Mold Impact Across Cities and States in the U.S.

Mold is a common issue in homes across the United States, but certain regions are more susceptible to mold growth due to environmental factors such as humidity, temperature, and precipitation. This can have significant implications for individuals with mold allergies and sensitivities. Here we explore the cities and states most impacted by mold and provide insights into the prevalence of mold allergies in these areas.

States with High Mold Exposure

California, Ohio, and Texas stand out as states with a notable impact from mold. These states have been identified through a study by Quest Diagnostics, which analyzed the prevalence of mold allergies among residents. The southwestern United States, in particular, has been highlighted as a region with a high concentration of mold allergens, with cities like Dallas and Riverside-San Bernardino experiencing significant rates of mold sensitization among allergy patients.

Top Cities for Mold Sensitization

The cities with the highest percentages of allergy patients showing sensitization to mold include:

1. Dallas, Texas – 21%
2. Riverside-San Bernardino, California – 20%
3. Phoenix, Arizona – 19%
4. Los Angeles, California – 17%
5. Chicago, Illinois – 17%
6. Minneapolis-St. Paul, Minnesota – 16%
7. Saint Louis, Missouri – 16%
8. Denver, Colorado – 16%
9. Kansas City, Missouri/Kansas – 16%
10. San Antonio, Texas – 15%

These cities are not only the worst for mold allergy sufferers but also indicate the broader issue of mold exposure that can affect overall indoor air quality and health.

Other States with Notable Mold Prevalence

Additional states like Florida, Oklahoma, South Carolina, Nevada, Arizona, South Dakota, Tennessee, and Kansas also face challenges with mold due to their climatic conditions. High humidity and significant rainfall contribute to the growth and spread of mold in these regions.

Seasonal Variations in Mold Levels

Mold levels tend to rise during the warmer months when humidity levels are higher, making mold a year-round concern with peaks during specific seasons. This is particularly true in states with hot and humid summers or those prone to natural disasters like floods, which can create ideal conditions for mold to thrive.

Mitigating Mold in Homes

For homeowners concerned about mold, it is crucial to be vigilant and proactive in identifying potential mold growth. A  home inspection checklist, like the one provided in the MoldCo Home & Health Guide, can help residents spot signs of mold and take necessary actions to address it. Key areas to monitor include basements, attics, bathrooms, and any spaces with poor ventilation or water damage.

Conclusion

While mold can grow in any state, certain areas are more impacted due to environmental factors. Awareness and early detection are key to preventing mold-related health issues. Homeowners should maintain low humidity levels, promptly address water leaks, and ensure proper ventilation to mitigate the risk of mold growth. For those with mold allergies, understanding the prevalence of mold in their region can help in managing their condition and improving their quality of life.