EnviroNearby

Fauquier County, Virginia air quality history

Daily Air Quality Index summaries from EPA monitors in Fauquier, Virginia, 1981–2025.

98%
Good days in 2025
34
Median daily AQI, 2025
0
Days above 100 in 2025
245
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Fauquier, Virginia on 245 days. 239 of those days (98%) were in the Good range, and the median daily AQI was 34. 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 ozone on 245 days. Across the years with fuller monitoring, the share of Good days rose: an average of 52% in 1982–1984 versus 96% in 2023–2025.

EPA did not report an AQI for every day of 2025 here (245 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 (1981) 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%1981: Good 29 of 50 days1981: Moderate 14 of 50 days1981: Unhealthy for Sensitive Groups 6 of 50 days1981: Unhealthy 1 of 50 days19811982: Good 64 of 124 days1982: Moderate 46 of 124 days1982: Unhealthy for Sensitive Groups 11 of 124 days1982: Unhealthy 3 of 124 days1983: Good 71 of 161 days1983: Moderate 52 of 161 days1983: Unhealthy for Sensitive Groups 28 of 161 days1983: Unhealthy 9 of 161 days1983: Very Unhealthy 1 of 161 days1984: Good 107 of 179 days1984: Moderate 55 of 179 days1984: Unhealthy for Sensitive Groups 16 of 179 days1984: Unhealthy 1 of 179 days1985: Good 75 of 182 days1985: Moderate 62 of 182 days1985: Unhealthy for Sensitive Groups 32 of 182 days1985: Unhealthy 13 of 182 days1986: Good 94 of 184 days1986: Moderate 62 of 184 days1986: Unhealthy for Sensitive Groups 25 of 184 days1986: Unhealthy 3 of 184 days19861987: Good 121 of 211 days1987: Moderate 57 of 211 days1987: Unhealthy for Sensitive Groups 30 of 211 days1987: Unhealthy 3 of 211 days1988: Good 98 of 207 days1988: Moderate 54 of 207 days1988: Unhealthy for Sensitive Groups 30 of 207 days1988: Unhealthy 21 of 207 days1988: Very Unhealthy 4 of 207 days1989: Good 126 of 214 days1989: Moderate 63 of 214 days1989: Unhealthy for Sensitive Groups 22 of 214 days1989: Unhealthy 3 of 214 days1990: Good 137 of 212 days1990: Moderate 60 of 212 days1990: Unhealthy for Sensitive Groups 13 of 212 days1990: Unhealthy 2 of 212 days1991: Good 85 of 189 days1991: Moderate 67 of 189 days1991: Unhealthy for Sensitive Groups 32 of 189 days1991: Unhealthy 5 of 189 days19911992: Good 131 of 207 days1992: Moderate 63 of 207 days1992: Unhealthy for Sensitive Groups 11 of 207 days1992: Unhealthy 2 of 207 days1993: Good 111 of 212 days1993: Moderate 69 of 212 days1993: Unhealthy for Sensitive Groups 28 of 212 days1993: Unhealthy 4 of 212 days1994: Good 129 of 213 days1994: Moderate 61 of 213 days1994: Unhealthy for Sensitive Groups 21 of 213 days1994: Unhealthy 2 of 213 days1995: Good 113 of 194 days1995: Moderate 59 of 194 days1995: Unhealthy for Sensitive Groups 21 of 194 days1995: Unhealthy 1 of 194 days1996: Good 123 of 214 days1996: Moderate 73 of 214 days1996: Unhealthy for Sensitive Groups 16 of 214 days1996: Unhealthy 2 of 214 days19961997: Good 129 of 214 days1997: Moderate 63 of 214 days1997: Unhealthy for Sensitive Groups 19 of 214 days1997: Unhealthy 3 of 214 days1998: Good 97 of 205 days1998: Moderate 65 of 205 days1998: Unhealthy for Sensitive Groups 32 of 205 days1998: Unhealthy 11 of 205 days1999: Good 102 of 208 days1999: Moderate 63 of 208 days1999: Unhealthy for Sensitive Groups 36 of 208 days1999: Unhealthy 7 of 208 days2000: Good 152 of 214 days2000: Moderate 51 of 214 days2000: Unhealthy for Sensitive Groups 10 of 214 days2000: Unhealthy 1 of 214 days2001: Good 152 of 214 days2001: Moderate 48 of 214 days2001: Unhealthy for Sensitive Groups 14 of 214 days20012002: Good 131 of 208 days2002: Moderate 51 of 208 days2002: Unhealthy for Sensitive Groups 24 of 208 days2002: Unhealthy 2 of 208 days2003: Good 177 of 209 days2003: Moderate 26 of 209 days2003: Unhealthy for Sensitive Groups 5 of 209 days2003: Unhealthy 1 of 209 days2004: Good 180 of 209 days2004: Moderate 24 of 209 days2004: Unhealthy for Sensitive Groups 3 of 209 days2004: Unhealthy 2 of 209 days2005: Good 163 of 213 days2005: Moderate 43 of 213 days2005: Unhealthy for Sensitive Groups 7 of 213 days2006: Good 164 of 213 days2006: Moderate 44 of 213 days2006: Unhealthy for Sensitive Groups 3 of 213 days2006: Unhealthy 2 of 213 days20062007: Good 155 of 213 days2007: Moderate 57 of 213 days2007: Unhealthy for Sensitive Groups 1 of 213 days2008: Good 185 of 210 days2008: Moderate 23 of 210 days2008: Unhealthy for Sensitive Groups 2 of 210 days2009: Good 196 of 213 days2009: Moderate 17 of 213 days2010: Good 165 of 210 days2010: Moderate 43 of 210 days2010: Unhealthy for Sensitive Groups 2 of 210 days2011: Good 188 of 213 days2011: Moderate 25 of 213 days20112012: Good 182 of 200 days2012: Moderate 18 of 200 days2013: Good 201 of 211 days2013: Moderate 10 of 211 days2014: Good 201 of 211 days2014: Moderate 10 of 211 days2015: Good 200 of 208 days2015: Moderate 8 of 208 days2016: Good 197 of 213 days2016: Moderate 16 of 213 days20162017: Good 238 of 245 days2017: Moderate 7 of 245 days2018: Good 232 of 244 days2018: Moderate 12 of 244 days2019: Good 229 of 233 days2019: Moderate 4 of 233 days2020: Good 241 of 242 days2020: Moderate 1 of 242 days2021: Good 226 of 237 days2021: Moderate 11 of 237 days20212022: Good 237 of 244 days2022: Moderate 7 of 244 days2023: Good 223 of 242 days2023: Moderate 17 of 242 days2023: Unhealthy for Sensitive Groups 2 of 242 days2024: Good 226 of 232 days2024: Moderate 6 of 232 days2025: Good 239 of 245 days2025: Moderate 6 of 245 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 year0501001502001981: 90th percentile AQI 1081982: 90th percentile AQI 1081983: 90th percentile AQI 1291984: 90th percentile AQI 1001985: 90th percentile AQI 1431986: 90th percentile AQI 1151987: 90th percentile AQI 1081988: 90th percentile AQI 1561989: 90th percentile AQI 1051990: 90th percentile AQI 931991: 90th percentile AQI 1221992: 90th percentile AQI 971993: 90th percentile AQI 1191994: 90th percentile AQI 1011995: 90th percentile AQI 1051996: 90th percentile AQI 971997: 90th percentile AQI 1011998: 90th percentile AQI 1261999: 90th percentile AQI 1222000: 90th percentile AQI 842001: 90th percentile AQI 872002: 90th percentile AQI 1052003: 90th percentile AQI 642004: 90th percentile AQI 582005: 90th percentile AQI 772006: 90th percentile AQI 712007: 90th percentile AQI 742008: 90th percentile AQI 542009: 90th percentile AQI 482010: 90th percentile AQI 672011: 90th percentile AQI 542012: 90th percentile AQI 502013: 90th percentile AQI 462014: 90th percentile AQI 462015: 90th percentile AQI 472016: 90th percentile AQI 492017: 90th percentile AQI 462018: 90th percentile AQI 482019: 90th percentile AQI 452020: 90th percentile AQI 422021: 90th percentile AQI 452022: 90th percentile AQI 442023: 90th percentile AQI 492024: 90th percentile AQI 462025: 90th percentile AQI 441981: Median AQI 471982: Median AQI 491983: Median AQI 581984: Median AQI 471985: Median AQI 641986: Median AQI 501987: Median AQI 471988: Median AQI 541989: Median AQI 471990: Median AQI 451991: Median AQI 581992: Median AQI 451993: Median AQI 501994: Median AQI 471995: Median AQI 471996: Median AQI 461997: Median AQI 481998: Median AQI 541999: Median AQI 512000: Median AQI 422001: Median AQI 442002: Median AQI 452003: Median AQI 382004: Median AQI 392005: Median AQI 412006: Median AQI 432007: Median AQI 442008: Median AQI 402009: Median AQI 352010: Median AQI 432011: Median AQI 372012: Median AQI 382013: Median AQI 332014: Median AQI 362015: Median AQI 362016: Median AQI 352017: Median AQI 362018: Median AQI 322019: Median AQI 372020: Median AQI 312021: Median AQI 342022: Median AQI 342023: Median AQI 392024: Median AQI 362025: Median AQI 341981198619911996200120062011201620212025
  • 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
Ozone245100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
202524523960000344477Ozone
202423222660000364664Ozone
20232422231720003949115Ozone
202224423770000344471Ozone
2021237226110000344577Ozone
202024224110000314261Ozone
201923322940000374564Ozone
2018244232120000324880Ozone
201724523870000364671Ozone
2016213197160000354993Ozone
201520820080000364761Ozone
2014211201100000364671Ozone
2013211201100000334680Ozone
2012200182180000385093Ozone
2011213188250000375490Ozone
20102101654320004367105Ozone
2009213196170000354884Ozone
20082101852320004054126Ozone
20072131555710004474108Ozone
20062131644432004371169Ozone
20052131634370004177115Ozone
20042091802432003958164Ozone
20032091772651003864179Ozone
2002208131512420045105161Ozone
200121415248140004487150Ozone
200021415251101004284154Ozone
1999208102633670051122174Ozone
1998205976532110054126197Ozone
1997214129631930048101174Ozone
199621412373162004697161Ozone
1995194113592110047105151Ozone
1994213129612120047101182Ozone
1993212111692840050119185Ozone
199220713163112004597166Ozone
199118985673250058122177Ozone
199021213760132004593164Ozone
1989214126632230047105166Ozone
1988207985430214054156233Ozone
1987211121573030047108166Ozone
198618494622530050115164Ozone
1985182756232130064143200Ozone
1984179107551610047100192Ozone
198316171522891058129220Ozone
198212464461130049108179Ozone
1981502914610047108156Ozone

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 1981–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem