BWMS - Type-Approval Test Classification
BWMS type-approval test classification per MEPC.300(72) / USCG 46 CFR 162 - criteria against D-2 standard.
Approval coverage
IMO only - not accepted US waters after 2020
Formula, assumptions, and limits
USCG requires viable (FDA/CMFDA) organism testing, not "living" - stricter than IMO. Most UV systems re-tested for USCG approval. Chemical biocide (MPN) available but with residual control needs.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| BWM Convention performance standard | - | IMO BWMC |