Minneapolis chloride reduction measures

You can learn how Minneapolis uses best practices to lower chloride (salt) use in snow and ice removal.


Capturing chloride (salt) reduction efforts for NPDES reporting and bridging efforts. 

Chloride salt is a permanent pollutant that is harmful to aquatic and plant life. 78% of salt applied in the metro area ends up in groundwater or local lakes and rivers. Help protect our freshwater and cut down on costs by using less salt while still maintaining safe conditions.  

Thank you to our salt stewards! 


Flow Chart Showing Salt to River







  • NPDES MS4 Phase I Permit Annual Report 
  • Twin Cities Chloride Management Plan 


Information on Chlorides



Public Works Transportation Maintenance & Repair (TMR) Division - Street Department 

  • TMR follows best management practices for methods, procedures and storage as outlined in the annual MS4/NPDES permitting reporting. 


TMR street and bridge department 

  • Responsible for citywide snow and ice control in streets, alleys, parkways, some trails, bikeways, bridge sidewalks, and some City owned sidewalks and pedestrian facilities.  
  • To mainly de-ice and sometimes anti-ice the following are used: Sodium chloride (NaCl) in the form of rock salt, Calcium chloride (CaCl2) for sidewalks and other pedestrian facilities, and magnesium chloride (MgCl2) on streets that comes in our treated salt.  
  • Formal Snowplow Operator Training (SPOT) with peer agencies or TMR trainers.
  • APWA (American Public Works Association) trainings and workshops.
  • Minnesota Local Training Assistance Program (LTAP) 
  • MPCA Smart Salting certification for employees and supervisors.


TMR ramp restoration and repair group

  • Manages the City parking ramps and performs sidewalk winter maintenance for police precincts and other City owned sidewalks. 


TMR sidewalk inspections office 

  • Public sidewalks in the right-of-way are the responsibility of the abutting property owners. This office employs contractors to clear non-compliant properties.
  • Contractors are required to be MPCA Smart Salting certified.


TMR special service districts (SSD) 

  • Public right-of-way sidewalks. The City hires contractors and recovers the cost from the SSD.  
  • Contractors are required to be MPCA Smart Salting certified.




Figure 6-1 from pg. 54 of the NPDES Report 

Graph showing Years 2001-2020 on the X and Sand Applied (tons) on Y