Metro area air quality · 2024
Ashtabula, OH
Median AQI 41 (Good). 83.7% of monitored days rated Good across this metro's EPA monitoring network.
- 41
- Median AQI
- 83.7%
- Good-air days
- 0
- Unhealthy days
- 73%
- Cleaner than US metros
Aggregated from EPA Air Quality System (2024), 245 monitored days. EPA AQS →
The verdict
The Ashtabula, OH metro runs good on the EPA scale — a median AQI of 41 with 83.7% of 245 monitored days in the Good band.
- 41
- median AQI · Good
- 83.7%
- days rated Good
- 73%
- cleaner than US metros
- 108
- worst single reading
No day crossed into the Unhealthy tier across the metro's monitors in 2024.
Insights: Ashtabula, OH metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 41 over 245 measured days in 2024, which corresponds to a Good band and a Good metro-wide health grade. The monitored-day split lands at 205 Good days (84%), 38 Moderate (16%), and 2 Unhealthy-for-Sensitive-Groups (1%). The 90th-percentile AQI finished at 61 while the highest single-day reading hit 108 (USG). Metro residents averaged roughly 25.1 clean-air days per 30-day window across the reporting year.
Across the 2020–2024 trend window, good days shifted by -19 and the median AQI moved +4 points, which classifies the multi-year trajectory as worsening. The metro avoided any Unhealthy-tier days entirely, an outcome that typically reflects favorable wind patterns, lower industrial density, or effective regional emission controls. Metros with comparable AQI profiles include Allentown-Bethlehem-Easton, PA-NJ (68.3% good, AQI 41); Bowling Green, KY (76.8% good, AQI 41); Dalton, GA (84.5% good, AQI 41).
Air Quality Summary
Median AQI
41
Good
Good Days
83.7%
205 of 245 days
Max AQI
108
USG
Health Grade
Good
90th pct: 61
AQI Day Breakdown (2024)
Distribution of 245 monitored days across EPA AQI categories.
Good
205
84%
Moderate
38
16%
USG
2
1%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Health Impact Assessment
The Ashtabula, OH metro area's air quality is rated Good based on 83.7% good air days. No unhealthy air days were recorded in 2024.
Air quality is generally acceptable. Unusually sensitive people should monitor real-time conditions at AirNow.gov during high-pollution events.
How does the Ashtabula, OH metro compare?
How Ashtabula, OH compares
5-Year Air Quality Trend
Air quality is worsening in the Ashtabula, OH metro. Best year: 2020 (224 good days).
| Year | Good | Moderate | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|
| 2020 | 224 | 17 | 0 | 37 | 93 |
| 2021 | 213 | 28 | 0 | 38 | 112 |
| 2022 | 211 | 23 | 0 | 38 | 133 |
| 2023 | 208 | 35 | 0 | 42 | 147 |
| 2024 | 205 | 38 | 0 | 41 | 108 |
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Frequently Asked Questions
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Is air quality in Ashtabula, OH getting better or worse? ▼
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Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset, 2020–2024. The AQS collects ambient air monitoring data from state, local, and tribal monitoring agencies across the United States.
Metrics: Air Quality Index (AQI) is calculated using EPA-standard breakpoints for six criteria pollutants: PM2.5, PM10, Ozone, NO2, CO, and SO2. Median AQI, max AQI, and 90th percentile AQI are computed from daily measurements. Good days percentage reflects days with AQI 0–50.
Coverage: 501 metro areas (Core Based Statistical Areas). Only metros with active monitoring stations are included. Unmonitored areas are not represented.
Read our methodology , how this data is sourced, computed, and verified.
Source: U.S. EPA Air Quality System (AQS) Annual AQI by CBSA summary files (metro-level) · 2020–2024