How do we determine whether a stream is “healthy” or water is “clean”? The answer may be more complicated than you would expect. At Community Science Institute, we measure a wide range of water quality indicators. These may also be called “analytes” (things we are analyzing). To help you understand what different results on our database might mean, we’ve put together a fact sheet on each of our analytes. You can download these fact sheets for your own use if you’d like, or just peruse them here.