How much water does it take to build a subdivision in the desert? In one Southern Highlands case, about 29.5 million gallons over three years.
A Lennar housing development in Southern Highlands used 29.5 million gallons of water across 2024, 2025 and 2026, according to the Las Vegas Valley Water District, KTNV 13 reported.
Year by year
According to the water district, the development used:
- 2.5 million gallons in 2024
- 19 million gallons in 2025
- 8 million gallons so far in 2026
The district said the 2025 total wasn't typical for a housing development. The project needed extensive blasting and earthmoving, which increased the amount of water needed to control dust, KTNV reported.
A neighbor's concern
Joseph Bahr, who has lived in Southern Highlands for more than 20 years, told KTNV he has watched water trucks fill tanks from a fire hydrant near the site for more than two years.
"Hundreds and hundreds of trucks every day," Bahr said. "They've been up here for two years."
Bahr said he isn't against new homes, but wants more transparency.
"We're being told to water two days a week, three days a week and to conserve water when I see these trucks pull up every day, and this is not recyclable water either. All this water is gone," he said. "Every day there's something about Lake Mead and how we're losing water and how there's less water. Any amount is not insignificant."
What the rules say
The water district confirmed Lennar is authorized to draw water from a fire hydrant and pays for what it uses, KTNV reported.
Construction projects don't have a set maximum water-use limit, according to the district, but their use must be metered and follow permit requirements. Hydrant meter permits for construction sites must be renewed every 90 days, and district field teams monitor activity across the valley.
The district estimates construction water makes up about 1% of the community's total water use.
Why dust control takes so much water
Anyone who has worked a site in Southern Nevada knows dust control isn't optional. Clark County has strict air quality rules for construction, and blasting, grading and hauling on rocky ground kick up a lot of dust. Water trucks spraying haul roads and graded areas are the standard fix, and on a big site with heavy earthwork, that adds up quickly.
That's why the water district pointed to blasting and earthmoving to explain the 2025 spike. Once rough grading is done, water use usually drops, which matches the lower 2026 number.
Public attention is growing
Southern Nevada leans almost entirely on the Colorado River and Lake Mead, and residents face watering limits. When they see water trucks lining up at a hydrant every day, questions follow, even when the use is legal, metered and paid for.
This story shows how visible construction water use has become. Contractors and builders can expect more questions from neighbors, and possibly from officials, about how much water job sites use.
Why it matters for contractors
For Las Vegas Valley site contractors and builders, dust control water is a real cost and now a public relations issue. There's no set cap on construction water, but the district meters it, requires permit renewals every 90 days and monitors sites.
It may be worth looking at ways to cut use where possible: dust suppressants and soil stabilizers, gravel or paved haul roads, wind fencing, phasing grading so less ground is open at once, and using non-potable or recycled water where it's available and allowed. Tracking and being ready to explain water use can also help when neighbors start asking.
As water supply worries continue, it wouldn't be surprising to see more scrutiny of construction water. Builders who get ahead of it will be in a better spot.