There are different categories in the Crowdwater App:
- Virtual Staff Gauge: For water level observations if there is no staff gauge installed in the stream.
- Physical Staff Gauge: Water level observations based on a staff gauge (ruler) installed in the stream.
- Soil Moisture: Moisture status for any unsealed surface.
- Plastic Pollution: Observations of plastic in a water body or on the shore.
- Temporary Stream: The flow state of streams that sometimes dry up.
- Stream Type: General information for a watercourse, including information on the water quality.