Salt is an important tool for keeping roads, parking lots, driveways and walkways safe in winter, but it also pollutes waterways. Under current state and federal guidelines, a teaspoon of salt is enough to permanently pollute five gallons of freshwater. Recent studies suggest even smaller quantities of salt can be toxic to freshwater ecosystems like Newfound Lake.
After a snowstorm, melting snow dissolves road salt washing it into waterways. The chloride in salt doesn't break down, so once it is in the water it is there to stay. Over time, it can accumulate to toxic levels. The biggest impact is on zooplankton - tiny organisms that keep water clear by eating algae and phytoplankton and an important food source for fish and other predators. Declines in zooplankton can mean murkier water and fewer fish and wildlife.
Smart salt use is essential to protecting Newfound Lake. Here are simple steps to help keep salt pollution out of Newfound's waterways:
- Shovel first. Salting without removing snow only leads to slush and ice.
- Use salt only in the right conditions. Salt is most effective around 30° F, and quickly loses its effectiveness below 15° F. In colder weather, use sand for traction instead.
- Use salt sparingly. A single 12-oz mug is enough to cover twenty feet of driveway.
- Sweep it up. Sweep up leftover salt and it can be reused after the next storm!
- Use a Green SnowPro certified snow removal contractor. Find a list here, or ask your contractor to get certified today.
- Stay indoors during storms. Can your errand wait? Let conditions improve and give road crews time to clear the roads before you venture out.
For more information on the impact of road salt, its alternatives, and best practices for managing winter conditions while minimizing environmental harm, visit: NHLAKES.org.