 A recent conceptual model  considers that the water has journeyed from the limestone outcrops on the north crop of the coalfield over a period of at least five thousand years, but possibly ten thousand.The site is not protected by any statutory legislation; it is however, a registered "Regionally Important Geological Site" or RIGS  and a Grade II listed building site 

The early history of Taff's Well spring is not documented, in fact the first recorded visit to the spring was in 1760 by the chemist D. W. Linden.Roman settlements and roads occur throughout the Taff Valley but there is no evidence that the Romans knew about, or used the spring.