Bottled vs In-House Lab Water Purification: Pros and Cons

Water purity is a critical factor in scientific and laboratory processes. Achieving and maintaining the correct level of purity is essential for accurate results and efficient operations. This blog explores the options available for supplying pure water in laboratories, focusing on the advantages and disadvantages of bottled water versus in-house purification systems.

Understanding Water Purity Levels

Before exploring the supply options, it is crucial to understand the different purity levels of water used in laboratories. Water is typically classified into Type I, Type II, and Type III, with Type I being the purest. Each type serves different purposes, from critical experiments requiring ultra-pure water to general cleaning processes. Please see our detailed infographic below for more information on the topic:

For a more detailed breakdown, see our article: Understanding Different Types of Pure Water for Laboratory Applications

Bottled Water: Pros and Cons

Pros:

• Convenience and Simplicity: Bottled water requires no initial capital investment or ongoing maintenance, making it a straightforward option for many labs. It is managed like other laboratory reagents, with clear expiry dates and documented purity levels.
• Accessibility: Bottled water is readily available and can be purchased in various quantities to suit immediate needs.

Cons:

• Contamination Risks: Despite the stated purity level, the storage and handling of bottled water can introduce contaminants. Plastic bottles, if not manufactured correctly, may leach organic plasticisers and other impurities into the water.
• Purity Degradation: Once opened, bottled water's purity begins to degrade rapidly due to exposure to air, which introduces bacterial, ionic, and organic contaminants.
• Cost and Environmental Impact: Frequent purchases of bottled water can become expensive, especially for labs with high water usage. Additionally, the plastic waste generated contributes significantly to environmental pollution.
  
  

In-House Purification Systems: Pros and Cons

Pros:

• Cost-Effectiveness: Over the long term, in-house purification systems can be more economical, providing very low costs per litre of water.
• Flexibility and Control: These systems offer flexibility in adjusting water purity levels as laboratory needs evolve, ensuring consistent quality.
• Environmental Benefits: By reducing reliance on bottled water, laboratories can significantly decrease their plastic waste footprint.

Cons:

• Initial Investment: Setting up an in-house system requires upfront capital and ongoing maintenance, which may be a barrier for smaller labs.
• Complexity: Managing and maintaining the system requires technical expertise and regular oversight.
  
  

Detailed Analysis:

Contamination Risks: The purity of bottled water is vulnerable to contamination once the seal is broken. The Clinical and Laboratory Standards Institute (CLSI) advises purchasing small volumes to minimize degradation. In contrast, in-house systems can continuously produce pure water, reducing the risk of contamination.

Cost Implications: While bottled water may appear cost-effective initially, the cumulative expense of frequent purchases can be substantial. In-house systems, despite their initial costs, offer significant savings over time, especially for laboratories with high water consumption.

Environmental Impact: The global laboratory sector generates approximately 5.5 million tonnes of plastic waste annually, much of which comes from bottled water. Transitioning to in-house systems can help mitigate this environmental impact, aligning with sustainability goals.

Recommendations: For laboratories with substantial water usage, investing in an in-house purification system is advisable for long-term savings and sustainability. Smaller labs may opt for bottled water but should manage volumes carefully to maintain purity and minimize waste.

Choosing the right water supply method depends on laboratory size, usage needs, and budget constraints. Both bottled water and in-house systems have their merits, but careful consideration of contamination risks, costs, and environmental impact will guide the best choice for each laboratory.

Contact us for guidance and expertise in selecting the best water purification solution for your laboratory. Our team is here to help you navigate the options and ensure optimal water purity for your specific needs. Click here.