Politicians have called for an immediate study into whether a cement plant is affecting the health of villagers.
Alyn and Deeside MP Mark Tami and AM Carl Sargeant want the Environment Agency to conduct an independent review of the controversial new kiln at the Castle Cement works in Padeswood, following the dust and debris which fell recently over nearby Penyffordd village.
Penyffordd Community Council has called for the plant to be shut down until a health assessment is carried out and for more support for villagers from local politicians.
The owners of the plant have vigorously disputed the claims made at the community council meeting and say the new kiln is an environmental improvement.
In his letter to the Environment Agency, MP Mark Tami said a review was needed without delay.
He also said an assessment should be carried out even if it results in temporary closure of the new kiln.
He said: "Of utmost importance is public health and I am deeply concerned by the appearance of debris and dust over surrounding communities.
"Residents must have confidence in the Environment Agency and I believe a review is needed."
AM Carl Sargeant added: "There is no way that the new kiln can continue burning materials until an urgent review is carried out.
"Complaints about dust and debris in recent days have come from dozens of households."