Median AQI
41
Good
Virginia · County air quality · 2025
Henrico County, Virginia
Median AQI 41 (Good). 73.1% of monitored days rated Good, direct from EPA Air Quality System stations.
- 41
- Median AQI
- 73.1%
- Good-air days
- 0
- Unhealthy days
- 37%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Henrico County's air is good on balance, more polluted than the median US county, a median AQI of 41 with 73.1% of 283 monitored days in the Good band, driven mainly by Ozone.
- 41
- median AQI · Good
- 73.1%
- days rated Good
- Ozone
- main pollutant
- 37%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 85.
Data updated July 2026
- Good · 207 d · 73.1%
- Moderate · 76 d · 26.9%
How did Henrico County's air break down in 2025?
Across 283 monitored days, 207 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 85 (Moderate).
EPA AQS →Air quality data from EPA Air Quality System (2025). 283 days monitored. Median AQI: 41 (Good).
Insights: Henrico County, Virginia. EPA monitors recorded a median Air Quality Index of 41 across 283 measured days in 2025, earning a Good classification and a Moderate health grade. Of those days, 207 (73%) fell in the Good band (AQI 0–50), 76 (27%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 56, while the worst single-day peak hit 85 (Moderate). Residents averaged about 21.9 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as Ozone (147 days), PM2.5 (136 days). Across the 2020–2025 trend window, good days shifted by -80 and the median AQI moved +0 points, placing the multi-year trajectory at worsening. The worst single reading over the 2020–2025 window was AQI 85, moderate but never Unhealthy. Nearby counties show comparable readings: Albemarle (77.9% good, AQI 41); Arlington (84.8% good, AQI 40); Bristol City (78.3% good, AQI 33); Caroline (96.2% good, AQI 37); Carroll (100.0% good, AQI 9); Charles (88.6% good, AQI 38).
Air Quality Summary
Good Days
73.1%
207 of 283 monitored days
-1.9pp vs 75% target
Max AQI Recorded
85
Moderate
Health Grade
Moderate
90th-pct AQI 56
Henrico County, Good days share 73.1%
National avg
Share of monitored days at AQI 0-50 (Good band).
Henrico 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 283 monitored days across EPA AQI categories.
Good
207
73%
Moderate
76
27%
USG
0
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 Henrico County.
- Ozone · 147 days · 51.9%
- PM2.5 · 136 days · 48.1%
Health Impact Assessment
Moderate
Henrico County's air quality is rated Moderate based on 73.1% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 73.1% of monitored days in 2025, with a median AQI of 41. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is Ozone, driving AQI on 147 of 283 monitored days.
5-Year Air Quality Trend
Air quality is worsening in Henrico County. Best year: 2024 (289 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 287 | 79 | 0 | 0 | 41 | 71 |
| 2021 | 221 | 141 | 1 | 0 | 44 | 112 |
| 2022 | 235 | 128 | 1 | 0 | 45 | 112 |
| 2023 | 221 | 140 | 3 | 1 | 46 | 159 |
| 2024 | 289 | 76 | 1 | 0 | 41 | 112 |
| 2025 | 207 | 76 | 0 | 0 | 41 | 85 |
How does Henrico County compare?
How Henrico County compares
Good-day share worse than US avg
Henrico County 73.1%
Albemarle County, Virginia 77.9%
US average 76.5%
Median AQI worse than US avg
Henrico County 41
Albemarle County, Virginia 41
US average 38
Unhealthy days / yr about average
Henrico County 0
Albemarle County, Virginia 0
US average 0
Other Counties in Virginia
Air quality comparison for nearby counties in Virginia.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Henrico County.
Albemarle County, Virginia
AQI 41 · 77.9% good
Anderson County, South Carolina
AQI 41 · 90.0% good
Berkshire County, Massachusetts
AQI 41 · 71.6% good
Berrien County, Michigan
AQI 41 · 80.9% good
Blair County, Pennsylvania
AQI 41 · 71.9% good
Bonner County, Idaho
AQI 41 · 71.3% good
What Henrico 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 41 means for exposure. Health guidance
- See how Henrico County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Henrico County with its Virginia neighbours before drawing a conclusion about the region. All of Virginia
Based on 283 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 Henrico County, Virginia? ▼
Henrico County has a median Air Quality Index (AQI) of 41, rated "Good." 73.1% of monitored days (207 out of 283) had good air quality in 2025.
What is the main pollutant in Henrico County? ▼
The primary pollutant in Henrico County is Ozone (O3), which was the main AQI driver on 147 days (52% of monitored days). Can trigger asthma, reduce lung function, and cause chest pain.
How many unhealthy air days does Henrico County have? ▼
In 2025, Henrico County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 85.
Is the air quality in Henrico County getting better or worse? ▼
Air quality in Henrico County is worsening based on 5-year trends (2020-2025). Best year: 2024 with 289 good days. Worst year: 2025 with 207 good days.
What does AQI 41 mean for health? ▼
Henrico County's median AQI of 41 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 Henrico County compare to other counties in Virginia? ▼
Henrico County has 73.1% good air days. Nearby counties in Virginia: Albemarle (77.9% good), Arlington (84.8% good), Bristol City (78.3% good), Caroline (96.2% good), Carroll (100.0% good), Charles (88.6% good).
What is the 90th percentile AQI in Henrico County? ▼
The 90th percentile AQI for Henrico County is 56, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 85 (Moderate).
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.