Rugeley-based reed bed specialist ARM is celebrating its 60th year - with the help of a renewed Severn Trent contract.
Trading since 1947, the Staffordshire company originated as agricultural engineers and over the past 20 years has rein-vented itself by specialising in reed bed and wetland technology.
It has become the UK's leading designer and constructor of reed bed-based water treatment systems.
Wetland technology can be used in a wide variety of applications, including the treatment of sewage, mine drainage discharges, organic chemicals, landfill leachate and industrial effluents.
ARM's client base includes several water companies, food processors, local authorities and domestic properties. It also has partnerships in China and Spain.
ARM managing director David Cooper said: "We are very proud to have reached the 60-year milestone and are looking forward to another 60-plus years of trading.
"Environmentally friendly and sustainable technologies are the future and we strive to expand our range of applications through research and development to make these available to more industries."
ARM has been awarded a renewed framework agreement for the provision of maintenance to all 300-plus of Severn Trent's reed bed sites.
John Standen, contracts manager, said: "We are very pleased to have been awarded the maintenance contract allowing us to continue and develop our relationship with Severn Trent."
The two have been working together since the early 1990s.
ARM has held the contract for the past four years.