Median AQI
20
Good
North Carolina · County air quality · 2025
Hyde County, North Carolina
Median AQI 20 (Good). 100.0% of monitored days rated Good, direct from EPA Air Quality System stations.
- 20
- Median AQI
- 100.0%
- Good-air days
- 0
- Unhealthy days
- 96%
- Cleaner than US counties
The verdict
According to EPA Air Quality System monitoring data, Hyde County's air is good on balance, among the cleanest 5% of US counties, a median AQI of 20 with 100.0% of 17 monitored days in the Good band, driven mainly by PM2.5.
- 20
- median AQI · Good
- 100.0%
- days rated Good
- PM2.5
- main pollutant
- 96%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 37.
Data updated July 2026
- Good · 17 d · 100.0%
How did Hyde County's air break down in 2025?
Across 17 monitored days, 17 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 37 (Good).
EPA AQS →Air quality data from EPA Air Quality System (2025). 17 days monitored. Median AQI: 20 (Good).
Insights: Hyde County, North Carolina. EPA monitors recorded a median Air Quality Index of 20 across 17 measured days in 2025, earning a Good classification and a Excellent health grade. Of those days, 17 (100%) fell in the Good band (AQI 0–50), 0 (0%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 36, while the worst single-day peak hit 37 (Good). Residents averaged about 30.0 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (17 days). Across the 2020–2025 trend window, good days shifted by -91 and the median AQI moved -1 points, placing the multi-year trajectory at improving. The worst single reading over the 2020–2025 window was AQI 37, good but never Unhealthy. Nearby counties show comparable readings: Alexander (92.4% good, AQI 39); Avery (93.9% good, AQI 38); Buncombe (71.4% good, AQI 42); Caldwell (96.2% good, AQI 37); Carteret (94.2% good, AQI 37); Caswell (94.6% good, AQI 39).
Air Quality Summary
Good Days
100.0%
17 of 17 monitored days
25.0pp vs 75% target
Max AQI Recorded
37
Good
Health Grade
Excellent
90th-pct AQI 36
Hyde County, Good days share 100.0%
National avg
Share of monitored days at AQI 0-50 (Good band).
Hyde 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 17 monitored days across EPA AQI categories.
Good
17
100%
Moderate
0
0%
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 Hyde County.
- PM2.5 · 17 days · 100.0%
Health Impact Assessment
Excellent
Hyde County's air quality is rated Excellent based on 100.0% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 100.0% of monitored days in 2025, with a median AQI of 20. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is PM2.5, driving AQI on 17 of 17 monitored days.
5-Year Air Quality Trend
Air quality is improving in Hyde County. Best year: 2022 (112 good days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 108 | 6 | 0 | 0 | 21 | 58 |
| 2021 | 102 | 5 | 0 | 0 | 22 | 56 |
| 2022 | 112 | 3 | 0 | 0 | 21 | 61 |
| 2023 | 103 | 13 | 0 | 0 | 26 | 65 |
| 2024 | 89 | 5 | 0 | 0 | 24 | 60 |
| 2025 | 17 | 0 | 0 | 0 | 20 | 37 |
How does Hyde County compare?
How Hyde County compares
Good-day share better than US avg
Hyde County 100.0%
Alexander County, North Carolina 92.4%
US average 76.5%
Median AQI better than US avg
Hyde County 20
Alexander County, North Carolina 39
US average 38
Unhealthy days / yr about average
Hyde County 0
Alexander County, North Carolina 0
US average 0
Other Counties in North Carolina
Air quality comparison for nearby counties in North Carolina.
Counties with Similar Air Quality
Counties across the US with a similar median AQI to Hyde County.
Cass County, Nebraska
AQI 20 · 96.5% good
Whitman County, Washington
AQI 20 · 93.8% good
Adams County, Washington
AQI 19 · 94.7% good
Bonneville County, Idaho
AQI 19 · 94.9% good
Cowlitz County, Washington
AQI 21 · 91.6% good
Elko County, Nevada
AQI 19 · 90.8% good
What Hyde County's air means for you
The air here stays in the breathable range year-round, with PM2.5 the main thing to watch.
- Sensitive groups (asthma, heart conditions, children, older adults) should check the AQI on high-PM2.5 days, the guide explains what a median of 20 means for exposure. Health guidance
- See how Hyde County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Hyde County with its North Carolina neighbours before drawing a conclusion about the region. All of North Carolina
Based on 17 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 Hyde County, North Carolina? ▼
Hyde County has a median Air Quality Index (AQI) of 20, rated "Good." 100.0% of monitored days (17 out of 17) had good air quality in 2025.
What is the main pollutant in Hyde County? ▼
The primary pollutant in Hyde County is Fine Particles (PM2.5), which was the main AQI driver on 17 days (100% of monitored days). Penetrates deep into lungs and bloodstream. Linked to heart disease and premature death.
How many unhealthy air days does Hyde County have? ▼
In 2025, Hyde County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 37.
Is the air quality in Hyde County getting better or worse? ▼
Air quality in Hyde County is improving based on 5-year trends (2020-2025). Best year: 2022 with 112 good days. Worst year: 2025 with 17 good days.
What does AQI 20 mean for health? ▼
Hyde County's median AQI of 20 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 Hyde County compare to other counties in North Carolina? ▼
Hyde County has 100.0% good air days. Nearby counties in North Carolina: Alexander (92.4% good), Avery (93.9% good), Buncombe (71.4% good), Caldwell (96.2% good), Carteret (94.2% good), Caswell (94.6% good).
What is the 90th percentile AQI in Hyde County? ▼
The 90th percentile AQI for Hyde County is 36, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 37 (Good).
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.