EnviroNearby

Augusta County, Virginia air quality history

Daily Air Quality Index summaries from EPA monitors in Augusta, Virginia, 1985–1994.

59%
Good days in 1994
48
Median daily AQI, 1994
10
Days above 100 in 1994
175
Days with an AQI in 1994 (of 365)

In 1994, EPA reported a daily Air Quality Index (AQI) for Augusta, Virginia on 175 days. 103 of those days (59%) were in the Good range, and the median daily AQI was 48. That median is higher than the typical monitored county in Virginia (median 45 across 26 counties), and higher than the typical monitored U.S. county (39). The main pollutant was ozone on 175 days. Across the years with fuller monitoring, the share of Good days held roughly steady: an average of 68% in 1985–1987 versus 68% in 1992–1994.

EPA did not report an AQI for every day of 1994 here (175 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.

The most recent year with data for this county is 1994; EPA's files for 1995–2025 contain no row for it, which usually means its monitors stopped reporting.

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%1985: Good 124 of 173 days1985: Moderate 33 of 173 days1985: Unhealthy for Sensitive Groups 15 of 173 days1985: Unhealthy 1 of 173 days19851986: Good 249 of 351 days1986: Moderate 75 of 351 days1986: Unhealthy for Sensitive Groups 27 of 351 days19861987: Good 219 of 352 days1987: Moderate 91 of 352 days1987: Unhealthy for Sensitive Groups 34 of 352 days1987: Unhealthy 8 of 352 days19871988: Good 217 of 328 days1988: Moderate 69 of 328 days1988: Unhealthy for Sensitive Groups 25 of 328 days1988: Unhealthy 15 of 328 days1988: Very Unhealthy 2 of 328 days19881989: Good 286 of 337 days1989: Moderate 46 of 337 days1989: Unhealthy for Sensitive Groups 5 of 337 days19891990: Good 263 of 335 days1990: Moderate 57 of 335 days1990: Unhealthy for Sensitive Groups 14 of 335 days1990: Unhealthy 1 of 335 days19901991: Good 264 of 351 days1991: Moderate 78 of 351 days1991: Unhealthy for Sensitive Groups 9 of 351 days19911992: Good 241 of 289 days1992: Moderate 41 of 289 days1992: Unhealthy for Sensitive Groups 6 of 289 days1992: Unhealthy 1 of 289 days19921993: Good 94 of 153 days1993: Moderate 40 of 153 days1993: Unhealthy for Sensitive Groups 18 of 153 days1993: Unhealthy 1 of 153 days19931994: Good 103 of 175 days1994: Moderate 62 of 175 days1994: Unhealthy for Sensitive Groups 10 of 175 days1994
  • 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 year0501001501985: 90th percentile AQI 931986: 90th percentile AQI 901987: 90th percentile AQI 1051988: 90th percentile AQI 1151989: 90th percentile AQI 611990: 90th percentile AQI 801991: 90th percentile AQI 771992: 90th percentile AQI 641993: 90th percentile AQI 1051994: 90th percentile AQI 931985: Median AQI 401986: Median AQI 381987: Median AQI 441988: Median AQI 421989: Median AQI 361990: Median AQI 391991: Median AQI 411992: Median AQI 331993: Median AQI 471994: Median AQI 481985198619871988198919901991199219931994
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 1994

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
Ozone175100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
199417510362100004893140Ozone
199315394401810047105156Ozone
19922892414161003364166Ozone
19913512647890004177147Ozone
199033526357141003980151Ozone
19893372864650003661126Ozone
19883282176925152042115218Ozone
1987352219913480044105192Ozone
198635124975270003890150Ozone
198517312433151004093195Ozone

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 1994

All monitored counties in Virginia

Source: U.S. EPA AirData, “Annual AQI by County” files for 1985–1994 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem