D-2 Discharge Compliance Check
BWM Convention D-2 limits for treated ballast water: ≤ 10 viable organisms/m³ (≥ 50 µm) and ≤ 10/mL (10–50 µm).
Organisms ≥ 50 µm
PASS
Organisms 10–50 µm
PASS
E. coli (≤ 250)
PASS
Enterococci (≤ 100)
PASS
V. cholerae (< 1)
PASS
Formula, assumptions, and limits
BWM Convention Regulation D-2. BWMS approved per MEPC.300(72) BWMS Code must meet these limits under type-approval test conditions. Ships fully D-2 compliant by 8 September 2024 (transition now complete).
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Zooplankton-sized organisms | per m³ | sample + count | |
| Microalgae-sized organisms | per mL | sample + count | |
| Indicator microbes | cfu/100 mL | microbiological assay |