AIR QUALITY OH

Air Quality in Lima, OH: Good (44 AQI)

AQI 44 · Good · Ozone · Updated 2026-05-03

Lima'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. Lima's average AQI of 44 falls in the "Good" range.

Air Quality Map: Lima, OH

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 Lima

AQI varies across Lima's 6 ZIP codes based on proximity to pollution sources and local geography.

ZIP Code	AQI	Category	Mold
45801	44	Good	67	View report →
45802	44	Good	46	View report →
45804	44	Good	64	View report →
45805	44	Good	64	View report →
45806	44	Good	59	View report →
45807	44	Good	59	View report →

Air Quality Overview

Lima, Ohio has good air quality with an average AQI of 44. 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 Lima

AQI varies across Lima's 6 ZIP codes based on proximity to pollution sources, traffic patterns, and local geography:

ZIP Code	AQI	Category	Mold Score
45801	44	Good	67
45802	44	Good	46
45804	44	Good	64
45805	44	Good	64
45806	44	Good	59
45807	44	Good	59

Wildfire Smoke Risk

Lima has a low wildfire smoke risk with an average smoke risk score of 0 (scale 0-100). However, smoke from distant wildfires can temporarily degrade air quality even in low-risk areas.

Metric	Value
Avg. smoke risk score	0
Max smoke risk score	0
Fires within 100 km	0
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

Lima has an average mold risk score of 60 out of 100, with 5 ZIP codes in the high-risk category.

Factor	Value
Mold risk score	60/100
Average humidity	70% RH
High-risk ZIPs	5
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 44), Lima 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

Lima vs. Nearby Ohio Cities

How Lima's air quality compares to nearby cities:

City	AQI	Category	Population
Lima	44	Good	65,769
Cairo	61	Moderate	65,619
Gomer	61	Moderate	65,619
Marion	N/A	N/A	67,152

ZIP Codes in Lima

Lima covers 6 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 Lima?

Yes — Lima's average AQI is 44 (Good). Air pollution poses little or no risk for the general population.

How many unhealthy air days does Lima have?

Lima 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 Lima?

The average Air Quality Index (AQI) in Lima is 44, 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.

Is mold a concern in Lima?

Lima has a mold risk score of 60 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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