Bayamon, Puerto Rico Air Quality
Bayamon County, Puerto Rico (PR)
↓ Improvingover 10 years
How Bayamon, Puerto Rico Air Quality Compares
Bayamon, Puerto Rico's median AQI of 22is 46% better than the national average of 41. Air quality has worsened by 12 AQI points over the past decade. The area rarely experiences unhealthy air quality days. The primary pollutant of concern is Carbon Monoxide.
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 | 22 | 52 | 74 | 193 | 23 | 0 | PM2.5 |
| 2022 | 15 | 33 | 77 | 342 | 16 | 0 | CO |
| 2021 | 10 | 41 | 77 | 320 | 27 | 0 | CO |
| 2020 | 21 | 38 | 69 | 259 | 11 | 0 | CO |
| 2019 | 20 | 53 | 79 | 239 | 39 | 0 | PM2.5 |
| 2018 | 56 | 83 | 172 | 76 | 175 | 13 | PM2.5 |
| 2017 | 60 | 79 | 132 | 46 | 109 | 4 | PM2.5 |
| 2016 | 23 | 53 | 177 | 199 | 66 | 2 | Ozone |
| 2015 | 18 | 50 | 146 | 241 | 25 | 1 | Ozone |
| 2014 | 10 | 22 | 51 | 271 | 1 | 0 | CO |
What This Means for Bayamon County Residents
Bayamon, Puerto Rico has received an Air Quality Grade of A (87/100) based on a decade of monitoring data from the EPA's air quality monitoring program. The current median AQI of 22 falls in the "Good" range.
Encouragingly, air quality here has been improving, with the median AQI dropping by 12 points over the monitoring period. This trend suggests continued investment in emission controls and cleaner energy.
The primary pollutant affecting this area is Carbon Monoxide. Over the past 5 years, this area has averaged 0 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
AQI: 14 · Grade: A
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AQI: 52 · Grade: D
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AQI: 9 · Grade: A
AQI: 25 · Grade: C
Frequently Asked Questions
Bayamon, Puerto Rico has a current median AQI of 22, which falls in the "Good" range. The area has received an Air Quality Grade of A (87/100) based on 10 years of EPA monitoring data.
Air quality in Bayamon, Puerto Rico is improving over the past decade. The median AQI has changed by +12 points from 2014 to 2023.
Bayamon, Puerto Rico averages 0 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 Bayamon, Puerto Rico is Carbon Monoxide. This is the dominant contributor to elevated AQI readings in the Bayamon County area.
Bayamon, Puerto Rico averages 0 unhealthy air days per year. This is relatively low, making it a reasonable choice for asthma sufferers. The primary pollutant is Carbon Monoxide, which can affect respiratory health.
With a median AQI of 22 (Good), outdoor exercise in Bayamon, Puerto Rico is generally safe year-round. Bayamon, Puerto Rico averages 0 days per year when athletes should move workouts indoors.
Explore Air Quality Data
For this entity, the underlying data on this page comes from the EPA Air Quality System (AQS). The breakdown above is the federal record; the paragraphs below add the per-entity context that makes the headline numbers usable for a real decision rather than just a data lookup.
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.