Kooskia, Idaho Air Quality
Kooskia has a median AQI of 39, earning an air quality grade of A — excellent air quality that ranks better than 65% of US cities. Air quality has remained relatively stable over the past decade. Ground-level ozone is the primary concern, typically peaking on warm sunny days due to vehicle and industrial emissions. In 2025, Kooskia recorded 194 good air quality days (80% of monitored days).
Population: 687 • County: Idaho
Current AQI
Quick Facts
| Current AQI | 57 — Moderate |
| Air Quality Grade | A |
| Median AQI (2025) | 39 |
| vs. U.S. Cities | Better than 65% |
| Primary Pollutant | Ozone |
| Unhealthy Days/Year | 0 |
| 10-Year Trend | → Stable |
| Data Source | EPA AQS (historical) · AirNow (live) |
Health Recommendation
Air quality is acceptable. However, there may be a risk for some people who are unusually sensitive to air pollution.
Unusually sensitive people should consider reducing prolonged or heavy outdoor exertion.
5-Day AQI Forecast
Last 90 Days
Current Pollutant Levels
Real-time data from EPA AirNow
Local Air Quality Context
Air quality data for Kooskia is sourced from the Kamiah monitoring area, located approximately 5 miles from city center. This EPA-certified station continuously tracks ground-level ozone, the primary driver of air quality alerts in this area.
Wildfire smoke is a significant factor in Kooskia's air quality, with regional fires capable of pushing AQI from Good to Unhealthy within hours during fire season (typically July through October). On smoke-impacted days, staying indoors with windows closed and running an air purifier with a HEPA filter is the most effective protection.
AQI Trend (10 Years)
Air Quality Days by Year
Kooskia Median AQI by Year
Annual EPA air quality data for Kooskia — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2025 | 39 | 194 | — | 84 | Ozone |
| 2024 | 42 | 237 | 8 | 217 | PM2.5 |
| 2023 | 44 | 233 | — | 98 | PM2.5 |
| 2022 | 41 | 242 | 10 | 263 | PM2.5 |
| 2021 | 42 | 237 | 16 | 188 | Ozone |
| 2020 | 40 | 244 | 9 | 209 | PM2.5 |
| 2019 | 44 | 236 | — | 89 | PM2.5 |
| 2018 | 43 | 248 | 2 | 134 | PM2.5 |
| 2017 | 44 | 236 | 17 | 304 | PM2.5 |
| 2016 | 39 | 268 | — | 82 | PM2.5 |
Source: EPA Air Quality System (AQS) annual summaries. "Unhealthy Days" includes Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous categories.
2025 Air Quality Summary
Primary Pollutant Days (2025)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Kooskia Air Quality
What is the air quality in Kooskia today?
The current AQI in Kooskia is 57, rated "Moderate". Air quality is moderate — unusually sensitive individuals may want to limit prolonged outdoor exertion. Air quality is acceptable. However, there may be a risk for some people who are unusually sensitive to air pollution.
Is air quality in Kooskia getting better or worse?
Air quality in Kooskia has been stable. The median AQI has remained stable at around 39 over the past decade.
What is the most common air pollutant in Kooskia?
Ozone is the primary air pollutant in Kooskia, responsible for 155 days (64% of monitored days) in 2025. Ground-level ozone forms when sunlight reacts with emissions from vehicles and industry, typically peaking on hot summer afternoons.
How many unhealthy air days does Kooskia have per year?
In 2025, Kooskia recorded 80% good air quality days (194 days) out of 243 monitored days. There were 0 Unhealthy for Sensitive Groups days and 0 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 84.
What air quality grade does Kooskia receive?
Kooskia receives an air quality grade of A, placing it better than 65% of US cities. This is based on a median AQI of 39 in 2025, with 194 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 65% of US cities
Nearby Cities
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National Rankings
See how Kooskia compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Kooskia
Ozone is Kooskia's primary pollutant. Standard HEPA filters don't capture ozone molecules — you need activated carbon or PECO technology to chemically break them down. We highlight those units here.
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Molekule Air Pro
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