EnviroNearby

Oneida County, New York air quality history

Daily Air Quality Index summaries from EPA monitors in Oneida, New York, 1980–2025.

84%
Good days in 2025
27
Median daily AQI, 2025
0
Days above 100 in 2025
353
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Oneida, New York on 353 days. 298 of those days (84%) were in the Good range, and the median daily AQI was 27. That median is lower than the typical monitored county in New York (median 36 across 27 counties), and lower than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 353 days. Across the years with fuller monitoring, the share of Good days held roughly steady: an average of 84% in 1980–1982 versus 83% 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 296 of 366 days1980: Moderate 39 of 366 days1980: Unhealthy for Sensitive Groups 21 of 366 days1980: Unhealthy 8 of 366 days1980: Very Unhealthy 2 of 366 days19801981: Good 310 of 365 days1981: Moderate 46 of 365 days1981: Unhealthy for Sensitive Groups 5 of 365 days1981: Unhealthy 4 of 365 days1982: Good 312 of 365 days1982: Moderate 37 of 365 days1982: Unhealthy for Sensitive Groups 8 of 365 days1982: Unhealthy 8 of 365 days1983: Good 312 of 357 days1983: Moderate 32 of 357 days1983: Unhealthy for Sensitive Groups 10 of 357 days1983: Unhealthy 3 of 357 days1984: Good 327 of 361 days1984: Moderate 26 of 361 days1984: Unhealthy for Sensitive Groups 8 of 361 days1985: Good 311 of 334 days1985: Moderate 20 of 334 days1985: Unhealthy for Sensitive Groups 3 of 334 days19851986: Good 309 of 346 days1986: Moderate 31 of 346 days1986: Unhealthy for Sensitive Groups 6 of 346 days1987: Good 303 of 360 days1987: Moderate 42 of 360 days1987: Unhealthy for Sensitive Groups 7 of 360 days1987: Unhealthy 8 of 360 days1988: Good 299 of 360 days1988: Moderate 34 of 360 days1988: Unhealthy for Sensitive Groups 14 of 360 days1988: Unhealthy 10 of 360 days1988: Very Unhealthy 3 of 360 days1989: Good 303 of 345 days1989: Moderate 33 of 345 days1989: Unhealthy for Sensitive Groups 9 of 345 days1990: Good 299 of 355 days1990: Moderate 39 of 355 days1990: Unhealthy for Sensitive Groups 12 of 355 days1990: Unhealthy 4 of 355 days1990: Very Unhealthy 1 of 355 days19901991: Good 304 of 355 days1991: Moderate 33 of 355 days1991: Unhealthy for Sensitive Groups 11 of 355 days1991: Unhealthy 7 of 355 days1992: Good 328 of 355 days1992: Moderate 21 of 355 days1992: Unhealthy for Sensitive Groups 5 of 355 days1992: Unhealthy 1 of 355 days1993: Good 326 of 356 days1993: Moderate 28 of 356 days1993: Unhealthy for Sensitive Groups 2 of 356 days1994: Good 331 of 364 days1994: Moderate 28 of 364 days1994: Unhealthy for Sensitive Groups 5 of 364 days1995: Good 334 of 362 days1995: Moderate 22 of 362 days1995: Unhealthy for Sensitive Groups 5 of 362 days1995: Unhealthy 1 of 362 days19951996: Good 338 of 361 days1996: Moderate 21 of 361 days1996: Unhealthy for Sensitive Groups 2 of 361 days1997: Good 334 of 364 days1997: Moderate 23 of 364 days1997: Unhealthy for Sensitive Groups 7 of 364 days1998: Good 324 of 361 days1998: Moderate 32 of 361 days1998: Unhealthy for Sensitive Groups 4 of 361 days1998: Unhealthy 1 of 361 days1999: Good 300 of 364 days1999: Moderate 54 of 364 days1999: Unhealthy for Sensitive Groups 9 of 364 days1999: Unhealthy 1 of 364 days2000: Good 290 of 364 days2000: Moderate 71 of 364 days2000: Unhealthy for Sensitive Groups 2 of 364 days2000: Unhealthy 1 of 364 days20002001: Good 238 of 338 days2001: Moderate 90 of 338 days2001: Unhealthy for Sensitive Groups 7 of 338 days2001: Unhealthy 3 of 338 days2002: Good 194 of 290 days2002: Moderate 80 of 290 days2002: Unhealthy for Sensitive Groups 10 of 290 days2002: Unhealthy 6 of 290 days2003: Good 189 of 236 days2003: Moderate 39 of 236 days2003: Unhealthy for Sensitive Groups 6 of 236 days2003: Unhealthy 2 of 236 days2004: Good 204 of 224 days2004: Moderate 17 of 224 days2004: Unhealthy for Sensitive Groups 3 of 224 days2005: Good 196 of 217 days2005: Moderate 18 of 217 days2005: Unhealthy for Sensitive Groups 3 of 217 days20052006: Good 204 of 231 days2006: Moderate 26 of 231 days2006: Unhealthy for Sensitive Groups 1 of 231 days2007: Good 201 of 365 days2007: Moderate 160 of 365 days2007: Unhealthy for Sensitive Groups 4 of 365 days2008: Good 184 of 366 days2008: Moderate 180 of 366 days2008: Unhealthy for Sensitive Groups 2 of 366 days2009: Good 249 of 365 days2009: Moderate 116 of 365 days2010: Good 262 of 365 days2010: Moderate 103 of 365 days20102011: Good 241 of 365 days2011: Moderate 124 of 365 days2012: Good 244 of 366 days2012: Moderate 120 of 366 days2012: Unhealthy for Sensitive Groups 2 of 366 days2013: Good 273 of 361 days2013: