Key takeaways
- Zero tolerance means no accumulation allowed, not just clearing past a trigger.
- It usually requires crews and equipment dedicated to the site during the storm.
- It costs much more than trigger-based service because it ties up resources for the whole event.
- Many sites get most of the benefit from a low trigger, priority areas and pre-treatment instead.
On this page
What does zero tolerance mean?
In a trigger-based contract, the crew comes when snow passes a set depth, such as one inch, and clears the site. Between visits, snow can build up to the trigger again.
In a zero-tolerance contract, the goal is that pavement never accumulates snow or ice at all during the event. That usually means pre-treating before the storm, plowing continuously or at short intervals as snow falls, and re-treating as needed until the storm ends and the pavement is dry.
How is it different from trigger-based service?
| Trigger-based | Zero tolerance | |
|---|---|---|
| When crews act | After snow passes the trigger | Before and throughout the event |
| Accumulation between visits | Up to the trigger depth | None, as far as practical |
| Crew location | On a route, visiting many sites | Often dedicated to one site |
| Pre-treatment | Sometimes | Almost always |
| Cost | Lower | Much higher |
Who genuinely needs it?
- Hospitals and emergency departments, where ambulances and patients arrive around the clock.
- 24-hour operations, such as distribution centers with constant truck traffic.
- Sites with extreme liability exposure, where any accumulation creates unacceptable risk.
For most offices, plazas, churches and apartment communities, zero tolerance is more service than the site needs.
What drives the cost
Zero tolerance ties up a truck, a crew, and often a sidewalk team on one property for the length of the storm, instead of letting them serve a route. It uses more material for repeated treatments and it needs someone deciding when the event is truly over. You are paying for readiness, not just for work.
The middle ground most sites choose
Many commercial properties get most of the benefit with:
- A low trigger, such as one inch.
- Priority areas cleared first on every visit: accessible spaces, entrances and fire lanes.
- Pre-treatment before forecast icing and light snow. See anti-icing vs de-icing.
- Return visits during long storms.
- Timestamped records of every visit.
Our approach
Our standard commercial service is trigger-based at 1 inch, with accessible parking and entrances cleared first and every visit timestamped. If a site genuinely needs zero tolerance, we will say plainly whether it fits our routes and equipment, rather than promise something a route-based operation cannot deliver on the worst night of the year.
Written by the Macomb Lawn & Snow Solutions team in Macomb Township, Michigan. We plow and salt homes and businesses across all 26 Macomb County communities, November 15 to April 15. Published September 28, 2026. About us · How we research these guides · How our dispatch works