“With further unsettled periods and rainfall over the coming weeks we will continue to closely monitor the situation,” the spokesman added.
The move to drought status for the region was only revealed on Wednesday, and comes following a period classified as “dry weather status”, which began on 30 April.
The agency has warned that drought could put a strain on water resources, lead to dead fish and algal blooms, as well as causing problems in rivers for wildlife trying to move upstream due to reduced flow.
It has a drought plan in place to manage the dry weather, and to regulate United Utilities to “make the best use of available water whilst also protecting the environment”.
The water firm, which supplies water to millions of people across the region, has been contacted for comment.