EnviroNearby

Yavapai County, Arizona air quality history

Daily Air Quality Index summaries from EPA monitors in Yavapai, Arizona, 1980–2025.

66%
Good days in 2025
47
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 Yavapai, Arizona on 355 days. 234 of those days (66%) were in the Good range, and the median daily AQI was 47. That median is about the same as the typical monitored county in Arizona (median 47 across 13 counties), and higher than the typical monitored U.S. county (40). The main pollutant was ozone on 352 days. Across the years with fuller monitoring, the share of Good days fell: an average of 92% in 1981–1983 versus 70% in 2023–2025.

Years with fewer than 120 monitored days (1990, 1991, 1992, 1993, 1994, 1995…) 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%1980: Good 16 of 25 days1980: Moderate 8 of 25 days1980: Unhealthy for Sensitive Groups 1 of 25 days19801981: Good 266 of 286 days1981: Moderate 19 of 286 days1981: Unhealthy for Sensitive Groups 1 of 286 days1982: Good 251 of 283 days1982: Moderate 30 of 283 days1982: Unhealthy for Sensitive Groups 1 of 283 days1982: Unhealthy 1 of 283 days1983: Good 314 of 328 days1983: Moderate 14 of 328 days1984: Good 316 of 342 days1984: Moderate 25 of 342 days1984: Unhealthy for Sensitive Groups 1 of 342 days1990: Good 50 of 55 days1990: Moderate 5 of 55 days19901991: Good 58 of 60 days1991: Moderate 2 of 60 days1992: Good 58 of 61 days1992: Moderate 3 of 61 days1993: Good 60 of 61 days1993: Moderate 1 of 61 days1994: Good 60 of 61 days1994: Moderate 1 of 61 days1995: Good 59 of 60 days1995: Moderate 1 of 60 days19951996: Good 71 of 187 days1996: Moderate 79 of 187 days1996: Unhealthy for Sensitive Groups 35 of 187 days1996: Unhealthy 2 of 187 days1997: Good 91 of 225 days1997: Moderate 115 of 225 days1997: Unhealthy for Sensitive Groups 19 of 225 days1998: Good 68 of 219 days1998: Moderate 119 of 219 days1998: Unhealthy for Sensitive Groups 30 of 219 days1998: Unhealthy 2 of 219 days1999: Good 101 of 282 days1999: Moderate 146 of 282 days1999: Unhealthy for Sensitive Groups 33 of 282 days1999: Unhealthy 2 of 282 days2000: Good 196 of 354 days2000: Moderate 130 of 354 days2000: Unhealthy for Sensitive Groups 27 of 354 days2000: Unhealthy 1 of 354 days20002001: Good 166 of 316 days2001: Moderate 136 of 316 days2001: Unhealthy for Sensitive Groups 14 of 316 days2002: Good 124 of 263 days2002: Moderate 108 of 263 days2002: Unhealthy for Sensitive Groups 27 of 263 days2002: Unhealthy 4 of 263 days2003: Good 154 of 263 days2003: Moderate 109 of 263 days2004: Good 138 of 258 days2004: Moderate 109 of 258 days2004: Unhealthy for Sensitive Groups 11 of 258 days2005: Good 103 of 158 days2005: Moderate 43 of 158 days2005: Unhealthy for Sensitive Groups 12 of 158 days20052006: Good 123 of 124 days2006: Moderate 1 of 124 days2007: Good 112 of 120 days2007: Moderate 8 of 120 days2008: Good 117 of 161 days2008: Moderate 41 of 161 days2008: Unhealthy for Sensitive Groups 3 of 161 days2009: Good 224 of 264 days2009: Moderate 40 of 264 days2010: Good 219 of 263 days2010: Moderate 43 of 263 days2010: Unhealthy for Sensitive Groups 1 of 263 days20102011: Good 168 of 243 days2011: Moderate 72 of 243 days2011: Unhealthy for Sensitive Groups 3 of 243 days2012: Good 205 of 283 days2012: Moderate 69 of 283 days2012: Unhealthy for Sensitive Groups 9 of 283 days2013: Good 226 of 288 days2013: Moderate 61 of 288 days2013: Unhealthy for Sensitive Groups 1 of 288 days2014: Good 182 of 280 days2014: Moderate 92 of 280 days2014: Unhealthy for Sensitive Groups 6 of 280 days2015: Good 235 of 300 days2015: Moderate 65 of 300 days20152016: Good 299 of 349 days2016: Moderate 50 of 349 days2017: Good 231 of 340 days2017: Moderate 104 of 340 days2017: Unhealthy for Sensitive Groups 5 of 340 days2018: Good 289 of 365 days2018: Moderate 75 of 365 days2018: Unhealthy for Sensitive Groups 1 of 365 days2019: Good 298 of 357 days2019: Moderate 59 of 357 days2020: Good 265 of 331 days2020: