Median AQI
43
Good
Pennsylvania · County air quality · 2025
Lycoming County, Pennsylvania
Median AQI 43 (Good). 73.4% of monitored days rated Good, direct from EPA Air Quality System stations.
- 43
- Median AQI
- 73.4%
- Good-air days
- 0
- Unhealthy days
- 38%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Lycoming County's air is good on balance, more polluted than the median US county, a median AQI of 43 with 73.4% of 207 monitored days in the Good band, driven mainly by Ozone.
- 43
- median AQI · Good
- 73.4%
- days rated Good
- Ozone
- main pollutant
- 38%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 105.
Data updated July 2026
- Good · 152 d · 73.4%
- Moderate · 54 d · 26.1%
- USG · 1 d · 0.5%
How did Lycoming County's air break down in 2025?
Across 207 monitored days, 152 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 105 (USG).
EPA AQS →Air quality data from EPA Air Quality System (2025). 207 days monitored. Median AQI: 43 (Good).
Insights: Lycoming County, Pennsylvania. EPA monitors recorded a median Air Quality Index of 43 across 207 measured days in 2025, earning a Good classification and a Moderate health grade. Of those days, 152 (73%) fell in the Good band (AQI 0–50), 54 (26%) registered Moderate readings, and 1 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 62, while the worst single-day peak hit 105 (USG). Residents averaged about 22.0 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as Ozone (115 days), PM2.5 (92 days). Across the 2020–2025 trend window, good days shifted by -131 and the median AQI moved +2 points, placing the multi-year trajectory at worsening. The worst single reading over the 2020–2025 window was AQI 105, usg but never Unhealthy. Nearby counties show comparable readings: Adams (73.8% good, AQI 42); Allegheny (51.6% good, AQI 49); Armstrong (68.1% good, AQI 42); Beaver (54.3% good, AQI 47); Berks (65.6% good, AQI 44); Blair (71.9% good, AQI 41).
Air Quality Summary
Good Days
73.4%
152 of 207 monitored days
-1.6pp vs 75% target
Max AQI Recorded
105
USG
Health Grade
Moderate
90th-pct AQI 62
Lycoming County, Good days share 73.4%
National avg
Share of monitored days at AQI 0-50 (Good band).
Lycoming County, Unhealthy-or-worse share 0.0%
National avg
Share of monitored days above AQI 150 (Unhealthy or worse). Bar maxes at 10% (worst-county ceiling).
AQI Day Breakdown (2025)
Distribution of 207 monitored days across EPA AQI categories.
Good
152
73%
Moderate
54
26%
USG
1
0%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Lycoming County.
- Ozone · 115 days · 55.6%
- PM2.5 · 92 days · 44.4%
Health Impact Assessment
Moderate
Lycoming County's air quality is rated Moderate based on 73.4% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 73.4% of monitored days in 2025, with a median AQI of 43. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is Ozone, driving AQI on 115 of 207 monitored days.
5-Year Air Quality Trend
Air quality is worsening in Lycoming County. Best year: 2020 (283 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 283 | 82 | 1 | 0 | 41 | 109 |
| 2021 | 221 | 132 | 1 | 0 | 44 | 111 |
| 2022 | 221 | 83 | 0 | 0 | 40 | 80 |
| 2023 | 242 | 38 | 3 | 0 | 38 | 119 |
| 2024 | 281 | 84 | 1 | 0 | 39 | 122 |
| 2025 | 152 | 54 | 1 | 0 | 43 | 105 |
How does Lycoming County compare?
How Lycoming County compares
Good-day share worse than US avg
Lycoming County 73.4%
Adams County, Pennsylvania 73.8%
US average 76.5%
Median AQI worse than US avg
Lycoming County 43
Adams County, Pennsylvania 42
US average 38
Unhealthy days / yr about average
Lycoming County 0
Adams County, Pennsylvania 0
US average 0
Other Counties in Pennsylvania
Air quality comparison for nearby counties in Pennsylvania.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Lycoming County.
Allegan County, Michigan
AQI 43 · 71.2% good
Allen County, Ohio
AQI 43 · 65.9% good
Ashtabula County, Ohio
AQI 43 · 81.2% good
Bell County, Kentucky
AQI 43 · 63.5% good
Boise County, Idaho
AQI 43 · 72.9% good
Brazos County, Texas
AQI 43 · 63.4% good
What Lycoming County's air means for you
The air here stays in the breathable range year-round, with Ozone the main thing to watch.
- Sensitive groups (asthma, heart conditions, children, older adults) should check the AQI on high-Ozone days, the guide explains what a median of 43 means for exposure. Health guidance
- See how Lycoming County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Lycoming County with its Pennsylvania neighbours before drawing a conclusion about the region. All of Pennsylvania
Based on 207 EPA-monitored days in 2025; figures reflect only days the monitors reported. Source: EPA Air Quality System annual summaries.
More Air Quality Data
Air Quality Guides
Frequently Asked Questions
What is the air quality in Lycoming County, Pennsylvania? ▼
Lycoming County has a median Air Quality Index (AQI) of 43, rated "Good." 73.4% of monitored days (152 out of 207) had good air quality in 2025.
What is the main pollutant in Lycoming County? ▼
The primary pollutant in Lycoming County is Ozone (O3), which was the main AQI driver on 115 days (56% of monitored days). Can trigger asthma, reduce lung function, and cause chest pain.
How many unhealthy air days does Lycoming County have? ▼
In 2025, Lycoming County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 105.
Is the air quality in Lycoming County getting better or worse? ▼
Air quality in Lycoming County is worsening based on 5-year trends (2020-2025). Best year: 2020 with 283 good days. Worst year: 2025 with 152 good days.
What does AQI 43 mean for health? ▼
Lycoming County's median AQI of 43 falls in the "Good" category. See the <a href="/guides/understanding-aqi" class="underline">AQI category guide</a> for what each range means for health.
How does Lycoming County compare to other counties in Pennsylvania? ▼
Lycoming County has 73.4% good air days. Nearby counties in Pennsylvania: Adams (73.8% good), Allegheny (51.6% good), Armstrong (68.1% good), Beaver (54.3% good), Berks (65.6% good), Blair (71.9% good).
What is the 90th percentile AQI in Lycoming County? ▼
The 90th percentile AQI for Lycoming County is 62, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 105 (USG).
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by County dataset, 2020–2025 (aqs.epa.gov). For current conditions (not shown here — this page is historical annual data), see EPA AirNow (airnow.gov). See our methodology for how AQI, median, and coverage figures are computed.
Informational only, not professional advice. Data from EPA AQS. See our disclaimer.
Every figure on PlainAir is rendered directly from EPA AQS air-quality monitoring data, no number is typed in by an editor. This page draws directly on EPA AQS air-quality monitoring data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.