Environmental hazards present risk for all homeowners throughout the U.S. Certain areas are well known for the risks they entail, but there are those ZIP codes that still fly under the radar for environmental hazards despite being hot spots. 

According to recent research by ATTOM Data Solutions, 17.3 million single-family homes and condominiums with a combined estimated market value of $4.9 trillion are in ZIP codes with high or very high risk for at least one of four environmental hazards:

  • Superfunds (sites contaminated with pollutants and other harmful substances)
  • Brownfields (properties that may have hazardous substances, pollutants or contaminants present)
  • Polluters
  • Poor air quality 

The 17.3 million single family homes and condos in high-risk ZIP codes represented 25 percent of the 68.1 million single-family homes and condos in the 8,642 ZIP codes analyzed. A risk index for each of the four environmental hazards was calculated for each of the 8,642 ZIP codes, and the indexes were each divided into five categories of risk:

  • Very low
  • Low
  • Moderate
  • High
  • Very high. 

For the report, ATTOM Data Solutions analyzed 8,642 U.S. ZIP codes with sufficient housing trend data for the four environmental hazards.

A housing risk index was calculated for each of the four types of hazards in each of the 8,642 areas. The maximum index value for each index was 250 and the minimum value was 0.

A combined environmental hazard index comprised of these four factors and with a maximum possible score of 1,000 was assigned to each ZIP code. The highest actual score for any one area was 455. Each individual natural hazard index accounted for 25 percent of the combined index.

Keep reading to find out which ZIP codes rank highest in overall environmental hazard housing risks. 

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Map of Tampa FL

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10. 33619 – Tampa, Florida 

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Overall risk Index: 285

2016 median sales prices: $88,000

Percentage seriously underwater: 27.5 percent

Foreclosure rate: 1.4 percent

Related: 5 factors to minimize home-related risks

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Map of Hamburg PA

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9. 19526 – Hamburg, Pennsylvania 

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Overall risk Index: 287

2016 median sales prices: $148,250

Percentage seriously underwater: 9.6 percent

Foreclosure rate: 0.7 percent

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Map of Mira Loma CA

(Source: Shutterstock) 

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8. 91752 – Mira Loma, California 

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Overall risk Index: 291

2016 median sales prices: $425,000

Percentage seriously underwater: 3.4 percent

Foreclosure rate: 0.3 percent

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 (Source: Shutterstock)

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7. 63133 – Saint Louis, Missouri

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Overall risk Index: 291

2016 median sales prices: $17,000 

Percentage seriously underwater: 45.4 percent

Foreclosure rate: 0.2 percent

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Niagara Falls NY

(Source: Shutterstock)

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6. 14303 – Niagara Falls, New York 

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Overall risk Index: 294

2016 median sales prices: $27,750

Percentage seriously underwater: 10.8 percent

Foreclosure rate: 0.2 percent

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Road sign Fresno CA

(Source: Shutterstock)

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5. 93725 – Fresno, California 

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Overall risk Index: 339

2016 median sales prices: $158,000

Percentage seriously underwater: 16.2 percent

Foreclosure rate: 0.4 percent

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Map of Santa Fe Springs CA

(Source: Shutterstock)

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4. 90670 – Santa Fe Springs, California 

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Overall risk Index: 356

2016 median sales prices: $435,000

Percentage seriously underwater: 3.4 percent

Foreclosure rate: 0.5 percent

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State flag of Maryland

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3. 21226 – Curtis Bay, Maryland 

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Overall risk Index: 380

2016 median sales prices: $153,822

Percentage seriously underwater: 14.4 percent

Foreclosure rate: 0.7 percent 

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San Bernardino CA road sign at sunset

(Source: Shutterstock)

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2. 92408 – San Bernardino, California

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Overall risk Index: 400

2016 median sales prices: $197,500

Percentage seriously underwater: 13.3 percent

Foreclosure rate: 0.6 percent 

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A colorful field of flowers in front of the State Capitol.

(Source: Shutterstock)

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1. 80216 – Denver, Colorado 

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Overall risk Index: 455

2016 median sales prices: $227,609

Percentage seriously underwater: 4.9 percent

Foreclosure rate: 0.2 percent 

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Denny Jacob

Denny Jacob is an associate editor for NU PropertyCasualty360. Contact him at [email protected].