EnviroNearby

Martin County, Florida air quality history

Daily Air Quality Index summaries from EPA monitors in Martin, Florida, 1996–2025.

79%
Good days in 2025
40
Median daily AQI, 2025
0
Days above 100 in 2025
365
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Martin, Florida on 365 days. 290 of those days (79%) were in the Good range, and the median daily AQI was 40. That median is about the same as the typical monitored county in Florida (median 41 across 38 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 198 days. Across the years with fuller monitoring, the share of Good days rose: an average of 61% in 2010–2012 versus 81% in 2023–2025.

Years with fewer than 120 monitored days (1996, 1997, 1998) are shown in the table but left out of comparisons and trend statements.

How the days broke down each year

Each bar is one year. The colored segments show the share of monitored days that fell in each AQI category.

Share of monitored days in each AQI category, by year0%25%50%75%100%1996: Good 29 of 30 days1996: Moderate 1 of 30 days19961997: Good 61 of 61 days1998: Good 6 of 6 days19982010: Good 123 of 204 days2010: Moderate 81 of 204 days2011: Good 226 of 363 days2011: Moderate 137 of 363 days20112012: Good 225 of 365 days2012: Moderate 139 of 365 days2012: Unhealthy for Sensitive Groups 1 of 365 days2013: Good 269 of 352 days2013: Moderate 83 of 352 days20132014: Good 276 of 363 days2014: Moderate 86 of 363 days2014: Unhealthy for Sensitive Groups 1 of 363 days2015: Good 281 of 365 days2015: Moderate 84 of 365 days20152016: Good 280 of 363 days2016: Moderate 83 of 363 days2017: Good 258 of 352 days2017: Moderate 93 of 352 days2017: Unhealthy for Sensitive Groups 1 of 352 days20172018: Good 285 of 365 days2018: Moderate 79 of 365 days2018: Unhealthy for Sensitive Groups 1 of 365 days2019: Good 288 of 352 days2019: Moderate 64 of 352 days20192020: Good 275 of 365 days2020: Moderate 90 of 365 days2021: Good 251 of 365 days2021: Moderate 114 of 365 days20212022: Good 280 of 356 days2022: Moderate 75 of 356 days2022: Unhealthy for Sensitive Groups 1 of 356 days2023: Good 283 of 365 days2023: Moderate 81 of 365 days2023: Unhealthy for Sensitive Groups 1 of 365 days20232024: Good 309 of 357 days2024: Moderate 48 of 357 days2025: Good 290 of 365 days2025: Moderate 75 of 365 days2025
  • Good
  • Moderate
  • Unhealthy for Sensitive Groups
  • Unhealthy
  • Very Unhealthy
  • Hazardous

Typical and high-end AQI over time

The median is the middle day of the year. The 90th percentile is the level that only the highest 10% of days exceeded.

Median and 90th-percentile daily AQI, by year0501001996: 90th percentile AQI 391997: 90th percentile AQI 251998: 90th percentile AQI 232010: 90th percentile AQI 592011: 90th percentile AQI 602012: 90th percentile AQI 602013: 90th percentile AQI 552014: 90th percentile AQI 552015: 90th percentile AQI 562016: 90th percentile AQI 552017: 90th percentile AQI 572018: 90th percentile AQI 552019: 90th percentile AQI 542020: 90th percentile AQI 572021: 90th percentile AQI 572022: 90th percentile AQI 542023: 90th percentile AQI 552024: 90th percentile AQI 532025: 90th percentile AQI 551996: Median AQI 141997: Median AQI 161998: Median AQI 152010: Median AQI 462011: Median AQI 462012: Median AQI 462013: Median AQI 392014: Median AQI 412015: Median AQI 392016: Median AQI 412017: Median AQI 422018: Median AQI 422019: Median AQI 412020: Median AQI 422021: Median AQI 442022: Median AQI 422023: Median AQI 412024: Median AQI 392025: Median AQI 401996199820112013201520172019202120232025
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 2025

On each monitored day, the AQI reflects whichever measured pollutant had the highest index. This counts how many days each pollutant set the AQI. A pollutant that was not measured here cannot appear.

PollutantDays as main pollutantShare of monitored days
Fine particles (PM2.5)19854%
Ozone16746%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025365290750000405574PM2.5
2024357309480000395371Ozone
20233652838110004155127PM2.5
20223562807510004254108PM2.5
20213652511140000445788PM2.5
2020365275900000425796PM2.5
2019352288640000415485PM2.5
20183652857910004255112PM2.5
20173522589310004257115PM2.5
2016363280830000415587PM2.5
2015365281840000395678PM2.5
20143632768610004155101PM2.5
2013352269830000395579PM2.5
201236522513910004660122PM2.5
201136322613700004660100PM2.5
2010204123810000465977PM2.5
19986600000152323PM10
1997616100000162536PM10
1996302910000143953PM10

What this data can and can’t tell you

It is a county-level summary. EPA reports one AQI per day for the county, based on the monitors operating there. Air at a particular street, school or home can differ, especially near roads, industry or wildfire smoke.

It is not a health assessment. The AQI is EPA’s scale for communicating daily air quality. A county’s history can’t tell you what the health risk is for any particular person. For daily conditions and health guidance, see AirNow.

Rules change over time. EPA has revised AQI breakpoints, most recently for fine particles in 2024, so some year-to-year change can reflect the scale rather than the air.

Counties in Florida with a similar median AQI in 2025

All monitored counties in Florida

Source: U.S. EPA AirData, “Annual AQI by County” files for 1996–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem