Median AQI
37
Good
New York · County air quality · 2025
Rockland County, New York
Median AQI 37 (Good). 85.5% of monitored days rated Good, direct from EPA Air Quality System stations.
- 37
- Median AQI
- 85.5%
- Good-air days
- 0
- Unhealthy days
- 71%
- Cleaner than US counties
Rockland County's 2025 annual median AQI is 37 (Good), with 85.5% Good days
According to the U.S. EPA Air Quality System, Rockland County, New York posted a 2025 median AQI of 37 (Good) across 365 monitored days, with 85.5% rated Good and 0 unhealthy or worse. This is an annual comparison, not today's advisory.
Data source EPA Air Quality System (AQS)
- Cleaner than US
- Rockland County's 85.5% Good-day share places it cleaner than 71% of US counties in 2025.
- Closest median-AQI peer
- Alachua County (88.7% Good, median AQI 37) is the closest nationwide median-AQI peer to Rockland County.
- 2020–2025 trend
- Rockland County's floor-qualifying Good-day share is stable from 2020 to 2025 (87.2% → 85.5%).
- Median AQI
- Median AQI: 37
The verdict
According to EPA Air Quality System monitoring data, Rockland County's air is good on balance, cleaner than the median US county, a median AQI of 37 with 85.5% of 365 monitored days in the Good band, driven mainly by Ozone.
- 37
- median AQI · Good
- 85.5%
- days rated Good
- Ozone
- main pollutant
- 71%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 136.
Annual release change
What changed in the 2025 EPA annual release
- Rockland County's peak single-day AQI fell from 150 to 136 between the 2024 and 2025 EPA annual releases, a change of -14 points.
- Rockland County's Good-day share rose from 84.2% to 85.5% between the 2024 and 2025 EPA annual releases, a change of +1.3 percentage points.
Data updated August 2026
- Good · 312 d · 85.5%
- Moderate · 46 d · 12.6%
- USG · 7 d · 1.9%
How did Rockland County's air break down in 2025?
Across 365 monitored days, 312 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 136 (USG).
EPA AQS →Air quality data from EPA Air Quality System (2025). 365 days monitored. Median AQI: 37 (Good).
Insights: Rockland County, New York. EPA monitors recorded a median Air Quality Index of 37 across 365 measured days in 2025, earning a Good classification and a Good health grade. Of those days, 312 (85%) fell in the Good band (AQI 0–50), 46 (13%) registered Moderate readings, and 7 (2%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 56, while the worst single-day peak hit 136 (USG). Residents averaged about 25.6 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as Ozone (237 days), PM2.5 (128 days). Across the 2020–2025 trend window, the share of monitored days rated Good shifted by -1.7 points and the median AQI moved +1 points, placing the multi-year trajectory at stable. The worst single reading over the 2020–2025 window was AQI 136, usg but never Unhealthy. Nearby counties show comparable readings: Albany (68.5% good, AQI 39); Bronx (59.2% good, AQI 45); Chautauqua (89.0% good, AQI 36); Dutchess (94.0% good, AQI 34); Erie (63.8% good, AQI 44); Essex (83.8% good, AQI 41).
Air Quality Summary
Good Days
85.5%
312 of 365 monitored days
10.5pp vs 75% target
Max AQI Recorded
136
USG
Health Grade
Good
90th-pct AQI 56
Rockland County, Good days share 85.5%
National avg
Share of monitored days at AQI 0-50 (Good band).
Rockland 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 365 monitored days across EPA AQI categories.
Good
312
85%
Moderate
46
13%
USG
7
2%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Rockland County.
- Ozone · 237 days · 64.9%
- PM2.5 · 128 days · 35.1%
Health Impact Assessment
Good
Rockland County's air quality is rated Good based on 85.5% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 85.5% of monitored days in 2025, with a median AQI of 37. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is Ozone, driving AQI on 237 of 365 monitored days.
5-Year Air Quality Trend
Air quality is stable in Rockland County. Highest Good-day share: 2020 (87.2%, 319 of 366 monitored days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 319 | 47 | 0 | 0 | 36 | 93 |
| 2021 | 314 | 47 | 0 | 1 | 37 | 155 |
| 2022 | 315 | 50 | 0 | 0 | 38 | 90 |
| 2023 | 288 | 66 | 6 | 3 | 38 | 197 |
| 2024 | 308 | 53 | 5 | 0 | 37 | 150 |
| 2025 | 312 | 46 | 7 | 0 | 37 | 136 |
How does Rockland County compare?
How Rockland County compares
Good-day share better than US avg
Rockland County 85.5%
Alachua County, Florida 88.7%
US average 76.0%
Median AQI better than US avg
Rockland County 37
Alachua County, Florida 37
US average 39
Unhealthy days / yr better than US avg
Rockland County 0
Alachua County, Florida 0
US average 1
Counties with a similar median AQI
Nationwide peers within about the same annual median AQI as Rockland County (37), not geographic neighbors.
Alachua County, Florida
Median AQI 37 · 88.7% Good-day share
Arlington County, Virginia
Median AQI 37 · 87.4% Good-day share
Bennington County, Vermont
Median AQI 37 · 83.6% Good-day share
Boone County, Missouri
Median AQI 37 · 93.2% Good-day share
Bradford County, Pennsylvania
Median AQI 37 · 81.6% Good-day share
Brown County, Wisconsin
Median AQI 37 · 73.2% Good-day share
Same primary pollutant: Ozone
Ozone led the AQI on the most monitored days here. These peers share that driver and the closest Good-day share (a second relationship type beyond median-AQI neighbors).
Hampshire County, Massachusetts
85.5% Good-day share · median AQI 36
Johnson County, Texas
85.5% Good-day share · median AQI 37
Lancaster County, Nebraska
85.4% Good-day share · median AQI 37
Frederick County, Maryland
85.7% Good-day share · median AQI 41
Greene County, Ohio
85.3% Good-day share · median AQI 40
Knox County, Ohio
85.3% Good-day share · median AQI 39
New York counties on the map
Geographic containment only, other monitored counties in New York, independent of AQI or pollutant match.
What Rockland 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 37 means for exposure. Health guidance
- See how Rockland County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Rockland County with its New York neighbours before drawing a conclusion about the region. All of New York
Based on 365 EPA-monitored days in 2025; figures reflect only days the monitors reported. Source: EPA Air Quality System annual summaries.
Keep exploring the annual AQI record
Air-quality reading list
Frequently Asked Questions
What is the air quality in Rockland County, New York? ▼
Rockland County has a median Air Quality Index (AQI) of 37, rated "Good." 85.5% of monitored days (312 out of 365) had good air quality in 2025.
What is the main pollutant in Rockland County? ▼
The primary pollutant in Rockland County is Ozone (O3), which was the main AQI driver on 237 days (65% of monitored days). Can trigger asthma, reduce lung function, and cause chest pain.
How many unhealthy air days does Rockland County have? ▼
In 2025, Rockland County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 136.
Is the air quality in Rockland County getting better or worse? ▼
Air quality in Rockland County is stable across floor-qualifying years (2020-2025); years with fewer than 100 monitored days are excluded from that direction. Highest qualifying Good-day share: 2020 at 87.2% (319 of 366 days). Lowest qualifying Good-day share: 2023 at 79.3% (288 of 363 days).
What does AQI 37 mean for health? ▼
Rockland County's median AQI of 37 falls in the "Good" category. See the AQI category guide for what each range means for health.
How does Rockland County compare to other counties in New York? ▼
Rockland County has 85.5% good air days. Nearby counties in New York: Albany (68.5% good), Bronx (59.2% good), Chautauqua (89.0% good), Dutchess (94.0% good), Erie (63.8% good), Essex (83.8% good).
What is the 90th percentile AQI in Rockland County? ▼
The 90th percentile AQI for Rockland County is 56, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 136 (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. Spotted a figure that looks wrong? Report a correction.
Source: U.S. EPA Air Quality System (AQS) Annual AQI by county summary files for Rockland County, New York · 2020–2025
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Every figure on PlainAirData 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.