Moderate 65 of 331 days2020: Unhealthy for Sensitive Groups 1 of 331 days20202021: Good 302 of 331 days2021: Moderate 29 of 331 days2022: Good 341 of 365 days2022: Moderate 24 of 365 days2023: Good 298 of 364 days2023: Moderate 66 of 364 days2024: Good 225 of 366 days2024: Moderate 139 of 366 days2024: Unhealthy for Sensitive Groups 2 of 366 days2025: Good 234 of 355 days2025: Moderate 121 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 year0501001501980: 90th percentile AQI 581981: 90th percentile AQI 491982: 90th percentile AQI 511983: 90th percentile AQI 441984: 90th percentile AQI 481990: 90th percentile AQI 491991: 90th percentile AQI 231992: 90th percentile AQI 331993: 90th percentile AQI 321994: 90th percentile AQI 331995: 90th percentile AQI 311996: 90th percentile AQI 1191997: 90th percentile AQI 1001998: 90th percentile AQI 1121999: 90th percentile AQI 1052000: 90th percentile AQI 972001: 90th percentile AQI 902002: 90th percentile AQI 1052003: 90th percentile AQI 742004: 90th percentile AQI 842005: 90th percentile AQI 902006: 90th percentile AQI 342007: 90th percentile AQI 432008: 90th percentile AQI 772009: 90th percentile AQI 542010: 90th percentile AQI 612011: 90th percentile AQI 742012: 90th percentile AQI 742013: 90th percentile AQI 642014: 90th percentile AQI 772015: 90th percentile AQI 642016: 90th percentile AQI 542017: 90th percentile AQI 742018: 90th percentile AQI 612019: 90th percentile AQI 542020: 90th percentile AQI 612021: 90th percentile AQI 502022: 90th percentile AQI 482023: 90th percentile AQI 612024: 90th percentile AQI 802025: 90th percentile AQI 671980: Median AQI 471981: Median AQI 361982: Median AQI 341983: Median AQI 51984: Median AQI 141990: Median AQI 151991: Median AQI 151992: Median AQI 171993: Median AQI 181994: Median AQI 181995: Median AQI 181996: Median AQI 671997: Median AQI 581998: Median AQI 671999: Median AQI 612000: Median AQI 482001: Median AQI 502002: Median AQI 542003: Median AQI 492004: Median AQI 492005: Median AQI 242006: Median AQI 182007: Median AQI 212008: Median AQI 332009: Median AQI 432010: Median AQI 422011: Median AQI 442012: Median AQI 452013: Median AQI 442014: Median AQI 442015: Median AQI 412016: Median AQI 402017: Median AQI 462018: Median AQI 442019: Median AQI 432020: Median AQI 452021: Median AQI 442022: Median AQI 402023: Median AQI 432024: Median AQI 472025: Median AQI 47198019901995200020052010201520202025
  • 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
Ozone35299%
Fine particles (PM2.5)31%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20253552341210000476797Ozone
202436622513920004780115Ozone
2023364298660000436187Ozone
2022365341240000404887Ozone
2021331302290000445064Ozone
20203312656510004561119Ozone
2019357298590000435487Ozone
20183652897510004461101Ozone
201734023110450004674119Ozone
2016349299500000405490Ozone
20153002356500004164100Ozone
20142801829260004477140Ozone
20132882266110004464101Ozone
20122832056990004574112Ozone
20112431687230004474126Ozone
20102632194310004261122Ozone
2009264224400000435487Ozone
20081611174130003377101PM2.5
200712011280000214382PM2.5
200612412310000183451PM2.5
200515810343120002490119PM2.5
2004258138109110004984140Ozone
200326315410900004974100Ozone
20022631241082740054105166Ozone
2001316166136140005090122Ozone
2000354196130271004897151Ozone
19992821011463320061105159Ozone
1998219681193020067112154Ozone
1997225911151900058100143Ozone
199618771793520067119169Ozone
1995605910000183158PM10
1994616010000183351PM10
1993616010000183257PM10
1992615830000173364PM10
1991605820000152369PM10
1990555050000154994PM10
19843423162510001448115Ozone
1983328314140000544100CO
19822832513011003451179CO
19812862661910003649105CO
19802516810004758108CO

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 Arizona with a similar median AQI in 2025

All monitored counties in Arizona

Source: U.S. EPA AirData, “Annual AQI by County” files for 1980–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem