Certificates:
NCH undergoes industry leading processes to ensure that we deliver best practice to all our clients. A list of our current accreditations are viewable below:
UK Legionella control requirements
Legionella Control Association
NCH Europe ISO 9001:2015 ISO 14001:2015 ISO 45001:2018
NCH (UK) Ltd. ISO 9001:2015 ISO 14001:2015 ISO 45001:2018
Resources:
NCH has brought together important and freely available information in one place, please take a look through these resources:

Legionnaires’ disease: the control of legionella bacteria in water systems
Approved Code of Practice and guidance on regulations

Legionnaires’ disease: Technical guidance: Part 1
The control of legionella bacteria in evaporative cooling systems

Legionnaires’ disease: Technical guidance: Part 3
The control of legionella bacteria in other risk systems