ICS EVIDENCE GOVERNANCE NOTEREGISTER · 2026

EVIDENCE BOUNDARY & STANDARDS DISPOSITION

Tea totals and infusion transfer

Preserve dry-leaf and prepared-infusion bases as different records and require consumer-facing claims to name which basis was actually tested.

The controlling scientific record is the public Heavy Metal Index synthesis, supported by 8 named anchor sources and expressed for Aluminum, Lead, Cadmium, Chromium, Arsenic.

ICS does not reproduce the source extraction here. Keeping the evidence on the independent index preserves source-level methods, units, species, basis, uncertainty, and review state. This note records only the institutional consequence of that evidence.

Preserve dry-leaf and prepared-infusion bases as different records and require consumer-facing claims to name which basis was actually tested.

This disposition may change taxonomy, analyte coverage, test basis, surveillance priority, disclosure, or claim language. It does not allow a market occurrence percentile or a dramatic single study to become an initial certification value.

The finding is published in two additional authority layers: the HMI evidence record and the HMTc certification interpretation. Distribution should prioritize tea manufacturers, laboratories, retailers, consumer educators while preserving those distinct roles in headlines, briefings, interviews, and social posts.

Audience

tea manufacturers · laboratories · retailers · consumer educators

SUGGESTED CITATION

Pendergrass, K. (2026). “Tea totals and infusion transfer.” ICS Evidence Governance Notes. ICS-EGN-2026-009. Institute of Contaminant Standards.

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