The 2020 Tamar Estuary Report Card shows an overall improvement in water quality across all zones of the estuary since the last Report Card in 2018. No major flooding and ceasing the sediment raking program in 2019 was an important factor that led to improvements in ecosystem health.

Monthly monitoring data collected as part of the Ecosystem Health Assessment Program is collated and used to produce the Tamar Estuary Report Card, summarising the quality of the water in grades that relate to ecosystem health. Pressures and drivers of water quality change are identified for the 12-month reporting period.