Moderate 88 of 361 days2014: Good 270 of 356 days2014: Moderate 86 of 356 days2015: Good 263 of 365 days2015: Moderate 102 of 365 days20152016: Good 298 of 362 days2016: Moderate 64 of 362 days2017: Good 313 of 359 days2017: Moderate 46 of 359 days2018: Good 311 of 364 days2018: Moderate 53 of 364 days2019: Good 331 of 355 days2019: Moderate 24 of 355 days2020: Good 324 of 349 days2020: Moderate 25 of 349 days20202021: Good 311 of 347 days2021: Moderate 35 of 347 days2021: Unhealthy for Sensitive Groups 1 of 347 days2022: Good 288 of 332 days2022: Moderate 44 of 332 days2023: Good 275 of 351 days2023: Moderate 70 of 351 days2023: Unhealthy for Sensitive Groups 3 of 351 days2023: Unhealthy 3 of 351 days2024: Good 300 of 349 days2024: Moderate 49 of 349 days2025: Good 298 of 353 days2025: Moderate 55 of 353 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 841981: 90th percentile AQI 641982: 90th percentile AQI 641983: 90th percentile AQI 641984: 90th percentile AQI 491985: 90th percentile AQI 451986: 90th percentile AQI 511987: 90th percentile AQI 801988: 90th percentile AQI 841989: 90th percentile AQI 611990: 90th percentile AQI 711991: 90th percentile AQI 641992: 90th percentile AQI 481993: 90th percentile AQI 491994: 90th percentile AQI 501995: 90th percentile AQI 491996: 90th percentile AQI 471997: 90th percentile AQI 471998: 90th percentile AQI 511999: 90th percentile AQI 642000: 90th percentile AQI 642001: 90th percentile AQI 742002: 90th percentile AQI 872003: 90th percentile AQI 712004: 90th percentile AQI 502005: 90th percentile AQI 502006: 90th percentile AQI 522007: 90th percentile AQI 732008: 90th percentile AQI 702009: 90th percentile AQI 622010: 90th percentile AQI 642011: 90th percentile AQI 622012: 90th percentile AQI 612013: 90th percentile AQI 592014: 90th percentile AQI 572015: 90th percentile AQI 592016: 90th percentile AQI 532017: 90th percentile AQI 522018: 90th percentile AQI 532019: 90th percentile AQI 472020: 90th percentile AQI 482021: 90th percentile AQI 512022: 90th percentile AQI 522023: 90th percentile AQI 562024: 90th percentile AQI 532025: 90th percentile AQI 541980: Median AQI 331981: Median AQI 291982: Median AQI 341983: Median AQI 311984: Median AQI 311985: Median AQI 301986: Median AQI 301987: Median AQI 331988: Median AQI 321989: Median AQI 341990: Median AQI 331991: Median AQI 321992: Median AQI 311993: Median AQI 311994: Median AQI 311995: Median AQI 311996: Median AQI 321997: Median AQI 311998: Median AQI 321999: Median AQI 362000: Median AQI 352001: Median AQI 402002: Median AQI 412003: Median AQI 402004: Median AQI 342005: Median AQI 352006: Median AQI 332007: Median AQI 472008: Median AQI 502009: Median AQI 362010: Median AQI 382011: Median AQI 392012: Median AQI 422013: Median AQI 322014: Median AQI 322015: Median AQI 362016: Median AQI 272017: Median AQI 262018: Median AQI 242019: Median AQI 232020: Median AQI 212021: Median AQI 252022: Median AQI 262023: Median AQI 322024: Median AQI 272025: Median AQI 271980198519901995200020052010201520202025
  • 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)353100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025353298550000275499PM2.5
2024349300490000275368PM2.5
20233512757033003256190PM2.5
2022332288440000265283PM2.5
20213473113510002551107PM2.5
2020349324250000214881PM2.5
2019355331240000234764PM2.5
2018364311530000245374PM2.5
2017359313460000265267PM2.5
2016362298640000275369PM2.5
20153652631020000365974PM2.5
2014356270860000325782PM2.5
2013361273880000325984PM2.5
201236624412020004261108Ozone
20113652411240000396293PM2.5
20103652621030000386497PM2.5
20093652491160000366288PM2.5
200836618418020005070133PM2.5
200736520116040004773119PM2.5
20062312042610003352101Ozone
20052171961830003550133Ozone
20042242041730003450133Ozone
20032361893962004071185Ozone
200229019480106004187179Ozone
20013382389073004074166Ozone
20003642907121003564179Ozone
19993643005491003664151Ozone
19983613243241003251151Ozone
19973643342370003147147Ozone
19963613382120003247122Ozone
19953623342251003149159Ozone
19943643312850003150119Ozone
19933563262820003149147Ozone
19923553282151003148154Ozone
199135530433117003264177Ozone
199035529939124103371204Ozone
19893453033390003461143Ozone
1988360299341410303284206Ozone
19873603034278003380190Ozone
19863463093160003051150Ozone
19853343112030003045122Ozone
19843613272680003149126Ozone
198335731232103003164179Ozone
19823653123788003464190Ozone
19813653104654002964190Ozone
198036629639218203384204Ozone

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 New York with a similar median AQI in 2025

All monitored counties in New York

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