Air Quality (AQI) & Weather in San Sebastian, PR (685)

Q: What is the primary air pollutant in San Sebastian, PR?

The primary air pollutants monitored in San Sebastian include Fine Particulate Matter (PM2.5), Coarse Particulate Matter (PM10), Ground-level Ozone (O3), Carbon Monoxide (CO), Nitrogen Dioxide (NO2), and Sulfur Dioxide (SO2).

Air Quality Index

Temperature

--°C

Real-time Temp

Humidity

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Relative humidity

Wind

-- km/h

Wind Speed

Pollutants

Good

Moderate

USG

Unhealthy

Very Unhealthy

Hazard

Location Map

18.33656, -66.97518

7-Day Forecast

Full Weather for San Sebastian

Past 30 Days — AQI History

Health Advice

Loading recommendations...

Recommendations are indicative. Consult local advisories if you have underlying health concerns.

About Air Quality in San Sebastian, PR

Get real-time updates on air quality in San Sebastian (685), including detailed metrics for key pollutants like PM2.5, PM10, Ozone (O₃), Carbon Monoxide (CO), Nitrogen Dioxide (NO₂), and Sulfur Dioxide (SO₂).

This dashboard presents live Air Quality Index (AQI) calculations alongside a 7-day weather forecast for San Sebastian, PR. Monitor changing pollution levels, relative humidity, wind speeds, and temperature trends to plan safer outdoor activities for your family.

Understanding AQI Ratings

The standard US Air Quality Index (AQI) runs from 0 to 500. Higher values indicate higher levels of air pollution:

0–50 (Good): Air quality is satisfactory; minimal risk.
51–100 (Moderate): Acceptable; slight concern for sensitive people.
101–150 (USG): Sensitive groups may experience health effects.
151–200 (Unhealthy): General public may begin to feel effects.
201–300 (Very Unhealthy): Health alert; increased risk for everyone.

Air Pollution Prevention & Health Tips for San Sebastian

Air quality in San Sebastian, PR fluctuates based on weather patterns, traffic volume, seasonal industrial output, and atmospheric conditions.

Outdoor Mask Protection

During high PM2.5 pollution spikes (AQI > 150), standard surgical masks are insufficient. N95 or KN95 respirators are recommended for effective filtering.

Indoor Air Purifiers

Using True HEPA air purifiers inside homes and offices in San Sebastian helps filter airborne dust, allergens, pollen, and dangerous fine particles.

Environmental & Demographic Profile — San Sebastian, PR (685)

The ZIP code 685 is situated in San Sebastian, located within San Sebastián County, PR. According to US Census estimates, the 685 postal code serves an estimated population of 40,323 residents across an area with a population density of 197.8 people per square mile. Operating under the America/Puerto Rico timezone, local atmospheric telemetry in this area is monitored continuously via nearby regional monitoring stations.

San Sebastian is categorized as a low-density or regional geographic area. Lower industrial activity generally reduces localized vehicular pollution, though ambient air quality can still be impacted by agricultural particulate matter, regional wind currents, or seasonal meteorological activity.

Geographic & Administrative Details

County: San Sebastián County
Coordinates: 18.3366, -66.9752
Timezone: America/Puerto_Rico
Associated Regions: San Sebastián, Isabela, Moca

Frequently Asked Questions About San Sebastian Air Quality

What is the primary air pollutant in San Sebastian, PR?

The primary pollutants continuously monitored in San Sebastian include Fine Particulate Matter (PM2.5), Coarse Particulate Matter (PM10), Ground-level Ozone (O₃), Carbon Monoxide (CO), Nitrogen Dioxide (NO₂), and Sulfur Dioxide (SO₂).

Is it safe to exercise outdoors today in San Sebastian (685)?

Outdoor exercise safety in San Sebastian depends on the real-time Air Quality Index (AQI). An AQI between 0 and 50 is ideal for all outdoor activities. If the index rises above 100, sensitive individuals should reduce prolonged outdoor exertion.

How often is the air quality data updated for ZIP code 685?

Air quality observations and weather metrics on this page are updated in real-time using continuous telemetry from local satellite feeds and ground station monitors.