In a typical winter, we scatter approximately
404,000 tons of chloride-containing salt on our paved surfaces across Minnesota. Not only does salt damage our infrastructure and plants, but it is also harmful to our waters. When the snow melts or it rains, salt runs into storm drains and into nearby lakes, rivers, and groundwater. Salt is commonly over-applied, sending too much chloride into our waterways and wreaking havoc for fish and other wildlife. In fact, some waterways have so much chloride, they have been added to the
state’s impaired waters list.
Here are some salting tips that will reduce the amount of pollution that ends up in our lakes:
- Shovel and scrape. The more snow and ice you remove, the less salt is needed to be effective. Watch this video about tools, techniques, and products that you can use to keep your driveways and sidewalks safe while protecting our waters. And make sure to take breaks and don’t overexert yourself.
- Know what you’re buying. There are no labeling requirements for deicer packaging. Beware of labeling claims such as ”environmentally friendly” or “pet friendly” because no testing of deicers has been done to prove they are safe or will work in all conditions. It is the buyer's responsibility to fully research products and make decisions accordingly, so don’t waste your money on something that won’t work.
- Temperatures below 15°F are too cold for salt. Most salts stop working at this temperature. Use sand for traction instead, but remember that sand does not melt ice.
- Use the right amount. That crunch from sidewalk salt under your feet does not signify safety. People often think using more salt means more melting and safer conditions, but this is not true. Around 12 ounces — enough to fill a coffee mug — effectively treats a 20-foot driveway or 10 sidewalk squares (about 1,000 square feet). Aim to apply salt evenly and use only in critical areas. Using more than the recommended is simply a waste, costing you money.
- Sweep up visible salt on dry surfaces. Leftover salt is no longer doing any work and will just be washed away into local waters. You can keep it to reuse later, saving you money. When the correct of salt amount is used, there should not be any visible salt left behind.
- Wear proper footwear. Wear shoes or boots with good traction and pay attention to where you are walking, avoiding icy spots, if possible. Take it slow and give yourself extra time to get where you’re going.
