AIR QUALITY MI

Air Quality in Saginaw, MI: Good (42 AQI)

AQI 42 · Good · Ozone · Updated 2026-05-03

Saginaw's air quality is good. Air pollution poses little or no risk.

Data: EPA AirNow, FEMA National Risk Index Last verified: 2026-05-03

Average AQI

Good

AQI Category

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. Saginaw's average AQI of 42 falls in the "Good" 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: Saginaw, MI

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 Saginaw

AQI varies across Saginaw's 11 ZIP codes based on proximity to pollution sources and local geography.

ZIP Code	AQI	Category	Wildfire	Mold
48601	42	Good	21	69	View report →
48602	42	Good	21	69	View report →
48603	42	Good	21	55	View report →
48604	42	Good	21	63	View report →
48605	42	Good	21	40	View report →
48606	42	Good	21	40	View report →
48607	42	Good	21	57	View report →
48608	42	Good	21	44	View report →
48609	42	Good	21	61	View report →
48638	42	Good	21	61	View report →
48663	42	Good	21	40	View report →

Air Quality Overview

Saginaw, Michigan has good air quality with an average AQI of 42. This means air pollution poses little or no risk. The dominant pollutant measured 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 Saginaw

AQI varies across Saginaw's 11 ZIP codes based on proximity to pollution sources, traffic patterns, and local geography:

ZIP Code	AQI	Category	Wildfire Risk	Mold Score
48601	42	Good	21	69
48602	42	Good	21	69
48603	42	Good	21	55
48604	42	Good	21	63
48605	42	Good	21	40
48606	42	Good	21	40
48607	42	Good	21	57
48608	42	Good	21	44
48609	42	Good	21	61
48638	42	Good	21	61
48663	42	Good	21	40

Wildfire Smoke Risk

Saginaw has an elevated wildfire smoke risk with an average smoke risk score of 21 (scale 0-100). There have been 11 fires recorded within 100 km of city ZIP codes.

Metric	Value
Avg. smoke risk score	21
Max smoke risk score	21
Fires within 100 km	11
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

Saginaw has an average mold risk score of 54 out of 100, with 7 ZIP codes in the high-risk category.

Factor	Value
Mold risk score	54/100
Average humidity	70% RH
High-risk ZIPs	7
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 good air quality (AQI 42), Saginaw residents can enjoy outdoor activities without significant restrictions. General tips:

Monitor AQI during wildfire season for temporary spikes
Use HEPA air purifiers indoors if you have respiratory conditions
Maintain indoor humidity between 30-50% to prevent mold

Saginaw vs. Nearby Michigan Cities

How Saginaw's air quality compares to nearby cities:

City	AQI	Category	Population
Saginaw	42	Good	111,608
Dearborn	105	USG	109,976
Wayne	105	USG	101,687
Clinton Township	N/A	N/A	100,786

ZIP Codes in Saginaw

Saginaw covers 11 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 Saginaw?

Yes — Saginaw's average AQI is 42 (Good). Air pollution poses little or no risk for the general population.

How many unhealthy air days does Saginaw have?

Saginaw has zero recorded unhealthy air quality days, which is excellent. Air quality can still vary seasonally due to wildfire smoke, pollen, or industrial activity.

What is the AQI in Saginaw?

The average Air Quality Index (AQI) in Saginaw is 42, categorized as Good. 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 Saginaw?

Saginaw has a wildfire risk score of 21 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 Saginaw?

Saginaw 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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