AIR QUALITY MN

Air Quality in Monticello, MN: Moderate (59 AQI)

AQI 59 · Moderate · Ozone · Updated 2026-07-18

Monticello's air quality is moderate. Unusually sensitive people should consider reducing prolonged outdoor exertion.

Data: EPA AirNow, FEMA National Risk Index Last verified: 2026-07-18

Average AQI

Moderate

AQI Category

Unhealthy Days

Wildfire Risk

Mold Score

ZIP Codes

What is AQI?

The Air Quality Index (AQI) is a standardized scale from 0 to 500 that measures air pollution levels. 0-50 is "Good," 51-100 is "Moderate," 101-150 is "Unhealthy for Sensitive Groups," and above 150 is "Unhealthy" for everyone. AQI tracks five major pollutants: ground-level ozone, particulate matter (PM2.5 and PM10), carbon monoxide, sulfur dioxide, and nitrogen dioxide. Monticello's average AQI of 59 falls in the "Moderate" range.

How do wildfires affect air quality?

Wildfire smoke contains fine particulate matter (PM2.5) that can travel hundreds of miles and dramatically spike AQI readings. During fire season, even cities far from active fires can experience unhealthy air. HEPA air purifiers (rated for PM2.5) are the most effective indoor protection. Check AirNow.gov for real-time conditions during fire season.

Air Quality Map: Monticello, MN

Each dot represents a ZIP code. Color indicates AQI level. Tap a dot for details.

Good (0-50) Moderate (51-100) USG (101-150) Unhealthy (151+)

Air Quality by ZIP Code in Monticello

AQI varies across Monticello's 16 ZIP codes based on proximity to pollution sources and local geography.

ZIP Code	AQI	Category	Wildfire	Mold
55362	59	Moderate	25	43	View report →
55365	59	Moderate	25	55	View report →
55561	59	Moderate	25	55	View report →
55563	59	Moderate	25	55	View report →
55565	59	Moderate	25	55	View report →
55580	59	Moderate	25	55	View report →
55581	59	Moderate	25	55	View report →
55582	59	Moderate	25	55	View report →
55584	59	Moderate	25	55	View report →
55585	59	Moderate	25	55	View report →
55586	59	Moderate	25	55	View report →
55587	59	Moderate	25	55	View report →
55588	59	Moderate	25	55	View report →
55589	59	Moderate	25	55	View report →
55590	59	Moderate	25	55	View report →

Showing 15 of 16 ZIP codes. View all.

Air Quality Overview

Monticello, Minnesota has moderate air quality with an average AQI of 59. Air quality is acceptable, though some pollutants may be a concern for a small number of people who are unusually sensitive to air pollution. The dominant pollutant is Ozone.

The Air Quality Index (AQI) is an EPA-standardized scale from 0 to 500. Values below 50 are "Good," 51-100 "Moderate," 101-150 "Unhealthy for Sensitive Groups," 151-200 "Unhealthy," 201-300 "Very Unhealthy," and above 300 "Hazardous."

Dominant Pollutant: Ozone

Ground-level ozone forms when pollutants from cars, power plants, and industrial facilities react with sunlight. Unlike stratospheric ozone, ground-level ozone is harmful to breathe.

Health effects of ozone exposure:

Irritation of the respiratory system
Reduced lung function
Aggravation of asthma and chronic lung diseases
Increased susceptibility to respiratory infections

Peak times: Ozone levels are typically highest on hot, sunny afternoons. Exercise outdoors in the morning when levels are lower.

Air Quality by ZIP Code in Monticello

AQI varies across Monticello's 16 ZIP codes based on proximity to pollution sources, traffic patterns, and local geography:

ZIP Code	AQI	Category	Wildfire Risk	Mold Score
55362	59	Moderate	25	43
55365	59	Moderate	25	55
55561	59	Moderate	25	55
55563	59	Moderate	25	55
55565	59	Moderate	25	55
55580	59	Moderate	25	55
55581	59	Moderate	25	55
55582	59	Moderate	25	55
55584	59	Moderate	25	55
55585	59	Moderate	25	55
55586	59	Moderate	25	55
55587	59	Moderate	25	55
55588	59	Moderate	25	55
55589	59	Moderate	25	55
55590	59	Moderate	25	55

Showing 15 of 16 ZIP codes. Check your specific ZIP for detailed data.

Wildfire Smoke Risk

Monticello has an elevated wildfire smoke risk with an average smoke risk score of 25 (scale 0-100). There have been 176 fires recorded within 100 km of city ZIP codes.

Metric	Value
Avg. smoke risk score	25
Max smoke risk score	25
Fires within 100 km	176
High-risk ZIP codes	0

Wildfire smoke contains PM2.5, carbon monoxide, and volatile organic compounds. Even short-term exposure can trigger asthma attacks and respiratory distress.

Indoor Mold Risk

Monticello has an average mold risk score of 54 out of 100, with 15 ZIP codes in the high-risk category.

Factor	Value
Mold risk score	54/100
Average humidity	68% RH
High-risk ZIPs	15
Peak season	summer high

Mold risk is influenced by humidity levels, housing age (older homes have more moisture issues), flood history, and water infrastructure quality. Indoor humidity above 60% creates favorable conditions for mold growth.

Signs of mold problems: musty odors, visible growth on walls or ceilings, worsening allergies indoors, condensation on windows. Professional mold testing ($300-$600) can identify hidden issues.

Health Recommendations

With moderate air quality (AQI 59), most people can be active outdoors. Sensitive groups should take precautions:

Sensitive groups (asthma, COPD, heart disease): consider reducing prolonged outdoor exertion
Keep windows closed on high-pollution days
Use a HEPA air purifier in main living areas
Check AirNow.gov before outdoor exercise

Monticello vs. Nearby Minnesota Cities

How Monticello's air quality compares to nearby cities:

City	AQI	Category	Population
Monticello	59	Moderate	20,125
Grand Rapids	N/A	N/A	20,469
Fergus Falls	79	Moderate	19,650
South Saint Paul	65	Moderate	20,651

ZIP Codes in Monticello

Monticello covers 16 ZIP codes. Air quality can vary by neighborhood based on proximity to highways, industrial areas, and green spaces. Check your specific ZIP code for localized data.

Data Sources

Air quality: EPA AirNow - real-time and historical AQI data
Wildfire risk: FEMA National Risk Index
Mold risk: Derived from EPA, FEMA, Census ACS (humidity, housing age, flood history)
Monthly AQI: EPA Air Quality Statistics

Updated daily.

Frequently Asked Questions

Is the air safe to breathe in Monticello?

Monticello's average AQI is 59 (Moderate). Air quality is acceptable, but unusually sensitive individuals may experience respiratory symptoms during peak pollution times.

How many unhealthy air days does Monticello have?

Monticello experiences 32 unhealthy air quality days per year on average. During these days, everyone - not just sensitive groups - should reduce prolonged outdoor exertion.

What is the AQI in Monticello?

The average Air Quality Index (AQI) in Monticello is 59, categorized as Moderate. The primary pollutant is Ozone. AQI ranges from 0-500, where 0-50 is Good, 51-100 Moderate, 101-150 Unhealthy for Sensitive Groups, and 151+ Unhealthy.

What is the wildfire risk in Monticello?

Monticello has a wildfire risk score of 25 out of 100. Low wildfire risk means smoke events are uncommon, but regional fires can still temporarily affect air quality.

Is mold a concern in Monticello?

Monticello has a mold risk score of 54 out of 100, based on humidity, precipitation, and temperature data. Maintain good ventilation and address any water intrusion promptly to prevent mold growth.

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