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Salt use in the US
Source: Salt Institute
Ted Diers, NHDES Salt use in the US Source: Salt Institute Why - - PowerPoint PPT Presentation
Ted Diers, NHDES Salt use in the US Source: Salt Institute Why - - PowerPoint PPT Presentation
The State of Chlorides in New Hampshire Ted Diers, NHDES Salt use in the US Source: Salt Institute Why salt matters Landscaping Toxic for fish Infrastructure Wells Other issues Density of runoff water Effect on phosphorus
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Why salt matters …
Toxic for fish Landscaping Infrastructure Wells
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Other issues
- Density of runoff water
– Effect on phosphorus
- Combination effects
– Chloride PLUS – acidic PLUS – low DO
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150 200 250 300 350 400 450 500 1985 1990 1995 2000 2005 2010 2015 2020
Conductivity Year
Cobbetts Pond Conductivity Trend
Actual Upper 95% Predicted Lower 95%
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50 100 150 200 250 300 350 400 450 500 1985 1990 1995 2000 2005 2010 2015 2020 Conductivity
Year
Conductivity Trends in Cobbetts Pond and Lake Sunapee
Actual Upper 95% Predicted Lower 95% Actual Upper 95% Predicted Lower 95%
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Salt sources?
- Highway - I93 is ~10% of loading
- Roads and parking lots
- Household winter maintenance
- Septic systems and water softeners
- Salt storage
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The issue is over-application!
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How to reduce?
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- Training
- Certification
- Liability protection
- Like ski-areas
Training and Liability
Source: Wisconsin DOT Transportation Bulletin #22
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Many solutions, take small bites
- Focus on highest contributing watersheds
- Understand sources
- Identify Potential Low Salt Roads
- Reduce all salt sources
- Work with towns and NHDOT
- Green SnowPro
- Keep monitoring!
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