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Our Responsible Business

As a responsible business we help shape a better world


As a responsible business our work makes a positive difference to the environment, our people, our clients, their customers and the communities we serve and live in, by creating a safer, sustainable future.

It is about more than what we do, it is about how we behave and how we live our values through our people, demonstrating our wider social commitment through our work, which will help us ‘shape a better world’.

At MWH Treatment we are continually improving how we operate through active membership of Business in the Community.


As part of Business in the Community we completed a tracker, which has been instrumental in identifying our current responsible business strengths and providing actions we can take to significantly improve our responsible business approach.

Health, Safety and Wellbeing

MWH Treatment is committed to improving health, safety and wellbeing in every aspect of our work. Nothing is more important to us than ensuring everyone gets home safe and healthy at the end of the working day. By doing this we are having a positive effect on both working and home lives.

We foster a culture of zero harm, which is at the heart of our approach, ensuring the safety of everyone who may be affected by our work. This is complemented by the most rigorous application of best practice health and safety processes and procedures, adhering to BS OHSAS 45001 occupational health and safety standards as a minimum.

Inclusion and Ethical Practices

At MWH Treatment our people are at the heart of everything we do. We create an environment that enables our people to flourish, bring their best to work, trusting and supporting them to develop and deliver, with a sense of belonging and common purpose.

Our people strategy is built upon five key themes

  • to promote a healthy workforce
  • inspire a culture of inclusion
  • connect, engage and communicate
  • attract and retain great people
  • help our people be the best they can be

As a business we are committed to raising standards and implementing ethical practices. As such we have a zero-tolerance policy regarding modern slavery and expect the same of our supply chain.


Care of the environment is central to MWH Treatment’s purpose and we are committed to sustainability. Our overarching objective is to carry out our business in such a manner as to maximise the positive effects on the environment, whilst continuing to provide value to our customers. Our environmental expectations and requirements are managed through an ISO14001 certified management system.

Our waste strategy of eliminate, reduce, reuse and recycle is applied throughout the life cycle from solution development to design through to delivery, commissioning and operation. Waste minimisation is achieved through value engineering, planning and collaboration with our supply chain and clients.

Carbon Reduction

We pride ourselves on providing solutions for our clients to help them achieve their sustainability aspirations and targets, including the lowering of whole life costs and carbon, both embedded and operational.

Our objective is to carry out our activities in such a manner as to mitigate the potential effects of climate change, assist clients’ in meeting their objectives and to adapt our operations for now and in the future.

MWH Treatment has calculated its organisational carbon footprint for the last 10 years, which has been externally verified through the Achilles CEMARS and now named Carbon Reduce scheme (see certificate). MWHT reduced carbon emissions during a 5 year period (2015-2019) and achieved a 35% reduction in emissions intensity, as well as a 41% reduction in absolute total emissions surpassing our original targets.​​​​​​​ In 2020, MWHT set a new baseline (2017 – 2019) with a new target of 20% reduction over 5 years. For 2021, when compared with the new baseline our total carbon footprint has increased by 9%. However MWHT are taking strides towards Net Zero Carbon by 2030 and working with employees, clients, suppliers and subcontractors to reduce our carbon footprint.​​​​​​​ For further details refer to the carbon disclosure statement.

MWH Treatment is also progressing towards organisational Net Zero Carbon by 2030, with a Route Map detailing the actions required to achieve this.

Business Process and Quality

MWH Treatment Ltd is committed to achieving operational excellence and fulfilling our objective of developing an increasingly sustainable business that meets or exceeds the requirements of our clients, stakeholders and shareholders. We operate ISO 9001, ISO 14001 & ISO 45001 certified management systems that ensures we lead market leading excellence in all areas of our work.


We aim to ensure that during our operations there is maximum positive impact to the communities we serve and live in. We support local economies through presence, purchasing, employment and engage in community initiatives at both our site and office locations.

Supply Chain Sustainability School and EcoVadis



We are proud to say that we are a Partner to the Supply Chain Sustainability School.

Alongside over 100 of the industry’s other major players (such as Morgan Sindall, Siemens, SGN, VINCI, Highways England, Barratt Developments and more) we have committed to collaborate to deliver real sustainability benefits for our business and the sector as a whole.

We will be sitting alongside these other forward-thinking clients, contractors, and suppliers to lead and drive the direction of the School, ensuring that we support our supply chain and internal colleagues to deliver more efficient and sustainable projects.


Since its founding in 2007, EcoVadis has grown to become the world’s largest and most trusted provider of business sustainability ratings, creating a global network of more than 90,000+ rated companies.

MWHT achieved a Bronze CSR Rating in 2022, which is the first year that MWH Treatment has undertaken this assessment. We have identified areas of strengths and improvements and incorporating into the company Responsible Business strategy.

Armed Forces Recruitment

At MWH Treatment we welcome people coming out of the military looking for a new career path. Your skills are transferable and at MWH Treatment you will be able to seamlessly transition from one career path to another. We have a wide variety of opportunities all throughout England and Scotland and you could join the dozens of ex-armed forces already at MWHT.