Fresh, clean water is a limited resource that should be conserved.
The following links provide helpful information to keep your yard healthy while also conserving water during the hot and dry summer months:
Frequency of Watering: http://www.extension.umn.edu/garden/landscaping/maint/watering-frequency.htm
Water-Saving Strategies for Home Lawns: http://www.extension.umn.edu/garden/turfgrass/watering/water-saving/index.html
Water Wisely: Start in your own backyard: http://www.extension.umn.edu/garden/yard-garden/watering/water-wisely-tips
Watering Lawns and Other Turf: http://www.extension.umn.edu/garden/turfgrass/watering/watering-lawns/index.html
Cool Season Grass Selection: http://www.extension.umn.edu/garden/landscaping/maint/coolseas.htm
Heat, Drought, Summer Dormancy and Watering: http://www.extension.umn.edu/garden/landscaping/maint/watering-heat.htm
Practices to Increase Turfgrass Drought Tolerance: http://www.extension.umn.edu/garden/landscaping/maint/watering-tolerance.htm
Warmer Weather Brings Water Changes: http://www.cityofcarver.com/2017/05/warmer-weather-brings-water-changes/