Air quality
Air quality in Novo Hamburgo today
Updated
Good (US AQI 26) Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. Model estimate for Sun, Oct 25, 5:00 pm (20:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Novo Hamburgo, Rio Grande do Sul, Brazil, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 26 Good
- PM2.5
- 5.1 µg/m³ 0.3× WHO 24-h guideline
- PM10
- 6.3 µg/m³
- Ozone
- 54 µg/m³
- Dominant pollutant
- PM2.5 sub-index 26
- Best hour today
- 5:00 pm AQI 26
- European AQI
- 20
Air quality in Novo Hamburgo right now
Right now the modelled US Air Quality Index for Novo Hamburgo, Rio Grande do Sul, Brazil is 26, 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 PM2.5, whose own sub-index is 26. Fine and coarse particles come from traffic, heating, industry, dust and smoke; they build up on calm nights and clear when wind or rain arrives.
PM2.5 is 5.1 µg/m³, within the WHO 24-hour guideline of 15 µg/m³; PM10 is 6.3 µg/m³ against a guideline of 45; ozone is 54 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 3.1 µg/m³ (below the 24-hour guideline of 25).
Also this hour: UV index 0.6, carbon monoxide 112 µg/m³.
Novo Hamburgo AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 26 around Sun 5:00 pm to 28 around Sun 9:00 pm, staying "Good" throughout.
The following day is expected to be worse, averaging about 40 against 27 for the next 24 hours.
| Local time (America/Sao_Paulo) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Sun 5:00 pm | 26 | Good | 5.1 | 6 | 54 |
| Sun 8:00 pm | 27 | Good | 6.5 | 8 | 43 |
| Sun 11:00 pm | 28 | Good | 4.9 | 6 | 40 |
| Mon 2:00 am | 27 | Good | 5.1 | 7 | 40 |
| Mon 5:00 am | 27 | Good | 5.1 | 7 | 35 |
| Mon 8:00 am | 28 | Good | 4 | 6 | 39 |
| Mon 11:00 am | 28 | Good | 4.3 | 6 | 54 |
| Mon 2:00 pm | 27 | Good | 6.1 | 8 | 70 |
| Mon 5:00 pm | 28 | Good | 6.8 | 9 | 65 |
| Mon 8:00 pm | 30 | Good | 8.8 | 12 | 39 |
| Mon 11:00 pm | 32 | Good | 9.1 | 11 | 24 |
| Tue 2:00 am | 35 | Good | 11.3 | 14 | 19 |
| Tue 5:00 am | 40 | Good | 12.4 | 14 | 12 |
| Tue 8:00 am | 45 | Good | 9.5 | 11 | 42 |
| Tue 11:00 am | 49 | Good | 9.6 | 12 | 76 |
| Tue 2:00 pm | 51 | Moderate | 9.9 | 13 | 83 |
| Tue 5:00 pm | 52 | Moderate | 8.5 | 12 | 60 |
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 Novo Hamburgo today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 5:00 pm (AQI 26, Good) and the worst around 9:00 pm (AQI 28). The difference across the day is small, so timing matters little.
Novo Hamburgo vs the rest of Brazil
Across 171 Brazil cities we track, the average US AQI right now is 55 (Moderate). Novo Hamburgo at 26 is 29 points cleaner than average.
For context, the median across 3,909 cities worldwide is 56.
Air quality in cities near Novo Hamburgo
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Canoas | 27 km | 29 | Good | 5 |
| Montenegro | 32 km | 26 | Good | 4.6 |
| Porto Alegre | 41 km | 29 | Good | 5 |
| Caxias do Sul | 57 km | 24 | Good | 5 |
| Orleans, Santa Catarina | 231 km | 32 | Good | 4.1 |
| São José, Santa Catarina | 251 km | 32 | Good | 4.1 |
| Santa Maria | 259 km | 27 | Good | 3.8 |
| Pelotas | 260 km | 27 | Good | 3.6 |
Model vs measured
The nearest measured PM2.5 reading is 1.7 µg/m³ from Sensor.Community (median of 9 sensors), centred about 7 km from the city centre. That is 3.4 µg/m³ below the model estimate of 5.1 µg/m³. Low-cost sensors can read high in humid air; reference monitors are more accurate but sparser.
Advice for sensitive groups
With the AQI at 26, 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 Novo Hamburgo
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), Sensor.Community.