Water reuse in cosmetics: Treating water is only half the challenge
How L’Occitane en Provence is making water reuse more reliable with continuous microbiological monitoring.
Water is essential to cosmetics manufacturing. But what happens when freshwater becomes increasingly scarce?
For manufacturers looking to reduce their environmental impact, reusing treated wastewater offers a promising way forward. Yet recovering water is only part of the challenge. The real question is: How can manufacturers be confident that reclaimed water is suitable for reuse?
Water reuse starts with confidence
In the French Ardèche region, where water scarcity is a growing concern, L’Occitane en Provence is taking action.
At its Lagorce manufacturing site, the cosmetics company is working towards recovering 65% of its process wastewater. Rather than relying exclusively on freshwater, treated wastewater is reused for utility applications that do not come into contact with the final products.
The site has already achieved 39% water reuse, demonstrating how circular water management can become part of everyday industrial operations.
But as water reuse increases, so does the importance of understanding what is happening throughout the treatment process.
The challenge: What happens between two laboratory results?
Traditional microbiological testing provides valuable information about water quality.
However, culture-based methods can require 24 to 72 hours of incubation.
For a water treatment operator, a lot can happen during that time.
A change in microbiological conditions might affect treatment performance, membrane operation or the quality of the reclaimed water. Without timely information, operators have limited opportunities to respond proactively.
This is where continuous microbiological monitoring makes a difference.
Instead of relying solely on individual measurements, operators can follow changes over time, identify unusual developments and make more informed decisions.
Turning microbiological data into operational decisions
At L’Occitane's Lagorce site, BactoSense has been integrated into the water recycling process to provide automated bacterial cell counts at three critical monitoring points.
This gives the water management team greater visibility into the different stages of treatment, helping them detect microbiological changes within minutes rather than waiting for conventional culture-based results.
The information supports decisions about treatment optimization, membrane protection and the suitability of reclaimed water for its intended applications.
For L’Occitane, the objective goes beyond collecting more data. It is about making water reuse a reliable part of its production infrastructure.
These challenges go beyond water reuse. Discover how microbiological monitoring in the cosmetics industry helps manufacturers maintain water quality throughout the production process.
Making every drop count
Water reuse is an important step towards more sustainable industrial water management. But its long-term success depends on more than treatment technology alone.
Knowing how water quality evolves throughout the process helps manufacturers operate their reuse systems with greater confidence.
L’Occitane's experience demonstrates how combining water recovery with continuous microbiological visibility can support the transition towards a more circular approach to water.
Want to see how it works in practice?
Discover how L’Occitane monitors three critical points in its water recycling process, supports treatment optimization and protects the quality of its reclaimed water.
Frequently Asked Questions
How is recycled water used in the cosmetics industry?
Cosmetics manufacturers can treat and reuse process wastewater for utility applications that do not come into contact with the final products. This reduces freshwater consumption and supports more sustainable manufacturing. At its Lagorce site, L’Occitane en Provence has already achieved 39% water reuse, working towards a target of 65%.
Why is microbiological monitoring important for water reuse?
Reclaimed water must meet the quality requirements of its intended application. Microbiological conditions can change throughout the treatment process, potentially affecting water quality and system performance. Regular monitoring helps manufacturers detect changes, verify treatment effectiveness and make informed decisions about water reuse.
How does continuous microbiological monitoring improve water recycling processes?
Unlike conventional culture-based testing, which can take 24–72 hours, automated monitoring provides frequent microbiological measurements without manual sampling. This helps operators identify unusual changes earlier, optimize treatment processes and protect equipment such as reverse osmosis membranes. At L’Occitane, BactoSense automatically monitors three critical points along the water recycling process.
