Pool Water Testing

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Pool water

Water Testing for Swimming Pools, Spas & Hot Tubs

Acorn Environment Services is a leading water and environmental engineering specialist offering a range of laboratory based microbiological analysis and swimming pool water testing solutions (including tests for spas, hot tubs and hydrotherapy pools) to businesses, local authorities, healthcare organisations, schools, universities and private individuals throughout the UK and Ireland.

Our specialist laboratory procedures include tests for a range of common pathogens found in pool waters including E. coli, Pseudomonas aeruginosa, Total coliforms, TVC/Aerobic colony counts, Legionella bacteria and other less common organisms that can contaminate pools.

If you’re one of the many UK businesses, councils, hospitals, schools, universities or private households who own or operate a pool, hot tub or spa, then you’ll already know that maintaining the quality of the water in your pool is something which can’t be ignored.

Why test swimming pool water?

Unlike other water systems found in homes and commercial premises where the water is flushed or drained away after each use, swimming pools, hot tubs and spas could be considered as a re-circulating water system where the water is retained and re-used many times over.

If you’re not testing the chemical and microbial water quality regularly, taking steps to maintain balance and keep it clean, issues such as pH and water clarity can change, and more worryingly bacteria can start to grow rapidly.

Pool water sampling

What bacteria can contaminate a pool, spa or hot tub?

Bacteria such as E. coli, Pseudomonas aeruginosa and Legionella thrive in warm, poorly or untreated water and have the potential to make people using the pool or spa very ill.

Don’t assume that water which appears crystal clear is clean and safe to use – the types of bacteria which can grow in water are invisible to the naked eye.

All water samples collected are processed by independent UKAS accredited laboratory facilities within 6 hours of collection.

Certificates of water sample analysis will be sent to the client following the receipt of results from the laboratory.

Contact Acorn today to discuss a water management programme for your property.

What our clients say

Trust Pilot


"I rang out of hours for a wasp nest and someone came that evening and sorted the problem for me and my little boy as he's highly allergic, he was friendly & helpfull and reassuring, would highly recommend them really easy to contact Friendly team"

Amanda Grimes


"Acorn were so helpful on there online chat I had an issue with pigeons nesting under my solar panels and didn't know what to do,withing an hour I'd been contacted given a quote and 24hrs after acorn had been cleaned all the mess up and removed all the nests and proofed all my solar panels stopping pigeons coming back under can't recommend enough!"

Gillian Brown


"Your technician was very polite and well mannered, he even made time to have a quick chat which is a surprise for me as most people who work on your home are just there to get job done and go 10/10!"

Keighley Boyes


"I had a pigeon problem so I contacted Acorn, they came out and got rid for me. They also did a house clearance for me at the same time. I was amazed at the quality of the work done, and the aftercare. I would 100% recommend them."

Martin Cowell


"Excellent Service thanks for attending so promptly and dealing with the problem and taking into consideration the complex needs of the situation."

Natalie Hatzer


"Acorn came to remove a wasps nest from the time to reporting it to Acorn arriving to remove it was a total of 3 hours. I was so impressed. The lads who came were very helpful, professional and polite. Great value for money and I will be recommending to all my family and friends"

Tracie Jackson

Customer reviews

UK laws dealing with water quality testing in pools, spas and hot tubs.

HSG282 gives advice on effective ways to safely manage and control spa-pool systems through:

  • design, commissioning, operation and maintenance;
  • testing and monitoring spa-pool water quality;
  • quality and frequency of inspections.

Legislation covering the control of legionella and other infectious agents in spa-pool systems can be found here.

UK health and safety laws dealing with swimming pool and spa water quality, testing and treatment really only come into play if you’re running a business such as a leisure centre, gym or hotel, or the pool is in a holiday property which is let to paying guests.

Owners and operators of pools and spas need to ensure sure that the water quality and treatment programmes are effective and meet current standards.

Although the law might not apply to domestic pools and spas, they provide excellent guidelines and standards which it makes sense to read, understand and comply with.

For more information both the Health and Safety Executive and the Pool Water Treatment Advisory Group (PWTAG) provide excellent guidance to help pool operators comply with health and safety law.