Risky reservoirs: New Jersey counties where aging dams pose the greatest threat

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- Total high-hazard dams: 15
- Number potentially dangerous: 1 (6.7%)
- Potentially dangerous dams include:
--- 1 in poor condition

#14. Warren County
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- Total high-hazard dams: 40
- Number potentially dangerous: 5 (12.5%)
- Potentially dangerous dams include:
--- 5 in poor condition

#13. Sussex County
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- Total high-hazard dams: 7
- Number potentially dangerous: 1 (14.3%)
- Potentially dangerous dams include:
--- 1 in poor condition

#12. Bergen County
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- Total high-hazard dams: 49
- Number potentially dangerous: 8 (16.3%)
- Potentially dangerous dams include:
--- 8 in poor condition

#11. Passaic County
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- Total high-hazard dams: 10
- Number potentially dangerous: 2 (20.0%)
- Potentially dangerous dams include:
--- 2 in poor condition

#10. Burlington County
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- Total high-hazard dams: 4
- Number potentially dangerous: 1 (25.0%)
- Potentially dangerous dams include:
--- 1 in poor condition

#9. Cumberland County
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- Total high-hazard dams: 8
- Number potentially dangerous: 2 (25.0%)
- Potentially dangerous dams include:
--- 2 in poor condition

#8. Mercer County
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- Total high-hazard dams: 42
- Number potentially dangerous: 11 (26.2%)
- Potentially dangerous dams include:
--- 11 in poor condition

#7. Morris County
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- Total high-hazard dams: 12
- Number potentially dangerous: 4 (33.3%)
- Potentially dangerous dams include:
--- 4 in poor condition

#6. Monmouth County
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- Total high-hazard dams: 5
- Number potentially dangerous: 2 (40.0%)
- Potentially dangerous dams include:
--- 2 in poor condition

#5. Somerset County
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- Total high-hazard dams: 10
- Number potentially dangerous: 6 (60.0%)
- Potentially dangerous dams include:
--- 6 in poor condition

#4. Hunterdon County
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- Total high-hazard dams: 3
- Number potentially dangerous: 2 (66.7%)
- Potentially dangerous dams include:
--- 2 in poor condition

#3. Gloucester County
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- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 in poor condition

#2. Atlantic County
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- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 in poor condition

This story features data reporting by Paxtyn Merten, writing by Dom DiFurio, and is part of a series utilizing data automation across 50 states.

#1. Salem County
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