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).

Ballast WaterBWM

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\begin{array}{l} N_{\geq 50\mu m} \leq 10 \text{ per m}^3 \ N_{10-50\mu m} \leq 10 \text{ per mL} \end{array}

Symbol	Meaning	Unit
$≥50 µm$	Zooplankton-sized organisms	per m³
$10–50 µm$	Microalgae-sized organisms	per mL
$E. coli / Enterococci / V. cholerae$	Indicator microbes	cfu/100 mL

Source: BWM Convention Regulation D-2; MEPC.300(72) BWMS Code

BWM Convention D-2 limits for treated ballast water: \u2264 10 viable organisms/m\u00b3 (\u2265 50 \u00b5m) and \u2264 10/mL (10\u201350 \u00b5m).