EnviroNearby

Baldwin County, Alabama air quality history

Daily Air Quality Index summaries from EPA monitors in Baldwin, Alabama, 2000–2025.

75%
Good days in 2025
42
Median daily AQI, 2025
0
Days above 100 in 2025
355
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Baldwin, Alabama on 355 days. 268 of those days (75%) were in the Good range, and the median daily AQI was 42. That median is about the same as the typical monitored county in Alabama (median 41 across 14 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 219 days. Across the years with fuller monitoring, the share of Good days rose: an average of 56% in 2000–2002 versus 74% in 2023–2025.

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%2000: Good 104 of 257 days2000: Moderate 103 of 257 days2000: Unhealthy for Sensitive Groups 39 of 257 days2000: Unhealthy 10 of 257 days2000: Very Unhealthy 1 of 257 days20002001: Good 174 of 283 days2001: Moderate 95 of 283 days2001: Unhealthy for Sensitive Groups 12 of 283 days2001: Unhealthy 2 of 283 days2002: Good 184 of 278 days2002: Moderate 90 of 278 days2002: Unhealthy for Sensitive Groups 4 of 278 days20022003: Good 166 of 278 days2003: Moderate 100 of 278 days2003: Unhealthy for Sensitive Groups 11 of 278 days2003: Unhealthy 1 of 278 days2004: Good 158 of 271 days2004: Moderate 98 of 271 days2004: Unhealthy for Sensitive Groups 15 of 271 days20042005: Good 142 of 254 days2005: Moderate 102 of 254 days2005: Unhealthy for Sensitive Groups 10 of 254 days2006: Good 152 of 280 days2006: Moderate 103 of 280 days2006: Unhealthy for Sensitive Groups 24 of 280 days2006: Unhealthy 1 of 280 days20062007: Good 161 of 269 days2007: Moderate 92 of 269 days2007: Unhealthy for Sensitive Groups 15 of 269 days2007: Unhealthy 1 of 269 days2008: Good 189 of 265 days2008: Moderate 71 of 265 days2008: Unhealthy for Sensitive Groups 5 of 265 days20082009: Good 200 of 252 days2009: Moderate 50 of 252 days2009: Unhealthy for Sensitive Groups 2 of 252 days2010: Good 161 of 274 days2010: Moderate 107 of 274 days2010: Unhealthy for Sensitive Groups 6 of 274 days20102011: Good 177 of 282 days2011: Moderate 96 of 282 days2011: Unhealthy for Sensitive Groups 9 of 282 days2012: Good 202 of 284 days2012: Moderate 80 of 284 days2012: Unhealthy for Sensitive Groups 2 of 284 days20122013: Good 213 of 273 days2013: Moderate 60 of 273 days2014: Good 209 of 280 days2014: Moderate 69 of 280 days2014: Unhealthy for Sensitive Groups 2 of 280 days20142015: Good 205 of 264 days2015: Moderate 58 of 264 days2015: Unhealthy for Sensitive Groups 1 of 264 days2016: Good 233 of 279 days2016: Moderate 46 of 279 days20162017: Good 224 of 270 days2017: Moderate 45 of 270 days2017: Unhealthy for Sensitive Groups 1 of 270 days2018: Good 232 of 270 days2018: Moderate 38 of 270 days20182019: Good 221 of 271 days2019: Moderate 50 of 271 days2020: Good 223 of 269 days2020: Moderate 46 of 269 days20202021: Good 248 of 280 days2021: Moderate 32 of 280 days2022: Good 237 of 281 days2022: Moderate 44 of 281 days20222023: Good 236 of 347 days2023: Moderate 111 of 347 days2024: Good 278 of 355 days2024: Moderate 77 of 355 days20242025: Good 268 of 355 days2025: Moderate 87 of 355 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 year0501001502000: 90th percentile AQI 1292001: 90th percentile AQI 842002: 90th percentile AQI 712003: 90th percentile AQI 772004: 90th percentile AQI 852005: 90th percentile AQI 802006: 90th percentile AQI 972007: 90th percentile AQI 872008: 90th percentile AQI 712009: 90th percentile AQI 582010: 90th percentile AQI 712011: 90th percentile AQI 742012: 90th percentile AQI 632013: 90th percentile AQI 582014: 90th percentile AQI 622015: 90th percentile AQI 572016: 90th percentile AQI 552017: 90th percentile AQI 562018: 90th percentile AQI 542019: 90th percentile AQI 552020: 90th percentile AQI 542021: 90th percentile AQI 522022: 90th percentile AQI 522023: 90th percentile AQI 602024: 90th percentile AQI 582025: 90th percentile AQI 552000: Median AQI 552001: Median AQI 462002: Median AQI 432003: Median AQI 452004: Median AQI 462005: Median AQI 492006: Median AQI 502007: Median AQI 462008: Median AQI 392009: Median AQI 382010: Median AQI 472011: Median AQI 442012: Median AQI 412013: Median AQI 402014: Median AQI 402015: Median AQI 392016: Median AQI 402017: Median AQI 392018: Median AQI 372019: Median AQI 402020: Median AQI 382021: Median AQI 372022: Median AQI 392023: Median AQI 432024: Median AQI 402025: Median AQI 4220002002200420062008201020122014201620182020202220242025
  • 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)21962%
Ozone13638%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025355268870000425587PM2.5
2024355278770000405890PM2.5
20233472361110000436090PM2.5
2022281237440000395297Ozone
2021280248320000375263Ozone
2020269223460000385474Ozone
2019271221500000405580Ozone
2018270232380000375497Ozone
20172702244510003956108Ozone
2016279233460000405587Ozone
20152642055810003957129Ozone
20142802096920004062112Ozone
2013273213600000405887Ozone
20122842028020004163112Ozone
20112821779690004474126Ozone
201027416110760004771150Ozone
20092522005020003858136Ozone
20082651897150003971133Ozone
200726916192151004687154Ozone
2006280152103241005097156Ozone
2005254142102100004980147Ozone
200427115898150004685143Ozone
2003278166100111004577174Ozone
20022781849040004371105Ozone
200128317495122004684159Ozone
200025710410339101055129205Ozone

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 Alabama with a similar median AQI in 2025

All monitored counties in Alabama

Source: U.S. EPA AirData, “Annual AQI by County” files for 2000–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem