Irrigation Restrictions
Current Irrigation Restrictions:
Level Two. Restricted watering times.
Here’s how Big Sky can irrigate smarter during drought and peak summer demand.
Level One
Watering times: 4:00 AM – 8:00 AM
No unattended open-hose watering; sprinkler flow only
Level Two
Watering days: Even/odd calendar day schedule (same North/South Highway 64 and address-number split)
Watering times: 4:00 AM – 8:00 AM
Level Three
No irrigation until further notice
Why are restrictions in place
Outdoor watering in Big Sky has a major impact on the District’s water system. During the summer months, irrigation demand can increase overall water use by up to 300%, and some individual customers may see usage increase by as much as 600%. This seasonal strain makes it more difficult to maintain storage tank levels—especially during wildfire season and periods of drought.
Research from Montana State University Extension also recommends limiting watering during the hottest parts of the day to reduce evaporation, improve soil absorption, and prevent unnecessary water loss. MSU further recommends deep, infrequent watering practices, with most lawns requiring only 1–1.5 inches of water per week, including rainfall.
To help protect Big Sky’s long-term water supply, maintain adequate storage for fire protection, and encourage more efficient outdoor water use, irrigation restrictions are in effect each year from June 1 through September 15.
Enforcement: Irrigation restrictions are backed by District ordinance. Failure to follow these rules is a violation and may result in fines.
MSU Watering Guide Resource:
https://www.montana.edu/extension
Irrigation Tips
- Water early in the morning during cooler temps and lighter winds to reduce evaporation
- Use drip irrigation instead of sprinklers when possible
- Check your irrigation system for leaks regularly
- Follow seasonal restrictions to avoid fines and conserve water
More Tips
- Avoid short daily watering cycles that increase evaporation and shallow roots
- Consider using smart irrigation controllers or rain sensors to improve efficiency.