EnviroNearby

Wayne County, Utah air quality history

Daily Air Quality Index summaries from EPA monitors in Wayne, Utah, 2000–2025.

96%
Good days in 2022
12
Median daily AQI, 2022
0
Days above 100 in 2022
122
Days with an AQI in 2022 (of 365)

In 2022, EPA reported a daily Air Quality Index (AQI) for Wayne, Utah on 122 days. 117 of those days (96%) were in the Good range, and the median daily AQI was 12. That median is lower than the typical monitored county in Utah (median 44 across 15 counties), and lower than the typical monitored U.S. county (41). The main pollutant was fine particles (PM2.5) on 122 days.

EPA did not report an AQI for every day of 2022 here (122 of 365 days). Figures describe monitored days only; seasonal monitoring (for example, ozone measured only in warmer months) can make a county look cleaner or dirtier than a full-year record would.

Years with fewer than 120 monitored days (2018, 2019, 2020, 2023, 2024, 2025…) 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 68 of 70 days2000: Moderate 2 of 70 days20002001: Good 68 of 69 days2001: Moderate 1 of 69 days2002: Good 77 of 78 days2002: Moderate 1 of 78 days20022003: Good 100 of 100 days2004: Good 101 of 101 days20042005: Good 108 of 110 days2005: Moderate 2 of 110 days2006: Good 98 of 98 days20062007: Good 114 of 116 days2007: Moderate 2 of 116 days2008: Good 107 of 112 days2008: Moderate 5 of 112 days20082009: Good 113 of 114 days2009: Moderate 1 of 114 days2010: Good 112 of 112 days20102011: Good 118 of 120 days2011: Moderate 2 of 120 days2012: Good 115 of 120 days2012: Moderate 5 of 120 days20122013: Good 119 of 119 days2014: Good 116 of 116 days20142015: Good 117 of 119 days2015: Moderate 2 of 119 days2016: Good 120 of 120 days20162017: Good 110 of 112 days2017: Moderate 2 of 112 days2018: Good 111 of 117 days2018: Moderate 6 of 117 days20182019: Good 109 of 109 days2020: Good 111 of 116 days2020: Moderate 5 of 116 days20202021: Good 111 of 120 days2021: Moderate 9 of 120 days2022: Good 117 of 122 days2022: Moderate 5 of 122 days20222023: Good 115 of 117 days2023: Moderate 2 of 117 days2024: Good 116 of 119 days2024: Moderate 3 of 119 days20242025: Good 92 of 94 days2025: Moderate 2 of 94 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 282001: 90th percentile AQI 252002: 90th percentile AQI 292003: 90th percentile AQI 262004: 90th percentile AQI 282005: 90th percentile AQI 282006: 90th percentile AQI 272007: 90th percentile AQI 302008: 90th percentile AQI 292009: 90th percentile AQI 242010: 90th percentile AQI 212011: 90th percentile AQI 202012: 90th percentile AQI 322013: 90th percentile AQI 262014: 90th percentile AQI 242015: 90th percentile AQI 222016: 90th percentile AQI 242017: 90th percentile AQI 262018: 90th percentile AQI 282019: 90th percentile AQI 212020: 90th percentile AQI 372021: 90th percentile AQI 382022: 90th percentile AQI 302023: 90th percentile AQI 212024: 90th percentile AQI 252025: 90th percentile AQI 272000: Median AQI 142001: Median AQI 152002: Median AQI 142003: Median AQI 132004: Median AQI 162005: Median AQI 122006: Median AQI 122007: Median AQI 142008: Median AQI 142009: Median AQI 132010: Median AQI 122011: Median AQI 122012: Median AQI 142013: Median AQI 122014: Median AQI 112015: Median AQI 102016: Median AQI 112017: Median AQI 102018: Median AQI 132019: Median AQI 122020: Median AQI 102021: Median AQI 112022: Median AQI 122023: Median AQI 122024: Median AQI 112025: Median AQI 1420002002200420062008201020122014201620182020202220242025
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 2022

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)122100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025949220000142757PM2.5
202411911630000112556PM2.5
202311711520000122154PM2.5
202212211750000123062PM2.5
202112011190000113884PM2.5
202011611150000103770PM2.5
201910910900000122127PM2.5
201811711160000132870PM2.5
201711211020000102674PM2.5
201612012000000112446PM2.5
201511911720000102268PM2.5
201411611600000112439PM2.5
201311911900000122647PM2.5
201212011550000143261PM2.5
201112011820000122056PM2.5
201011211200000122133PM2.5
200911411310000132471PM2.5
200811210750000142958PM2.5
200711611420000143072PM2.5
2006989800000122749PM2.5
200511010820000122852PM2.5
200410110100000162850PM2.5
200310010000000132636PM2.5
2002787710000142951PM2.5
2001696810000152579PM2.5
2000706820000142860PM2.5

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.

All monitored counties in Utah

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