Tata Steel in Port Talbot has been issued with an enforcement notice in response to dust which has been affecting the local community.
Following numerous complaints Natural Resources Wales launched an investigation to pinpoint the source of the dust problems.
An initial investigation identified a part of the plant where raw materials are kept and moved into storage as the main cause.
Officers found a dust suppressant used by the steelworks was not effective and the company has installed a water spray to reduce the dust. NRW say Tata also plan to install a new dust suppression system before the end of July.
NRW says it has taken enforcement action that requires the company to carry out a further review into the dust problems it caused in June and July. It's also asked Tata to find long term solutions to reduce dust from the site.
Mary Youell, from Natural Resources Wales, said, “Tata Steel is a very important part of this community, and by issuing this enforcement notice we are making sure that it operates to the highest standards to protect local people and the environment.”