 23 points cleaner than average.
For context, the median across 269 cities worldwide is 73.
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Galveston, 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
At 58, most people are fine outdoors. If you are unusually sensitive to ozone, keep long or intense workouts to the cleaner hours shown above.
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 Galveston
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), NASA FIRMS.