United States Last reviewed: August 28, 2026

Nevada Tap Water Quality

Q: Is tap water safe to drink in Nevada?

Yes: Las Vegas and Reno meet all EPA standards. The hardness that fuels complaints is cosmetic, and rural arsenic systems have largely installed treatment.

Q: Is Las Vegas running out of water?

Lake Mead's decline is a supply-planning crisis, not a quality one: SNWA's deep intake and aggressive recycling keep delivery secure, and the tap water remains fully treated and monitored.

Q: What was the Henderson perchlorate problem?

Cold War-era rocket-fuel manufacturing leached perchlorate into groundwater reaching Lake Mead. Remediation since the early 2000s reduced river loading by over 90%, and current levels are well within safety benchmarks.

about 180

Community water systems

City reports on this site

Tracked contaminants

August 28, 2026

Data reviewed

Check a Nevada ZIP Code

Overview

Nine in ten Nevadans drink Colorado River water from Lake Mead, treated by the Southern Nevada Water Authority for the Las Vegas Valley, or Truckee River water treated by TMWA in Reno. Both operations are heavily monitored and fully compliant, with SNWA's drought engineering (including the 'third straw' intake) nationally known.

The water is very hard and mineral-rich, the state's top consumer complaint but not a safety issue. Outside the metros, some rural basins carry naturally occurring arsenic (the Fallon area is well documented) and uranium, and small systems treat or blend accordingly.

Common Contaminants in Nevada

Hardness and TDS

Lake Mead water runs 250-300 mg/L hardness: softeners are common, safety is unaffected

Arsenic

Naturally elevated in several rural basins (Fallon, Fernley historically); affected systems installed treatment after the 2006 arsenic rule

Perchlorate legacy

The Henderson industrial site once fed perchlorate into Lake Mead; remediation cut levels dramatically and current water meets all standards

Violations & Compliance

The metro systems are consistently compliant. Rural arsenic drove a wave of small-system treatment installs; monitoring violations in tiny systems remain the most common enforcement item.