The community of Mammoth Lakes uses almost 20 million gallons a week for irrigation during our summer months. The Mammoth Community Water District has develop an irrigation schedule to assist in mitigating this increased demand. Please do your part to conserve our water resources; look at our Managing a Water Efficient Lawn page for suggestions on how to lower your outdoor usage. Also, take advantage of our pressure reducing valve rebate to maximize your irrigation efficiency.
This figure illustrate that over half of the water produced during the summer is used for irrigation. Sierra Star Golf Course irrigates with recycled water and is not included in the water demand data.
Level 3 Restrictions in effect:
Please follow these requirements:
• Even numbered addresses irrigate on Wednesday and Saturday
• Odd numbered addresses irrigate on Thursday and Sunday
• Outdoor watering, with irrigation system is only permitted between the
hours of 1am - 6am and 8pm -11pm.
• Hand-held hose watering is permitted Wednesday, Thursday, Saturday
and Sunday between 1am-10am and 4pm - 11pm.
• No variances will be granted for new lawns or rehabilitating lawns.
• Irrigation with a hand-held hose must be equipped with an automatic
• All hose-end sprinklers must be equipped with a shutoff timer
• Overfilling of swimming pools or spas is prohibited
• Water may not pool, pond, or mist off impervious areas
• Irrigation accounts may not exceed 80% of the District's MAWA
• Washing of hard surfaces with District supplied water is prohibited,
unless required for health and safety reasons
• All Leaks must be repaired within in 48 hours after notification from the
District, rental properties have 72 hours
Simple Water-Saving Tips
• Water only when necessary - saves 1,100 gallons per irrigation cycle.
• Water in the early morning, before 10 a.m., to reduce evaporation and interference from the wind - saves 25 gallons per day.
• Check sprinkler system for leaks, overspray and broken sprinkler heads - saves 500 gallons per month.
• Turn off hoses when not in use and use a automatic shut-off nozzle - saves up to 7,500 gallons per year.
• Use a broom instead of a hose to clean driveways and sidewalks - saves 150 gallons each time.
Irrigation and Landscape Upgrades
• Install a “smart” sprinkler controller - saves 40 gallons per irrigation cycle.
• Deliver the appropriate pressure to your irrigation system - reduces water use by 30%
• Place organic mulch throughout garden to reduce evaporation, even out soil temperatures and inhibit weed growth - save hundreds of gallons per
• Replace thirsty plants with California Friendly drought-resistant varieties - saves hundreds of gallons each year per plant.
Helping You Be Always Water Smart
• We offer rebates toward the purchase of pressure reducing valves.
Qualified Water Efficient Landscaper (QWEL) graduates in Mono and Inyo Counties. Click Here.
Anonymous Irrigation Hotline: (760) 924-4511
Outdoor Water Saving Resources
Mammoth Community Water District © 2017