EnviroNearby

Carroll County, Virginia air quality history

Daily Air Quality Index summaries from EPA monitors in Carroll, Virginia, 1989–2025.

100%
Good days in 2025
7
Median daily AQI, 2025
0
Days above 100 in 2025
60
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Carroll, Virginia on 60 days. 60 of those days (100%) were in the Good range, and the median daily AQI was 7. That median is lower than the typical monitored county in Virginia (median 37 across 25 counties), and lower than the typical monitored U.S. county (40). The main pollutant was coarse particles (PM10) on 60 days.

EPA did not report an AQI for every day of 2025 here (60 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 (2020, 2021, 2022, 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%1989: Good 30 of 32 days1989: Moderate 2 of 32 days19891990: Good 58 of 61 days1990: Moderate 3 of 61 days1991: Good 59 of 60 days1991: Moderate 1 of 60 days1992: Good 60 of 61 days1992: Moderate 1 of 61 days1993: Good 56 of 59 days1993: Moderate 3 of 59 days1994: Good 60 of 60 days19941995: Good 59 of 60 days1995: Moderate 1 of 60 days1996: Good 60 of 61 days1996: Moderate 1 of 61 days1997: Good 60 of 60 days1998: Good 60 of 60 days1999: Good 60 of 60 days19992000: Good 54 of 55 days2000: Moderate 1 of 55 days2001: Good 61 of 61 days2002: Good 57 of 57 days2003: Good 55 of 55 days2004: Good 60 of 60 days20042005: Good 55 of 55 days2006: Good 58 of 58 days2007: Good 58 of 58 days2008: Good 55 of 55 days2009: Good 47 of 47 days20092010: Good 56 of 56 days2011: Good 61 of 61 days2012: Good 61 of 61 days2013: Good 59 of 59 days2014: Good 58 of 58 days20142015: Good 58 of 58 days2016: Good 61 of 61 days2017: Good 60 of 60 days2018: Good 59 of 59 days2019: Good 61 of 61 days20192020: Good 56 of 56 days2021: Good 60 of 60 days2022: Good 56 of 56 days2023: Good 55 of 55 days2024: Good 60 of 60 days20242025: Good 60 of 60 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 year0501001989: 90th percentile AQI 431990: 90th percentile AQI 401991: 90th percentile AQI 361992: 90th percentile AQI 361993: 90th percentile AQI 441994: 90th percentile AQI 311995: 90th percentile AQI 331996: 90th percentile AQI 291997: 90th percentile AQI 361998: 90th percentile AQI 301999: 90th percentile AQI 302000: 90th percentile AQI 372001: 90th percentile AQI 282002: 90th percentile AQI 262003: 90th percentile AQI 252004: 90th percentile AQI 232005: 90th percentile AQI 282006: 90th percentile AQI 272007: 90th percentile AQI 312008: 90th percentile AQI 192009: 90th percentile AQI 182010: 90th percentile AQI 202011: 90th percentile AQI 202012: 90th percentile AQI 172013: 90th percentile AQI 162014: 90th percentile AQI 162015: 90th percentile AQI 182016: 90th percentile AQI 192017: 90th percentile AQI 162018: 90th percentile AQI 162019: 90th percentile AQI 152020: 90th percentile AQI 122021: 90th percentile AQI 162022: 90th percentile AQI 132023: 90th percentile AQI 192024: 90th percentile AQI 142025: 90th percentile AQI 161989: Median AQI 201990: Median AQI 211991: Median AQI 201992: Median AQI 211993: Median AQI 201994: Median AQI 191995: Median AQI 171996: Median AQI 181997: Median AQI 151998: Median AQI 171999: Median AQI 172000: Median AQI 162001: Median AQI 162002: Median AQI 152003: Median AQI 142004: Median AQI 132005: Median AQI 152006: Median AQI 142007: Median AQI 172008: Median AQI 122009: Median AQI 112010: Median AQI 132011: Median AQI 122012: Median AQI 92013: Median AQI 92014: Median AQI 92015: Median AQI 102016: Median AQI 112017: Median AQI 82018: Median AQI 92019: Median AQI 92020: Median AQI 72021: Median AQI 92022: Median AQI 72023: Median AQI 92024: Median AQI 72025: Median AQI 7198919941999200420092014201920242025
  • 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
Coarse particles (PM10)60100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
202560600000071619PM10
202460600000071431PM10
202355550000091945PM10
202256560000071323PM10
202160600000091633PM10
202056560000071215PM10
201961610000091518PM10
201859590000091622PM10
201760600000081619PM10
2016616100000111930PM10
2015585800000101835PM10
201458580000091618PM10
201359590000091631PM10
201261610000091726PM10
2011616100000122029PM10
2010565600000132031PM10
2009474700000111837PM10
2008555500000121927PM10
2007585800000173136PM10
2006585800000142738PM10
2005555500000152832PM10
2004606000000132328PM10
2003555500000142544PM10
2002575700000152634PM10
2001616100000162841PM10
2000555410000163753PM10
1999606000000173037PM10
1998606000000173043PM10
1997606000000153650PM10
1996616010000182955PM10
1995605910000173351PM10
1994606000000193140PM10
1993595630000204458PM10
1992616010000213651PM10
1991605910000203663PM10
1990615830000214053PM10
1989323020000204357PM10

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 Virginia with a similar median AQI in 2025

All monitored counties in Virginia

Source: U.S. EPA AirData, “Annual AQI by County” files for 1989–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem