EnviroNearby

Lackawanna County, Pennsylvania air quality history

Daily Air Quality Index summaries from EPA monitors in Lackawanna, Pennsylvania, 1980–2025.

74%
Good days in 2025
39
Median daily AQI, 2025
3
Days above 100 in 2025
365
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Lackawanna, Pennsylvania on 365 days. 270 of those days (74%) were in the Good range, and the median daily AQI was 39. That median is about the same as the typical monitored county in Pennsylvania (median 40 across 38 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was ozone on 235 days. Across the years with fuller monitoring, the share of Good days rose: an average of 66% in 1980–1982 versus 70% 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 233 of 345 days1980: Moderate 63 of 345 days1980: Unhealthy for Sensitive Groups 18 of 345 days1980: Unhealthy 23 of 345 days1980: Very Unhealthy 8 of 345 days19801981: Good 245 of 359 days1981: Moderate 82 of 359 days1981: Unhealthy for Sensitive Groups 27 of 359 days1981: Unhealthy 5 of 359 days1982: Good 225 of 365 days1982: Moderate 110 of 365 days1982: Unhealthy for Sensitive Groups 16 of 365 days1982: Unhealthy 10 of 365 days1982: Very Unhealthy 4 of 365 days1983: Good 282 of 365 days1983: Moderate 55 of 365 days1983: Unhealthy for Sensitive Groups 20 of 365 days1983: Unhealthy 8 of 365 days1984: Good 268 of 366 days1984: Moderate 69 of 366 days1984: Unhealthy for Sensitive Groups 23 of 366 days1984: Unhealthy 6 of 366 days1985: Good 227 of 365 days1985: Moderate 110 of 365 days1985: Unhealthy for Sensitive Groups 25 of 365 days1985: Unhealthy 3 of 365 days19851986: Good 291 of 365 days1986: Moderate 56 of 365 days1986: Unhealthy for Sensitive Groups 15 of 365 days1986: Unhealthy 3 of 365 days1987: Good 258 of 365 days1987: Moderate 78 of 365 days1987: Unhealthy for Sensitive Groups 21 of 365 days1987: Unhealthy 6 of 365 days1987: Very Unhealthy 2 of 365 days1988: Good 259 of 366 days1988: Moderate 61 of 366 days1988: Unhealthy for Sensitive Groups 18 of 366 days1988: Unhealthy 17 of 366 days1988: Very Unhealthy 11 of 366 days1989: Good 240 of 365 days1989: Moderate 104 of 365 days1989: Unhealthy for Sensitive Groups 15 of 365 days1989: Unhealthy 6 of 365 days1990: Good 273 of 365 days1990: Moderate 76 of 365 days1990: Unhealthy for Sensitive Groups 12 of 365 days1990: Unhealthy 4 of 365 days19901991: Good 255 of 365 days1991: Moderate 70 of 365 days1991: Unhealthy for Sensitive Groups 27 of 365 days1991: Unhealthy 9 of 365 days1991: Very Unhealthy 4 of 365 days1992: Good 312 of 366 days1992: Moderate 44 of 366 days1992: Unhealthy for Sensitive Groups 8 of 366 days1992: Unhealthy 2 of 366 days1993: Good 274 of 365 days1993: Moderate 61 of 365 days1993: Unhealthy for Sensitive Groups 24 of 365 days1993: Unhealthy 6 of 365 days1994: Good 246 of 365 days1994: Moderate 91 of 365 days1994: Unhealthy for Sensitive Groups 23 of 365 days1994: Unhealthy 5 of 365 days1995: Good 280 of 365 days1995: Moderate 52 of 365 days1995: Unhealthy for Sensitive Groups 23 of 365 days1995: Unhealthy 10 of 365 days19951996: Good 294 of 366 days1996: Moderate 54 of 366 days1996: Unhealthy for Sensitive Groups 15 of 366 days1996: Unhealthy 3 of 366 days1997: Good 284 of 365 days1997: Moderate 58 of 365 days1997: Unhealthy for Sensitive Groups 16 of 365 days1997: Unhealthy 7 of 365 days1998: Good 283 of 365 days1998: Moderate 50 of 365 days1998: Unhealthy for Sensitive Groups 26 of 365 days1998: Unhealthy 6 of 365 days1999: Good 197 of 365 days1999: Moderate 136 of 365 days1999: Unhealthy for Sensitive Groups 20 of 365 days1999: Unhealthy 12 of 365 days2000: Good 169 of 366 days2000: Moderate 183 of 366 days2000: Unhealthy for Sensitive Groups 13 of 366 days2000: Unhealthy 1 of 366 days20002001: Good 144 of 365 days2001: Moderate 190 of 365 days2001: Unhealthy for Sensitive Groups 24 of 365 days2001: Unhealthy 7 of 365 days2002: Good 147 of 365 days2002: Moderate 181 of 365 days2002: Unhealthy for Sensitive Groups 23 of 365 days2002: Unhealthy 13 of 365 days2002: Very Unhealthy 1 of 365 days2003: Good 157 of 365 days2003: Moderate 198 of 365 days2003: Unhealthy for Sensitive Groups 8 of 365 days2003: Unhealthy 2 of 365 days2004: Good 174 of 366 days2004: Moderate 185 of 366 days2004: Unhealthy for Sensitive Groups 7 of 366 days2005: Good 153 of 365 days2005: Moderate 189 of 365 days2005: Unhealthy for Sensitive Groups 21 of 365 days2005: Unhealthy 2 of 365 days20052006: Good 191 of 365 days2006: Moderate 166 of 365 days2006: Unhealthy for Sensitive Groups 8 of 365 days2007: Good 192 of 365 days2007: Moderate 158 of 365 days2007: Unhealthy for Sensitive Groups 15 of 365 days2008: Good 190 of 366 days2008: Moderate 165 of 366 days2008: Unhealthy for Sensitive Groups 9 of 366 days2008: Unhealthy 2 of 366 days2009: Good 205 of 365 days2009: Moderate 158 of 365 days2009: Unhealthy for Sensitive Groups 2 of 365 days2010: Good 208 of 365 days2010: Moderate 149 of 365 days2010: Unhealthy for Sensitive Groups 8 of 365 days20102011: Good 207 of 365 days2011: Moderate 153 of 365 days2011: Unhealthy for Sensitive Groups 5 of 365 days2012: Good 213 of 366 days2012: Moderate 149 of 366 days2012: Unhealthy for Sensitive Groups 4 of 366 days2013: Good 208 of 365 days2013: Moderate 156 of 365 days2013: Unhealthy for Sensitive Groups 1 of 365 days2014: Good 185 of 365 days2014: Moderate 180 of 365 days2015: Good 176 of 365 days2015: Moderate 186 of 365 days2015: Unhealthy for Sensitive Groups 3 of 365 days20152016: Good 236 of 366 days2016: Moderate 126 of 366 days2016: Unhealthy for Sensitive Groups 4 of 366 days2017: Good 222 of 365 days2017: Moderate 143 of 365 days2018: Good 248 of 365 days2018: Moderate 117 of 365 days2019: Good 309 of 365 days2019: Moderate 56 of 365 days2020: Good 295 of 366 days2020: Moderate 71 of 366 days20202021: Good 252 of 353 days2021: Moderate 100 of 353 days2021: Unhealthy for Sensitive Groups 1 of 353 days2022: Good 259 of 363 days2022: Moderate 104 of 363 days2023: Good 230 of 365 days2023: Moderate 127 of 365 days2023: Unhealthy for Sensitive Groups 3 of 365 days2023: Unhealthy 4 of 365 days2023: Very Unhealthy 1 of 365 days2024: Good 265 of 366 days2024: Moderate 101 of 366 days2025: Good 270 of 365 days2025: Moderate 92 of 365 days2025: Unhealthy for Sensitive Groups 3 of 365 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 year0501001501980: 90th percentile AQI 1401981: 90th percentile AQI 931982: 90th percentile AQI 871983: 90th percentile AQI 871984: 90th percentile AQI 901985: 90th percentile AQI 901986: 90th percentile AQI 741987: 90th percentile AQI 901988: 90th percentile AQI 1151989: 90th percentile AQI 811990: 90th percentile AQI 721991: 90th percentile AQI 1081992: 90th percentile AQI 641993: 90th percentile AQI 901994: 90th percentile AQI 901995: 90th percentile AQI 871996: 90th percentile AQI 711997: 90th percentile AQI 