Can a bay clean itself after sewage pollution?

n1st

e.g. Kinvara bay in Galway.

If the water treatment comes into play, how long (roughly) would it take for the bay to clean itself?

Raw sewage has been into the bay for decades.
I presume the bay will eventually clean itself but how many years before the water and silt are to a safe standard to swim in?

SpaceTime

If Cork City is anything to go by, the Lee took over 5 years to be relatively clean.

ted1

n1st wrote: »

e.g. Kinvara bay in Galway.

If the water treatment comes into play, how long (roughly) would it take for the bay to clean itself?

Raw sewage has been into the bay for decades.
I presume the bay will eventually clean itself but how many years before the water and silt are to a safe standard to swim in?

Within days you'll see an improvement. I've been kitesurfing for over a decade , once the rings end WWTP opened as noticed an increase of shells on the beach