EnviroNearby

Wexford County, Michigan air quality history

Daily Air Quality Index summaries from EPA monitors in Wexford, Michigan, 2000–2025.

94%
Good days in 2025
36
Median daily AQI, 2025
0
Days above 100 in 2025
360
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Wexford, Michigan on 360 days. 339 of those days (94%) were in the Good range, and the median daily AQI was 36. That median is lower than the typical monitored county in Michigan (median 39 across 26 counties), and lower than the typical monitored U.S. county (40). The main pollutant was ozone on 360 days. Across the years with fuller monitoring, the share of Good days rose: an average of 83% in 2001–2003 versus 92% in 2023–2025.

Years with fewer than 120 monitored days (2000) 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%2000: Good 64 of 64 days20002001: Good 307 of 360 days2001: Moderate 34 of 360 days2001: Unhealthy for Sensitive Groups 15 of 360 days2001: Unhealthy 4 of 360 days2002: Good 291 of 353 days2002: Moderate 40 of 353 days2002: Unhealthy for Sensitive Groups 18 of 353 days2002: Unhealthy 4 of 353 days20022003: Good 295 of 357 days2003: Moderate 46 of 357 days2003: Unhealthy for Sensitive Groups 15 of 357 days2003: Unhealthy 1 of 357 days2004: Good 311 of 352 days2004: Moderate 39 of 352 days2004: Unhealthy for Sensitive Groups 2 of 352 days20042005: Good 299 of 354 days2005: Moderate 46 of 354 days2005: Unhealthy for Sensitive Groups 9 of 354 days2006: Good 316 of 356 days2006: Moderate 31 of 356 days2006: Unhealthy for Sensitive Groups 7 of 356 days2006: Unhealthy 2 of 356 days20062007: Good 306 of 356 days2007: Moderate 33 of 356 days2007: Unhealthy for Sensitive Groups 11 of 356 days2007: Unhealthy 6 of 356 days2008: Good 309 of 361 days2008: Moderate 47 of 361 days2008: Unhealthy for Sensitive Groups 5 of 361 days20082009: Good 325 of 340 days2009: Moderate 13 of 340 days2009: Unhealthy for Sensitive Groups 2 of 340 days2010: Good 333 of 356 days2010: Moderate 23 of 356 days20102011: Good 298 of 321 days2011: Moderate 22 of 321 days2011: Unhealthy for Sensitive Groups 1 of 321 days2012: Good 297 of 334 days2012: Moderate 32 of 334 days2012: Unhealthy for Sensitive Groups 5 of 334 days20122013: Good 304 of 341 days2013: Moderate 37 of 341 days2014: Good 336 of 356 days2014: Moderate 20 of 356 days20142015: Good 334 of 356 days2015: Moderate 20 of 356 days2015: Unhealthy for Sensitive Groups 2 of 356 days2016: Good 329 of 355 days2016: Moderate 21 of 355 days2016: Unhealthy for Sensitive Groups 5 of 355 days20162017: Good 305 of 323 days2017: Moderate 18 of 323 days2018: Good 330 of 356 days2018: Moderate 24 of 356 days2018: Unhealthy for Sensitive Groups 2 of 356 days20182019: Good 322 of 340 days2019: Moderate 18 of 340 days2020: Good 341 of 356 days2020: Moderate 15 of 356 days20202021: Good 334 of 360 days2021: Moderate 25 of 360 days2021: Unhealthy for Sensitive Groups 1 of 360 days2022: Good 331 of 359 days2022: Moderate 24 of 359 days2022: Unhealthy for Sensitive Groups 4 of 359 days20222023: Good 314 of 359 days2023: Moderate 42 of 359 days2023: Unhealthy for Sensitive Groups 3 of 359 days2024: Good 341 of 363 days2024: Moderate 22 of 363 days20242025: Good 339 of 360 days2025: Moderate 21 of 360 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 year0501002000: 90th percentile AQI 352001: 90th percentile AQI 672002: 90th percentile AQI 742003: 90th percentile AQI 672004: 90th percentile AQI 512005: 90th percentile AQI 742006: 90th percentile AQI 542007: 90th percentile AQI 642008: 90th percentile AQI 582009: 90th percentile AQI 442010: 90th percentile AQI 482011: 90th percentile AQI 482012: 90th percentile AQI 512013: 90th percentile AQI 512014: 90th percentile AQI 472015: 90th percentile AQI 472016: 90th percentile AQI 492017: 90th percentile AQI 462018: 90th percentile AQI 492019: 90th percentile AQI 462020: 90th percentile AQI 442021: 90th percentile AQI 472022: 90th percentile AQI 492023: 90th percentile AQI 612024: 90th percentile AQI 482025: 90th percentile AQI 482000: Median AQI 292001: Median AQI 352002: Median AQI 352003: Median AQI 362004: Median AQI 342005: Median AQI 372006: Median AQI 352007: Median AQI 362008: Median AQI 342009: Median AQI 312010: Median AQI 352011: Median AQI 352012: Median AQI 332013: Median AQI 342014: Median AQI 352015: Median AQI 352016: Median AQI 342017: Median AQI 352018: Median AQI 352019: Median AQI 342020: Median AQI 332021: Median AQI 342022: Median AQI 352023: Median AQI 352024: Median AQI 342025: Median AQI 3620002002200420062008201020122014201620182020202220242025
  • 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
Ozone360100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025360339210000364893Ozone
2024363341220000344880Ozone
20233593144230003561105Ozone
20223593312440003549136Ozone
20213603342510003447105Ozone
20203563411500003344100Ozone
2019340322180000344674Ozone
20183563302420003549122Ozone
2017323305180000354680Ozone
20163553292150003449126Ozone
20153563342020003547112Ozone
20143563362000003547100Ozone
20133413043700003451100Ozone
20123342973250003351126Ozone
20113212982210003548147Ozone
20103563332300003548100Ozone
20093403251320003144122Ozone
20083613094750003458122Ozone
200735630633116003664182Ozone
20063563163172003554182Ozone
20053542994690003774129Ozone
20043523113920003451147Ozone
200335729546151003667172Ozone
200235329140184003574177Ozone
200136030734154003567172Ozone
2000646400000293536Ozone

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 Michigan with a similar median AQI in 2025

All monitored counties in Michigan

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