Colorado's water-right system follows priorities. When available water is insufficient, a junior right can be curtailed in favor of a senior right. Identify the supply's legal priority, well conditions and any augmentation arrangements. Changing reuse, rainwater collection or return flows can interact with water rights; receiving a water-quality authorization does not by itself resolve those rights.
Sources: Colorado DWR water rights; Colorado DWR rainwater stormwater and graywater