Aluminium removal: water filter test for up to 3,200 litres
LABORATORY ANALYSIS • ALUMINIUM • LONG-TERM STABILITY
Aluminium may be present in some drinking waters. But to know whether a filter is truly effective, it is not enough to look at its performance at the beginning: you need to check what it remains capable of doing after several thousand litres.
Latest SGS test of the Ultimate Star Filter® water filter: aluminium reduction measured up to 3,200 litres, using EPA 200.8 analytical method.
The true performance of a filter should not be judged only at the first litre, but over time.
Key takeaways
- Aluminium can naturally be present in water or linked to certain drinking water treatment processes.
- Its presence depends in particular on pH, the distribution network, raw water quality and infrastructure.
- A serious filter must be assessed over time, not only at the beginning.
- The Ultimate Star Filter® achieves over 99% aluminium reduction up to 2,250 L.
- At 3,200 L, beyond its nominal lifespan of 3,000 L, reduction remains measured at 91%.
SGS RESULTS
Aluminium: what the latest test on the Ultimate Star Filter® shows
The aluminium challenge test was carried out at several stages of the filter’s lifespan. Aluminium-enriched water was analysed before and after filtration, in order to measure the actual removal rate.
Key result from the SGS test
- The Ultimate Star Filter® water filter reduces aluminium from 190.7 µg/L to 5.1 µg/L at start-up, equivalent to a 97.3% reduction.
- At 2,250 L, reduction remains above 99%.
- At 3,200 L, beyond the nominal lifespan of 3,000 L, reduction is still measured at 91%.
On mobile, scroll the table horizontally to view all the data.
| Test point | Aluminium in raw water | Aluminium in filtered water | Removal rate | Interpretation |
|---|---|---|---|---|
| Start-up | 190.7 µg/L | 5.1 µg/L | 97.3% | High performance from the start. |
| 750 L | 203.4 µg/L | 1.7 µg/L | 99.2% | Performance above 99%. |
| 1,500 L | 197.9 µg/L | 1.5 µg/L | 99.2% | Stability confirmed halfway through. |
| 2,250 L | 187.8 µg/L | 1.4 µg/L | 99.3% | Performance still above 99%. |
| 3,200 L | 196.1 µg/L | 17.7 µg/L | 91.0% | Performance still measured beyond nominal lifespan. |
The result at 3,200 L should not be read as a weakness, but as a transparency datum: it shows what reduction capacity the filter still retains after exceeding its stated nominal lifespan.
UNDERSTANDING THE ISSUE
Why is aluminium sometimes found in water?
A natural presence
Aluminium is a metal naturally present in the Earth’s crust. Traces can therefore be found in certain waters, depending on local geology and soil composition.
Water treatment
Some clarification processes use aluminium salts to help remove suspended particles. Depending on treatment conditions, residues may remain.
The role of the network
The measured concentration may vary according to the pH of the water, the distribution network, infrastructure, materials in contact with the water and the quality of the raw water.
A precautionary approach
Many consumers want to reduce their daily exposure to certain metals or residues present in drinking water.
To understand more broadly why drinking water may be filtered, you can read our dedicated page: why filter drinking water.
INSTITUTIONAL REFERENCES
Aluminium in drinking water: key reference sources
French Public Health Code, Article R1321-2
water intended for human consumption must not contain substances that may constitute a potential danger to human health.
Order of 11 January 2007
it sets the quality limits and reference values applicable to water intended for human consumption in France.
French Ministry of Health
aluminium has a quality reference value of 200 µg/L, equivalent to 0.2 mg/L, in water intended for human consumption.
World Health Organization
the WHO indicates that residual concentrations around 0.1 to 0.2 mg/L can be achieved in treated water when treatment processes are properly optimised.
These references do not replace a local tap water analysis, but they help explain why the measured concentration, the unit used and the test context are essential for correctly interpreting filtration performance.
THE MARKET ISSUE
Water filter performance tests: why a removal rate alone is not enough
In water filtration, impressive figures are common. But a result displayed without a protocol, without filtered volume, without inlet concentration and without test duration remains difficult to interpret.
Look only at the first filtered liter
A filter may perform well at the beginning, then see its performance evolve with use. That is why tests over time are essential.
Comparing figures that are not comparable
Two results cannot be seriously compared if the test conditions, contaminant, flow rate or inlet concentration are not specified.
Confusing promises with proof of a filter’s effectiveness
A marketing claim may reassure. A documented analysis allows understanding. These are not the same level of information.
Forgetting lifespan
The real question is not only “does the filter work?”, but “for how long does it maintain measurable performance?”.
This logic is central to our approach: evaluating a filter by its results, protocol and stability. To go further, also read: how to know whether a water filter is truly effective.
QUICK GLOSSARY
Terms to understand before reading an aluminium test
Total aluminium
Total aluminium refers to the overall amount of aluminium measured in water, in all forms combined. It is a useful reference point for comparing concentrations before and after filtration.
Dissolved aluminium
Dissolved aluminium refers to the fraction present in dissolved form in water. Depending on pH and water chemistry, aluminium can occur in different forms.
mg/L and µg/L
mg/L means milligram per litre. µg/L means microgram per litre. 0.2 mg/L equals 200 µg/L. The SGS test expresses results in µg/L.
Reduction or removal
Reduction refers to the measured decrease between water before filtration and water after filtration. For example, going from 190.7 µg/L to 5.1 µg/L corresponds to a 97.3% reduction.
THE REAL CRITERION
Filtering aluminium: the real issue is stability over time
A household filter is used every day, for several months. Its performance must therefore be observed over time, not only during the first uses.
Start-up
The filter is tested at the beginning of its use, when the filtration media are new.
Intermediate volumes
Measurements are carried out at several checkpoints: 750 L, 1,500 L and 2,250 L.
Beyond nominal lifespan
The test goes up to 3,200 L, beyond the nominal lifespan of 3,000 L per filter.
This approach reflects a fundamental point of gravity filtration: contact time, controlled flow and internal architecture influence real performance. See also: how a gravity water filter works and why the flow rate of a gravity filter really matters.
WHAT THIS CHANGES
What a water filter really needs to prove
A clear protocol
tested contaminant, flow rate, inlet concentration and analytical method must be specified.
Results over time
a filter must be assessed at different volumes, not only at start-up.
A coherent architecture
filtration media, membrane, flow rate and contact time must work together.
Published proof
results must be accessible, understandable and placed in context.
SOLUTION
What a water filter like the Ultimate Star Filter® brings
The Ultimate Star Filter® is not designed around a single filtration medium, but around a complete architecture: activated carbon, nanofiltration membrane, physical filtration, electro-adsorption, bacteriostatic treatment with colloidal silver and a flow-optimised design.
An architecture designed for performance
The combination of filtration media helps target several families of contaminants, while maintaining gravity filtration that is simple to use every day.
Discover the design and architecture of the Ultimate Star Filter®
Documented technology
The filter combines high-quality activated carbon, a nanofiltration membrane and complementary mechanisms of physical retention and electro-adsorption.
A stated and tested lifespan
The nominal lifespan is 3,000 litres per filter. Here, the aluminium test goes up to 3,200 litres, allowing the real evolution of performance to be observed more clearly.
A proof-based approach
NSF® certification, REACH compliance and independent laboratory analyses provide a more serious reading than simple commercial promises.
FREQUENTLY ASKED QUESTIONS
Aluminium, drinking water and filtration: the questions to ask
Is aluminium in water common?
It may be present in trace amounts in certain waters, naturally or as a result of treatment processes. Concentrations vary depending on the region, the network and distribution conditions.
Can a water filter reduce aluminium?
Yes, some filters can reduce aluminium, but published results, the test protocol, filtered volume and performance stability over time must be checked.
Why test a filter up to several thousand litres?
Because a filter is used over time. A start-up test does not show whether performance remains high after several months of use.
What does a 91% result at 3,200 L mean?
It means that, under the SGS test conditions, the filter still reduces aluminium by 91% after 3,200 litres, beyond its nominal lifespan of 3,000 litres.
How can I know whether there is aluminium in my tap water?
The most reliable way is to check the official drinking water monitoring results for your area or request a specific water analysis. Aluminium levels may vary depending on the water source, treatment process, pH and distribution network.
Does bottled water contain aluminium?
It may contain trace amounts depending on the source, mineral composition and production conditions. As with tap water, only a published analysis or information requested from the producer can confirm the actual concentration.
Do filter jugs remove aluminium?
It depends on their technology and, above all, on the available test results. To compare seriously, check the tested contaminant, inlet concentration, filtered volume, analytical method and performance over time.
Does boiling water remove aluminium?
No. Boiling water is not a method for removing aluminium. Boiling may act on certain microorganisms, but it does not remove dissolved metals or mineral residues.
CONCLUSION
Useful proof is not always the most spectacular figure
The aluminium analysis shows one essential point: a water filter must be assessed over time. Start-up results are useful, but they are not enough to understand the real performance of a system used every day.
Publishing results up to 3,200 litres, including when performance evolves, allows for a more transparent, more scientific and more useful reading when choosing a filter.
What to remember
A serious filter is not limited to a promise. It must present a coherent architecture, documented data, readable results and performance observed over time.
The water you drink every day deserves more than an isolated figure. It deserves proof.
Go further
Laboratory analysis results
View the independent analyses carried out on the Ultimate Star Filter®.
Design & architecture
Understand why the internal structure of a filter influences its performance.
Filter lifespan
Understand nominal lifespan, flow rate and performance over time.
NSF® Certification
See why NSF® certification is an important marker of credibility.
REACH & material safety
Understand the importance of compliance for materials in contact with water.
Is a filter truly effective?
The essential criteria for reading filtration performance with perspective.
Star Water Filter®
The technical content published on this website is written and validated by the Star Water Filter® technical team.
It is based on independent laboratory analyses, performance data from the Ultimate Star Filter® and experience gained in the design and use of gravity filtration systems.
