NI Water is currently replacing a distribution main in Claudy after a test last year revealed 68 per cent of samples taken from nine properties contained iron above the regulatory standard.
Water Minister Danny Kennedy said 23 out of 34 water samples taken from the properties on the Baranailt Road had too much iron.
“In order to improve the quality of the water supply in the Baranailt Road area, NIW has appointed a contractor to replace the section of the distribution main serving the affected properties,” said Mr Kennedy.
“Work commenced on 18 January 2014 and is expected to be completed within a month. In the interim, the customers will be supplied through a stringer pipe which should produce an immediate improvement in water quality,” he added.