Citizen Science Tahoe App

Despite its stunning beauty, Lake Tahoe is threatened – by aquatic invasive species, litter, stormwater pollution and climate change. To Keep Tahoe Blue, the League and our partners rely on science to understand and combat these threats. And that’s where you come in.

Use the free Citizen Science Tahoe app to share your observations and help protect Lake Tahoe’s health and beauty.

While you enjoy Tahoe’s beaches, blue waters, or soaring mountains, report what you see – both the good and the bad – using the app. With online platforms, citizen scientist volunteers can collect and share important data about their surrounding environment. You can help researchers by taking a few minutes to report what you see around the lake – whether it's an algal bloom, cloudy water, invasive species, or litter on the beach.

Every report makes a difference. Visit citizensciencetahoe.org and get started today.

• Water Quality: How does the water look? When the water is not clear, it can point to localized erosion or other problems that may require more investigation.
• Algae Watch: Do you see any algae? Understanding the location and timing of algae growth can help us better control it.
• That's Not Natural: Do you see litter, graffiti, or other human impacts where they shouldn’t be? Did you pick up litter? Your reports will drive solutions for these “hot spots,” including community cleanup events.
• Eyes on the Lake: Have you spotted aquatic invasive weeds? Report your sightings of these aquatic invaders to help prevent Tahoe’s blue waters from turning a murky green.
• Pipe Keepers: Lake Tahoe is losing water clarity to stormwater pollution that runs off roads and urban areas. Protect Lake Tahoe by reporting polluted runoff.
• Tahoe. Rain or Snow?: Send us updates in real-time to share whether it is raining, snowing, or a wintry-mix.
• Stories in the Snow: Share your snow crystal images.
• Drink Tahoe Tap Where?: Find or report a water fill station.