Metro area air quality · 2025

Durango, CO

Median AQI 48 (Good). 60.8% of monitored days rated Good across this metro's EPA monitoring network.

48
Median AQI
60.8%
Good-air days
0
Unhealthy days
27%
Cleaner than US metros

Durango, CO posted a 2025 median AQI of 48 (Good) with 60.8% Good days

According to the U.S. EPA Air Quality System, the Durango, CO CBSA recorded a median AQI of 48 across 365 monitored days in 2025, with 60.8% rated Good and 0 unhealthy or worse. This is an annual metro comparison, not a live advisory.

Data source EPA Air Quality System (AQS)

Cleaner than US metros
The Durango, CO CBSA's 60.8% Good-day share places it cleaner than 27% of US metros in 2025.
Closest median-AQI peer
Baltimore-Columbia-Towson, MD (58.1% Good, median AQI 48) is the closest nationwide median-AQI peer to Durango, CO.
2020–2025 Good-day shift
Durango, CO's Good-day share moved -13.8 points from 2020 to 2025 (median AQI +3).
Median AQI
Median AQI: 48

Aggregated from EPA Air Quality System (2025), 365 monitored days. EPA AQS →

The verdict

Durango, CO lands in the lower Good-day tercile (60.8% Good), a thinner clean-air share than most CBSA peers here. On the EPA scale the metro runs good, more polluted than the median US metro, with a median AQI of 48 and 60.8% of 365 monitored days in the Good band.

48
median AQI · Good
60.8%
days rated Good
27%
cleaner than US metros
112
worst single reading

No day crossed into the Unhealthy tier across the metro's monitors in 2025.

Annual release change

What changed in the 2025 EPA annual release

2024 → 2025
  • Durango, CO metro's peak single-day AQI fell from 240 to 112 between the 2024 and 2025 EPA annual releases, a change of -128 points.
  • Durango, CO metro's Good-day share fell from 66.2% to 61.2% between the 2024 and 2025 EPA annual releases, a change of -5.1 percentage points.

Compared against 364 monitored days in 2024 and 363 in 2025. These are arithmetic differences between two stored EPA annual summaries, not a cause claim or a live advisory.

National release changes Two-year CSV

Durango, CO lands in the lower Good-day tercile (60.8% Good), a thinner clean-air share than most CBSA peers here. Signature read: 60.8% Good-day share (low tercile vs CBSA corpus). Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 48 over 365 measured days in 2025 (Good / Moderate). The monitored-day split lands at 222 Good (61%), 141 Moderate (39%), and 2 Unhealthy-for-Sensitive-Groups (1%). The 90th-percentile AQI finished at 74; the highest single-day reading hit 112 (USG).

Across 2020–2025, Good-day share shifted -13.8 points and median AQI moved +3 (worsening). No Unhealthy-tier days appear in this annual dataset. Metros with comparable AQI profiles include Baltimore-Columbia-Towson, MD (58.1% good, AQI 48); Boulder, CO (58.4% good, AQI 48); Columbus, GA-AL (53.4% good, AQI 48).

Health effects of air pollution →

Air Quality Summary

Median AQI

48

Good

Good Days

60.8%

222 of 365 days

Max AQI

112

USG

Health Grade

Moderate

90th pct: 74

AQI Day Breakdown (2025)

Distribution of 365 monitored days across EPA AQI categories.

Good

222

61%

Moderate

141

39%

USG

2

1%

Unhealthy

0

0%

Very Unhealthy

0

0%

Hazardous

0

0%

Health Impact Assessment

Moderate

The Durango, CO metro area's air quality is rated Moderate based on 60.8% good air days. No unhealthy air days were recorded in 2025.

Air quality is generally acceptable. Unusually sensitive people should monitor real-time conditions at AirNow.gov during high-pollution events.

How does the Durango, CO metro compare?

How Durango, CO compares

Good-day share worse than typical
Durango, CO 60.8%
Baltimore-Columbia-Towson, MD 58.1%
Typical US metro 70.6%
Median AQI worse than typical
Durango, CO 48
Baltimore-Columbia-Towson, MD 48
Typical US metro 41
Unhealthy days / yr better than typical
Durango, CO 0
Baltimore-Columbia-Towson, MD 0
Typical US metro 1

5-Year Air Quality Trend

Air quality is worsening in the Durango, CO metro. Highest Good-day share: 2020 (75.0%, 273 of 364 monitored days).

Year Good Moderate Unhealthy Median AQI
2020 273 91 0 45
2021 239 121 0 47
2022 266 98 0 46
2023 237 123 2 46
2024 241 123 0 46
2025 222 141 0 48

Metros with a similar median AQI

CBSA peers nationwide whose annual median AQI sits near Durango, CO (48).

Baltimore-Columbia-Towson, MD

Median AQI 48 · 58.1% Good-day share

48

Boulder, CO

Median AQI 48 · 58.4% Good-day share

48

Columbus, GA-AL

Median AQI 48 · 53.4% Good-day share

48

Greenville-Anderson-Mauldin, SC

Median AQI 48 · 55.3% Good-day share

48

Knoxville, TN

Median AQI 48 · 56.4% Good-day share

48

Lake City, FL

Median AQI 48 · 57.3% Good-day share

48

Metros with similar unhealthy-day exposure

A second relationship type: metros whose unhealthy-or-worse day count is closest to Durango, CO's 0 (independent of median AQI).

Aberdeen, SD

0 unhealthy-or-worse days · median AQI 27

27

Aberdeen, WA

0 unhealthy-or-worse days · median AQI 22

22

Adrian, MI

0 unhealthy-or-worse days · median AQI 41

41

Akron, OH

0 unhealthy-or-worse days · median AQI 45

45

Albany, GA

0 unhealthy-or-worse days · median AQI 46

46

Albany, OR

0 unhealthy-or-worse days · median AQI 27

27

Frequently Asked Questions

How many unhealthy air days does Durango, CO have? ▼
In 2025, the Durango, CO metro area recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 112.
What is the air quality in the Durango, CO metro area? ▼
The Durango, CO metro area has a median Air Quality Index (AQI) of 48, rated "Good." 60.8% of monitored days (222 out of 365) had good air quality in 2025.
Is air quality in Durango, CO getting better or worse? ▼
Air quality in the Durango, CO metro is worsening 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 75.0% (273 of 364 days). Lowest qualifying Good-day share: 2025 at 61.2% (222 of 363 days).
What does AQI 48 mean for health? ▼
An AQI of 48 is "Good", air quality is satisfactory and poses little or no health risk. This is the best category on the EPA's AQI scale.
How does Durango, CO compare to other metro areas? ▼
The Durango, CO metro has 60.8% good air days. Similar metros: Baltimore-Columbia-Towson, MD (58.1% good), Boulder, CO (58.4% good), Columbus, GA-AL (53.4% good).
What is the 90th percentile AQI for Durango, CO? ▼
The 90th percentile AQI for the Durango, CO metro area is 74, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 112 (USG).

Data Sources

Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by CBSA dataset for Durango, CO, 2025. See our methodology for how AQI, median, and coverage figures are computed.

Read our methodology , how this data is sourced, computed, and verified.

Source: U.S. EPA Air Quality System (AQS) Annual AQI by CBSA summary, Durango, CO · 2020–2025