EnviroNearby

Norfolk City, Virginia air quality history

Daily Air Quality Index summaries from EPA monitors in Norfolk City, Virginia, 1980–2025.

86%
Good days in 2025
33
Median daily AQI, 2025
0
Days above 100 in 2025
363
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Norfolk City, Virginia on 363 days. 312 of those days (86%) were in the Good range, and the median daily AQI was 33. 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 fine particles (PM2.5) on 319 days. Across the years with fuller monitoring, the share of Good days fell: an average of 97% in 1980–1982 versus 88% in 2023–2025.

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 335 of 343 days1980: Moderate 8 of 343 days19801981: Good 335 of 349 days1981: Moderate 14 of 349 days1982: Good 343 of 356 days1982: Moderate 13 of 356 days1983: Good 352 of 364 days1983: Moderate 11 of 364 days1983: Unhealthy for Sensitive Groups 1 of 364 days1984: Good 345 of 362 days1984: Moderate 13 of 362 days1984: Unhealthy for Sensitive Groups 4 of 362 days1985: Good 353 of 365 days1985: Moderate 12 of 365 days19851986: Good 287 of 308 days1986: Moderate 21 of 308 days1987: Good 343 of 364 days1987: Moderate 20 of 364 days1987: Unhealthy 1 of 364 days1988: Good 356 of 366 days1988: Moderate 9 of 366 days1988: Unhealthy for Sensitive Groups 1 of 366 days1989: Good 313 of 365 days1989: Moderate 52 of 365 days1990: Good 317 of 365 days1990: Moderate 48 of 365 days19901991: Good 316 of 365 days1991: Moderate 48 of 365 days1991: Unhealthy for Sensitive Groups 1 of 365 days1992: Good 327 of 366 days1992: Moderate 38 of 366 days1992: Unhealthy for Sensitive Groups 1 of 366 days1993: Good 324 of 365 days1993: Moderate 41 of 365 days1994: Good 320 of 365 days1994: Moderate 45 of 365 days1995: Good 319 of 365 days1995: Moderate 46 of 365 days19951996: Good 331 of 366 days1996: Moderate 35 of 366 days1997: Good 321 of 365 days1997: Moderate 44 of 365 days1998: Good 329 of 365 days1998: Moderate 36 of 365 days1999: Good 291 of 365 days1999: Moderate 71 of 365 days1999: Unhealthy for Sensitive Groups 3 of 365 days2000: Good 267 of 366 days2000: Moderate 97 of 366 days2000: Unhealthy for Sensitive Groups 2 of 366 days20002001: Good 276 of 365 days2001: Moderate 87 of 365 days2001: Unhealthy for Sensitive Groups 2 of 365 days2002: Good 272 of 365 days2002: Moderate 92 of 365 days2002: Unhealthy for Sensitive Groups 1 of 365 days2003: Good 275 of 364 days2003: Moderate 88 of 364 days2003: Unhealthy 1 of 364 days2004: Good 277 of 366 days2004: Moderate 89 of 366 days2005: Good 47 of 125 days2005: Moderate 78 of 125 days20052006: Good 78 of 163 days2006: Moderate 83 of 163 days2006: Unhealthy for Sensitive Groups 2 of 163 days2007: Good 301 of 365 days2007: Moderate 63 of 365 days2007: Unhealthy for Sensitive Groups 1 of 365 days2008: Good 293 of 366 days2008: Moderate 66 of 366 days2008: Unhealthy for Sensitive Groups 4 of 366 days2008: Unhealthy 3 of 366 days2009: Good 243 of 302 days2009: Moderate 59 of 302 days2010: Good 60 of 122 days2010: Moderate 62 of 122 days20102011: Good 303 of 361 days2011: Moderate 55 of 361 days2011: Unhealthy for Sensitive Groups 3 of 361 days2012: Good 328 of 366 days2012: Moderate 38 of 366 days2013: Good 329 of 365 days2013: Moderate 36 of 365 days2014: Good 318 of 365 days2014: Moderate 47 of 365 days2015: Good 332 of 365 days2015: Moderate 33 of 365 days20152016: Good 344 of 362 days2016: Moderate 18 of 362 days2017: Good 335 of 363 days2017: Moderate 28 of 363 days2018: Good 348 of 365 days2018: Moderate 17 of 365 days2019: Good 341 of 364 days2019: Moderate 23 of 364 days2020: Good 349 of 365 days2020: Moderate 16 of 365 days20202021: Good 340 of 362 days2021: Moderate 22 of 362 days2022: Good 348 of 361 days2022: Moderate 13 of 361 days2023: Good 334 of 364 days2023: Moderate 30 of 364 days2024: Good 314 of 