Regionally tuned algorithms that deliver remotely sensed marine water quality products from the MODIS/Aqua sensor have been developed and validated for the Great Barrier Reef (GBR). Through the eReefs partnership, these algorithms are being transferred from the research domain and being deployed operationally via the national meteorological agency. Furthermore they are being adapted to work with two other ocean colour satellite instruments, SeaWiFS and VIIRS/NPP to enable extension of the monitoring time series, both historically and into the future. The production infrastructure to manage contemporary data flows from the VIIRS sensor is similarly being extended. In parallel, the validated remote sensing products are being integrated into a hydrodynamic and bio-geochemical regional ocean model through data assimilation to provide a holistic suite of monitoring products for the GBR. This work is being undertaken with the goal of expanding the monitoring to more of Australia's marine jurisdiction. While the remote sensing algorithms themselves are parameterised for the atmospheric and optical characteristics of the GBR region, they are inherently flexible and are progressively being applied and tested in other locations where suitable in situ data are available. The data processing system for the GBR already is nested within the national data production operated by the Integrated Marine Observing System.