Beyond Taste: How We Approach Tea Quality
Exceptional tea begins with what you experience in the cup. But for us, quality goes further.
At Formosa Rituals, we select teas for their character, origin and the experience they create in the cup. Aroma, texture, balance and complexity all matter.
But what cannot be seen or tasted matters too.
That is why our approach to sourcing also includes additional quality controls. For our first Taiwanese collection, Four Seasons Oolong, Alishan High Mountain Oolong, Lishan High Mountain Oolong and Dong Ding Oolong were individually screened for pesticide residues in Taiwan.
All four received a PASS result.
Quality begins with selection
We don't believe quality can be reduced to a label, a famous origin or a single test.
It begins with the tea itself: where it comes from, how it is produced, its aroma, structure and, ultimately, how it tastes.
Every tea we consider for Formosa Rituals has to earn its place in the collection. A prestigious name or celebrated growing region alone is not enough.
We look for teas with distinctive character, balance and a sense of place — teas we genuinely want to return to, cup after cup.
Testing complements that process. It doesn't replace it.
Why we test
Tea is an agricultural product. Like other crops, its cultivation can involve the use of pesticides.
For us, responsible sourcing therefore means looking beyond appearance, aroma and taste.
The four teas in our first Taiwanese collection were screened using Acetylcholinesterase (AChE) inhibition testing.
The test measures inhibition of AChE activity as an indication of the presence of certain neurotoxic pesticide residues, including organophosphates and/or carbamates. The report describes the screening as covering indications associated with more than 100 toxic pesticide residues.
The samples were tested in Taiwan on 6 July 2026, with the report issued on 8 July 2026.
The results
Each of the four teas in our first collection was tested individually.
FOUR SEASONS OOLONG
PASS
Batch F07061-01
LISHAN OOLONG
PASS
Batch F07061-02
ALISHAN OOLONG
PASS
Batch F07061-03
DONG DING OOLONG
PASS
Batch F07061-04
The report classifies an AChE inhibition rate between 0–34% as PASS. All four batches tested within the PASS classification.
What the test does — and doesn't — tell us
We prefer precise language over broad claims.
A PASS result from this screening should not be interpreted as a claim that a tea is completely “pesticide-free”. Nor does this screening, by itself, establish that a tea is certified organic.
Instead, it provides an additional layer of information alongside everything else we consider when selecting a tea: its provenance, craftsmanship, character and quality in the cup.
For us, that distinction matters.
Transparency isn't about making the biggest possible claim. It's about being clear about what we know, how we know it and what that information means.
Transparency behind the cup
We believe transparency is more meaningful when you can see the information behind it.
Rather than simply telling you that our teas have been tested, we want to make the underlying information available too.
The original test report for our first four Taiwanese oolongs is therefore available below.
VIEW THE ORIGINAL TEST REPORT →
Test Report of Rapid Bioassay for Pesticide Residues
Report No. 115A07812
Test date: 6 July 2026
Report date: 8 July 2026
Quality as an ongoing ritual
Our first collection is only the beginning.
As Formosa Rituals grows, we want to keep the same principle at the heart of what we do:
Select carefully. Ask questions. Test where it matters. Be transparent about what we find.
Because exceptional tea should not only taste remarkable.
You should also know where it comes from, understand the care behind it and know why it earned its place in our collection.