Caguas, Puerto Rico Air Quality
Caguas County, Puerto Rico (PR)
↓ Improvingover 8 years
How Caguas, Puerto Rico Air Quality Compares
Caguas, Puerto Rico's median AQI of 6is 85% better than the national average of 41. Air quality has improved by 19 AQI points over the past decade. The area averages 1 unhealthy air days per year. The primary pollutant of concern is Nitrogen Dioxide.
10-Year AQI Trend
The solid line shows the median AQI each year. The dashed line shows the 90th percentile (worst 10% of days). This area has seen measurable air quality improvement over the decade.
Air Quality Day Breakdown
Number of days per year in each EPA AQI category. Green = Good (AQI 0-50), Yellow = Moderate (51-100), Orange = Unhealthy for Sensitive Groups (101-150), Red = Unhealthy or worse (151+).
Year-by-Year Data
| Year | Median AQI | 90th Pct | Max AQI | Good Days | Moderate | Unhealthy+ | Pollutant |
|---|---|---|---|---|---|---|---|
| 2023 | 6 | 34 | 105 | 242 | 13 | 1 | CO |
| 2022 | 9 | 32 | 76 | 291 | 16 | 0 | NO2 |
| 2021 | 14 | 48 | 75 | 180 | 17 | 0 | CO |
| 2020 | 10 | 27 | 72 | 306 | 12 | 0 | CO |
| 2019 | 10 | 47 | 114 | 322 | 28 | 4 | NO2 |
| 2018 | 9 | 23 | 54 | 199 | 2 | 0 | CO |
| 2017 | 24 | 47 | 101 | 209 | 16 | 1 | NO2 |
| 2016 | 25 | 52 | 112 | 9 | 1 | 1 | NO2 |
What This Means for Caguas County Residents
Caguas, Puerto Rico has received an Air Quality Grade of A (97/100) based on a decade of monitoring data from the EPA's air quality monitoring program. The current median AQI of 6 falls in the "Good" range.
Encouragingly, air quality here has been improving, with the median AQI dropping by 19 points over the monitoring period. This trend suggests continued investment in emission controls and cleaner energy.
The primary pollutant affecting this area is Nitrogen Dioxide. Over the past 5 years, this area has averaged 1 unhealthy air quality days per year, days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity. The American Lung Association's State of the Air report provides additional context on long-term health risks from air pollution exposure.
Related Cities in Puerto Rico
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Frequently Asked Questions
Caguas, Puerto Rico has a current median AQI of 6, which falls in the "Good" range. The area has received an Air Quality Grade of A (97/100) based on 10 years of EPA monitoring data.
Air quality in Caguas, Puerto Rico is improving over the past decade. The median AQI has changed by -19 points from 2016 to 2023.
Caguas, Puerto Rico averages 1 unhealthy air quality days per year over the past 5 years. On these days, sensitive groups including children, the elderly, and those with respiratory conditions should limit outdoor activity.
The primary pollutant affecting Caguas, Puerto Rico is Nitrogen Dioxide. This is the dominant contributor to elevated AQI readings in the Caguas County area.
Caguas, Puerto Rico averages 1 unhealthy air days per year. This is relatively low, making it a reasonable choice for asthma sufferers. The primary pollutant is Nitrogen Dioxide, which can affect respiratory health.
With a median AQI of 6 (Good), outdoor exercise in Caguas, Puerto Rico is generally safe year-round. Caguas, Puerto Rico averages 1 days per year when athletes should move workouts indoors.
Explore Air Quality Data
this entity is one of the data points covered by this site’s U.S. air quality and pollution monitoring dataset. The detail above comes directly from the EPA Air Quality System (AQS); the context that follows situates the headline numbers against the broader distribution across U.S. counties and states.
Every number on this page links back to the EPA Air Quality System (AQS); the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for this entity is typically a peer within U.S. counties and states with similar size, similar exposure, or similar geography — not the national-level summary alone.