Unfortunately where I live we get a cocktail of water depending on which part of Bribie Island we live in so the individual reports for the various sources aren't applicable to me.I would have thought your local water provider would have to publish these reports anyway, look to the provider of the water.
In our area we get water from four sources: Somerset/Wivenhoe Dams which are inland, the North Pine Dam which is Northside Brisbane, the Caboolture River (dead cows etc) which is on the Mainland from the Island, and from a set of underground water bores on the Island itself (slight salinity and heaps of sulphur). The cocktail is pumped to three very large water towers that then service the various suburbs on the island but how they adjust the flows into the towers from the various sources I have no idea, probably by examining the entrails of oxen or something
As we are coming into the wet season and have had excellent rain the last few months I'm seeing if I can get on to a supply of tank water and adjust accordingly, it's only 40L per BIAB brew so putting out some feelers but it would be a PITA.