EnviroNearby

Lycoming County, Pennsylvania air quality history

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

77%
Good days in 2025
40
Median daily AQI, 2025
1
Days above 100 in 2025
364
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Lycoming, Pennsylvania on 364 days. 282 of those days (77%) were in the Good range, and the median daily AQI was 40. 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 227 days. Across the years with fuller monitoring, the share of Good days fell: an average of 84% in 1980–1982 versus 80% 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 116 of 142 days1980: Moderate 21 of 142 days1980: Unhealthy for Sensitive Groups 5 of 142 days19801981: Good 237 of 278 days1981: Moderate 32 of 278 days1981: Unhealthy for Sensitive Groups 6 of 278 days1981: Unhealthy 1 of 278 days1981: Very Unhealthy 2 of 278 days1982: Good 252 of 294 days1982: Moderate 22 of 294 days1982: Unhealthy for Sensitive Groups 14 of 294 days1982: Unhealthy 6 of 294 days1983: Good 250 of 294 days1983: Moderate 27 of 294 days1983: Unhealthy for Sensitive Groups 11 of 294 days1983: Unhealthy 6 of 294 days1984: Good 269 of 293 days1984: Moderate 18 of 293 days1984: Unhealthy for Sensitive Groups 4 of 293 days1984: Unhealthy 2 of 293 days1985: Good 286 of 341 days1985: Moderate 41 of 341 days1985: Unhealthy for Sensitive Groups 10 of 341 days1985: Unhealthy 3 of 341 days1985: Very Unhealthy 1 of 341 days19851986: Good 325 of 349 days1986: Moderate 22 of 349 days1986: Unhealthy for Sensitive Groups 2 of 349 days1987: Good 310 of 339 days1987: Moderate 24 of 339 days1987: Unhealthy for Sensitive Groups 5 of 339 days1988: Good 293 of 346 days1988: Moderate 26 of 346 days1988: Unhealthy for Sensitive Groups 12 of 346 days1988: Unhealthy 15 of 346 days1989: Good 346 of 362 days1989: Moderate 15 of 362 days1989: Unhealthy for Sensitive Groups 1 of 362 days1990: Good 331 of 357 days1990: Moderate 21 of 357 days1990: Unhealthy for Sensitive Groups 5 of 357 days19901991: Good 316 of 355 days1991: Moderate 27 of 355 days1991: Unhealthy for Sensitive Groups 9 of 355 days1991: Unhealthy 3 of 355 days1992: Good 349 of 365 days1992: Moderate 11 of 365 days1992: Unhealthy for Sensitive Groups 5 of 365 days1993: Good 318 of 357 days1993: Moderate 35 of 357 days1993: Unhealthy for Sensitive Groups 4 of 357 days1994: Good 200 of 238 days1994: Moderate 35 of 238 days1994: Unhealthy for Sensitive Groups 3 of 238 days1995: Good 196 of 233 days1995: Moderate 29 of 233 days1995: Unhealthy for Sensitive Groups 8 of 233 days19951996: Good 195 of 234 days1996: Moderate 33 of 234 days1996: Unhealthy for Sensitive Groups 4 of 234 days1996: Unhealthy 2 of 234 days1997: Good 205 of 235 days1997: Moderate 23 of 235 days1997: Unhealthy for Sensitive Groups 7 of 235 days1998: Good 159 of 213 days1998: Moderate 39 of 213 days1998: Unhealthy for Sensitive Groups 12 of 213 days1998: Unhealthy 3 of 213 days1999: Good 161 of 214 days1999: Moderate 42 of 214 days1999: Unhealthy for Sensitive Groups 11 of 214 days2000: Good 191 of 223 days2000: Moderate 27 of 223 days2000: Unhealthy for Sensitive Groups 4 of 223 days2000: Unhealthy 1 of 223 days20002001: Good 168 of 236 days2001: Moderate 54 of 236 days2001: Unhealthy for Sensitive Groups 12 of 236 days2001: Unhealthy 2 of 236 days2002: Good 159 of 238 days2002: Moderate 49 of 238 days2002: Unhealthy for Sensitive Groups 24 of 238 days2002: Unhealthy 5 of 238 days2002: Very Unhealthy 1 of 238 days2003: Good 185 of 239 days2003: Moderate 41 of 239 days2003: Unhealthy for Sensitive Groups 9 of 239 days2003: Unhealthy 4 of 239 days2004: Good 178 of 232 days2004: Moderate 47 of 232 days2004: Unhealthy for Sensitive Groups 7 of 232 days2005: Good 153 of 234 days2005: Moderate 57 of 234 days2005: Unhealthy for Sensitive Groups 22 of 234 days2005: Unhealthy 2 of 234 days20052006: Good 185 of 236 days2006: Moderate 46 of 236 days2006: Unhealthy for Sensitive Groups 5 of 236 days2007: Good 170 of 227 days2007: Moderate 46 of 227 days2007: Unhealthy for Sensitive Groups 11 of 227 days2008: Good 185 of 233 days2008: Moderate 41 of 233 days2008: Unhealthy for Sensitive Groups 5 of 233 days2008: Unhealthy 2 of 233 days2009: Good 219 of 236 days2009: Moderate 17 of 236 days2010: Good 176 of 229 days2010: Moderate 47 of 229 days2010: Unhealthy for Sensitive Groups 6 of 229 days20102011: Good 291 of 314 days2011: Moderate 22 of 314 days2011: Unhealthy for Sensitive Groups 1 of 314 days2012: Good 302 of 348 days2012: Moderate 42 of 348 days2012: Unhealthy for Sensitive Groups 4 of 348 days2013: Good 330 of 361 days2013: Moderate 31 of 361 days2014: Good 344 of 365 days2014: Moderate 21 of 365 days2015: Good 340 of 363 days2015: Moderate 23 of 363 days20152016: Good 335 of 366 days2016: Moderate 30 of 366 days2016: Unhealthy for Sensitive Groups 1 of 366 days2017: Good 343 of 364 days2017: Moderate 21 of 364 days2018: Good 327 of 345 days2018: Moderate 18 of 345 days2019: Good 322 of 361 days2019: Moderate 39 of 361 days2020: Good 283 of 366 days2020: Moderate 82 of 366 days2020: Unhealthy for Sensitive Groups 1 of 366 days20202021: Good 221 of 354 days2021: Moderate 132 of 354 days2021: Unhealthy for Sensitive Groups 1 of 354 days2022: Good 221 of 304 days2022: Moderate 83 of 304 days2023: Good 242 of 283 days2023: Moderate 38 of 283 days2023: Unhealthy for Sensitive Groups 3 of 283 days2024: Good 281 of 366 days2024: Moderate 84 of 366 days2024: Unhealthy for Sensitive Groups 1 of 366 days2025: Good 282 of 364 days2025: Moderate 81 of 364 days2025: Unhealthy for Sensitive Groups 1 of 364 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 801981: 90th percentile AQI 671982: 90th percentile AQI 771983: 90th percentile AQI 771984: 90th percentile AQI 471985: 90th percentile AQI 741986: 90th percentile AQI 481987: 90th percentile AQI 501988: 90th percentile AQI 841989: 90th percentile AQI 451990: 90th percentile AQI 481991: 90th percentile AQI 541992: 90th percentile AQI 441993: 90th percentile AQI 541994: 90th percentile AQI 581995: 90th percentile AQI 581996: 90th percentile AQI 711997: 90th percentile AQI 541998: 90th percentile AQI 801999: 90th percentile AQI 772000: 90th percentile AQI 612001: 90th percentile AQI 902002: 90th percentile AQI 1222003: 90th percentile AQI 802004: 90th percentile AQI 772005: 90th percentile AQI 1012006: 90th percentile AQI 712007: 90th percentile AQI 842008: 90th percentile AQI 672009: 90th percentile AQI 482010: 90th percentile AQI 712011: 90th percentile AQI 472012: 90th percentile AQI 582013: 90th percentile AQI 482014: 90th percentile AQI 472015: 90th percentile AQI 482016: 90th percentile AQI 492017: 90th percentile AQI 462018: 90th percentile AQI 442019: 90th percentile AQI 512020: 90th percentile AQI 562021: 90th percentile AQI 612022: 90th percentile AQI 572023: 90th percentile AQI 582024: 90th percentile AQI 612025: 90th percentile AQI 611980: Median AQI 311981: Median AQI 281982: Median AQI 291983: Median AQI 291984: Median AQI 281985: Median AQI 331986: Median AQI 291987: Median AQI 311988: Median AQI 291989: Median AQI 281990: Median AQI 271991: Median AQI 301992: Median AQI 271993: Median AQI 291994: Median AQI 361995: Median AQI 351996: Median AQI 391997: Median AQI 331998: Median AQI 441999: Median AQI 422000: Median AQI 362001: Median AQI 422002: Median AQI 442003: Median AQI 412004: Median AQI 412005: Median AQI 442006: Median AQI 392007: Median AQI 412008: Median AQI 392009: Median AQI 332010: Median AQI 402011: Median AQI 332012: Median AQI 332013: Median AQI 342014: Median AQI 352015: Median AQI 342016: Median AQI 342017: Median AQI 332018: Median AQI 312019: Median AQI 372020: Median AQI 412021: Median AQI 442022: Median AQI 402023: Median AQI 382024: Median AQI 392025: Median AQI 401980198519901995200020052010201520202025
  • 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
Ozone22762%
Fine particles (PM2.5)13738%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20253642828110004061105Ozone
20243662818410003961122Ozone
20232832423830003858119Ozone
2022304221830000405780PM2.5
202135422113210004461111PM2.5
20203662838210004156109Ozone
2019361322390000375177Ozone
2018345327180000314497Ozone
2017364343210000334684Ozone
20163663353010003449108Ozone
2015363340230000344887Ozone
2014365344210000354793Ozone
2013361330310000344897Ozone
20123483024240003358108Ozone
20113142912210003347101Ozone
20102291764760004071119Ozone
2009236219170000334897Ozone
20082331854152003967159Ozone
200722717046110004184143Ozone
20062361854650003971133Ozone
2005234153572220044101156Ozone
20042321784770004177143Ozone
20032391854194004180187Ozone
2002238159492451044122205Ozone
200123616854122004290156Ozone
20002231912741003661179Ozone
199921416142110004277140Ozone
199821315939123004480174Ozone
19972352052370003354133Ozone
19962341953342003971172Ozone
19952331962980003558143Ozone
19942382003530003658112Ozone
19933573183540002954133Ozone
19923653491150002744133Ozone
19913553162793003054172Ozone
19903573312150002748133Ozone
19893623461510002845122Ozone
1988346293261215002984197Ozone
19873393102450003150133Ozone
19863493252220002948140Ozone
198534128641103103374208Ozone
19842932691842002847177Ozone
198329425027116002977200Ozone
198229425222146002977195Ozone
19812782373261202867280Ozone
19801421162150003180143Ozone

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