366 days2024: Moderate 52 of 366 days2025: Good 312 of 363 days2025: Moderate 51 of 363 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 year0501001980: 90th percentile AQI 341981: 90th percentile AQI 411982: 90th percentile AQI 351983: 90th percentile AQI 361984: 90th percentile AQI 391985: 90th percentile AQI 351986: 90th percentile AQI 441987: 90th percentile AQI 421988: 90th percentile AQI 321989: 90th percentile AQI 531990: 90th percentile AQI 531991: 90th percentile AQI 521992: 90th percentile AQI 511993: 90th percentile AQI 511994: 90th percentile AQI 521995: 90th percentile AQI 531996: 90th percentile AQI 501997: 90th percentile AQI 521998: 90th percentile AQI 501999: 90th percentile AQI 652000: 90th percentile AQI 642001: 90th percentile AQI 632002: 90th percentile AQI 622003: 90th percentile AQI 612004: 90th percentile AQI 622005: 90th percentile AQI 762006: 90th percentile AQI 692007: 90th percentile AQI 592008: 90th percentile AQI 612009: 90th percentile AQI 562010: 90th percentile AQI 652011: 90th percentile AQI 572012: 90th percentile AQI 522013: 90th percentile AQI 492014: 90th percentile AQI 522015: 90th percentile AQI 472016: 90th percentile AQI 432017: 90th percentile AQI 462018: 90th percentile AQI 412019: 90th percentile AQI 472020: 90th percentile AQI 362021: 90th percentile AQI 422022: 90th percentile AQI 412023: 90th percentile AQI 472024: 90th percentile AQI 522025: 90th percentile AQI 531980: Median AQI 191981: Median AQI 201982: Median AQI 191983: Median AQI 181984: Median AQI 171985: Median AQI 151986: Median AQI 161987: Median AQI 171988: Median AQI 161989: Median AQI 341990: Median AQI 341991: Median AQI 371992: Median AQI 361993: Median AQI 381994: Median AQI 351995: Median AQI 331996: Median AQI 331997: Median AQI 351998: Median AQI 361999: Median AQI 342000: Median AQI 342001: Median AQI 372002: Median AQI 372003: Median AQI 332004: Median AQI 342005: Median AQI 562006: Median AQI 512007: Median AQI 272008: Median AQI 262009: Median AQI 272010: Median AQI 522011: Median AQI 252012: Median AQI 232013: Median AQI 212014: Median AQI 222015: Median AQI 212016: Median AQI 192017: Median AQI 192018: Median AQI 182019: Median AQI 202020: Median AQI 182021: Median AQI 182022: Median AQI 182023: Median AQI 182024: Median AQI 322025: Median AQI 331980198519901995200020052010201520202025
  • 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
Fine particles (PM2.5)31988%
Nitrogen dioxide (NO₂)4212%
Carbon monoxide (CO)21%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025363312510000335394PM2.5
2024366314520000325282PM2.5
2023364334300000184796NO2
2022361348130000184166NO2
2021362340220000184285NO2
2020365349160000183664NO2
2019364341230000204772NO2
2018365348170000184165NO2
2017363335280000194666NO2
2016362344180000194363NO2
2015365332330000214779NO2
2014365318470000225269NO2
2013365329360000214974NO2
2012366328380000235287NO2
20113613035530002557119NO2
201012260620000526597PM2.5
2009302243590000275670NO2
20083662936643002661170NO2
20073653016310002759106NO2
2006163788320005169109PM2.5
200512547780000567699PM2.5
2004366277890000346293NO2
20033642758801003361154NO2
20023652729210003762139NO2
20013652768720003763117NO2
20003662679720003464113NO2
19993652917130003465117NO2
19983653293600003650100NO2
1997365321440000355278NO2
1996366331350000335076NO2
1995365319460000335386NO2
1994365320450000355295NO2
1993365324410000385177NO2
19923663273810003651106NO2
19913653164810003752101NO2
1990365317480000345382NO2
1989365313520000345398NO2
1988366356910001632108CO
19873643432001001742154CO
1986308287210000164480CO
1985365353120000153585CO
19843623451340001739128CO
19833643521110001836143CO
1982356343130000193574CO
1981349335140000204168CO
198034333580000193473CO

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 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