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• Algae
• Cloudy Water
• Cryptosporidium
• Fluoride
• Giardia
• Hard Water
• Lead
• MTBE
• Perchlorate
• Pharmaceuticals
• Pink Bacteria
• Quagga Mussels
• Trihalomethanes

Facts & Issues

The presence of contaminants does
not necessarily indicate a health risk.

Drinking water, including bottled water, may contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that water poses a health risk.

From algae to trihalomethanes, the information in this section provides the facts about a variety of water-related issues.

Water contaminants and issues:

• Algae
• Cryptosporidium
• Fluoride
• Giardia
• Hard Water
• Lead
• MTBE
• Perchlorate
• Pharmaceuticals
• Pink Bacteria
• Quagga Mussels
• Trihalomethanes - THM

Visit the Water Quality Report page to view the annual report for the Southern Nevada Water System, which treats Southern Nevada's water supply.

For more information about other contaminants, see the EPA’s Drinking Water Contaminant List.