711998: 90th percentile AQI 901999: 90th percentile AQI 932000: 90th percentile AQI 802001: 90th percentile AQI 922002: 90th percentile AQI 1012003: 90th percentile AQI 802004: 90th percentile AQI 782005: 90th percentile AQI 892006: 90th percentile AQI 772007: 90th percentile AQI 842008: 90th percentile AQI 752009: 90th percentile AQI 682010: 90th percentile AQI 752011: 90th percentile AQI 682012: 90th percentile AQI 672013: 90th percentile AQI 672014: 90th percentile AQI 642015: 90th percentile AQI 742016: 90th percentile AQI 662017: 90th percentile AQI 612018: 90th percentile AQI 642019: 90th percentile AQI 532020: 90th percentile AQI 552021: 90th percentile AQI 602022: 90th percentile AQI 582023: 90th percentile AQI 642024: 90th percentile AQI 582025: 90th percentile AQI 601980: Median AQI 421981: Median AQI 421982: Median AQI 441983: Median AQI 391984: Median AQI 421985: Median AQI 461986: Median AQI 401987: Median AQI 421988: Median AQI 421989: Median AQI 441990: Median AQI 421991: Median AQI 421992: Median AQI 371993: Median AQI 411994: Median AQI 441995: Median AQI 391996: Median AQI 391997: Median AQI 391998: Median AQI 381999: Median AQI 462000: Median AQI 522001: Median AQI 552002: Median AQI 542003: Median AQI 542004: Median AQI 522005: Median AQI 552006: Median AQI 492007: Median AQI 492008: Median AQI 492009: Median AQI 472010: Median AQI 462011: Median AQI 482012: Median AQI 452013: Median AQI 462014: Median AQI 502015: Median AQI 512016: Median AQI 452017: Median AQI 452018: Median AQI 412019: Median AQI 392020: Median AQI 402021: Median AQI 402022: Median AQI 432023: Median AQI 442024: Median AQI 402025: Median AQI 391980198519901995200020052010201520202025
  • 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
Ozone23564%
Fine particles (PM2.5)12334%
Nitrogen dioxide (NO₂)72%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20253652709230003960117Ozone
20243662651010000405897Ozone
202336523012734104464292PM2.5
20223632591040000435874PM2.5
202135325210010004060137PM2.5
2020366295710000405583Ozone
2019365309560000395382Ozone
20183652481170000416496PM2.5
20173652221430000456191PM2.5
201636623612640004566129PM2.5
201536517618630005174108PM2.5
201436518518000005064100PM2.5
201336520815610004667101PM2.5
201236621314940004567136PM2.5
201136520715350004868109PM2.5
201036520814980004675140PM2.5
200936520515820004768112PM2.5
200836619016592004975185PM2.5
2007365192158150004984136PM2.5
200636519116680004977133PM2.5
2005365153189212005589159PM2.5
200436617418570005278133PM2.5
200336515719882005480172PM2.5
200236514718123131054101213PM2.5
2001365144190247005592169PM2.5
2000366169183131005280200PM2.5
19993651971362012004693187Ozone
199836528350266003890179Ozone
199736528458167003971185NO2
199636629454153003971177NO2
1995365280522310003987197NO2
199436524691235004490174NO2
199336527461246004190200Ozone
19923663124482003764166Ozone
1991365255702794042108215Ozone
199036527376124004272187NO2
1989365240104156004481192NO2
198836625961181711042115232Ozone
198736525878216204290214Ozone
198636529156153004074169Ozone
1985365227110253004690179NO2
198436626869236004290179Ozone
198336528255208003987187Ozone
19823652251101610404487245Ozone
198135924582275004293182Ozone
19803452336318238042140223Ozone

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 Pennsylvania with a similar median AQI in 2025

All monitored counties in Pennsylvania

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