Pulp and Paper Dye Reduction Guidelines

Summary#

The federal Minister of the Environment has issued the amended Guidelines for the Reduction of Dyes Released from Pulp and Paper Mills under the Canadian Environmental Protection Act, 1999. Published in the Canada Gazette on April 6, 2024 (signed March 16, 2024), the Guidelines set targets and good practices to limit certain dye releases from pulp and paper mills and describe monitoring and reporting steps for mill operators.

What it does#

• Applies to mills that use any of these dyes: MAPBAP acetate, Malachite Green (MG), Basic Violet 3 (BV3), Basic Violet 4 (BV4), and Basic Blue 7 (BB7).
• Sets product and wastewater performance targets:
  • Minimum dye retention on the final paper product: 90% for MAPBAP acetate; 95% for MG, BV3, BV4, and BB7.
  • Minimum solids removal efficiency in primary wastewater treatment: 75%.
• Requires containment and handling measures to avoid accidental releases, including secondary containment sized at 110% of a single tank’s capacity, or 100% of the largest tank plus 10% of the capacity of other tanks.
• Lays out monitoring, record-keeping and reporting rules:
  • Operators should measure conformance annually and keep records for at least five years.
  • Operators must notify the Minister of the Environment in writing within six months of initial use of MAPBAP acetate, and for the other dyes either within six months after initial use or within six months after the final publication of the 2024 amended Guidelines.
  • First conformity reports for MG, BV3, BV4 and BB7 are due three years after the final publication; MAPBAP acetate has a different timing (exempt from that three‑year first report).
• Provides a proposed lab method to measure dye retention (Appendix 3) and templates for the operator declaration and conformity report (Appendices 4 and 5).
• Notes the Guidelines are meant to complement the Pulp and Paper Effluent Regulations (the primary federal rules under the Fisheries Act) and recommends that appropriate regulators adopt these Guidelines as baseline standards; local conditions or technology changes could warrant stricter measures.

Who's affected#

• Primary: operators of pulp and paper mills that use any of the listed dyes. They will be expected to follow the retention, containment, monitoring and reporting guidance.
• Secondary: suppliers of dye-containing products (mills must confirm presence of dyes), wastewater treatment operators at mills, and regulatory agencies that might adopt the Guidelines as enforceable standards.
• Nearby communities, fisheries and downstream water users may be affected by any change in dye discharges, though the document itself is guidance rather than an immediate regulation.

Why it matters#

• Dyes from mills can color waterways and affect aquatic life, recreation and local water quality. The Guidelines aim to reduce those dye releases through measurable targets and better handling.
• The guidance gives mills concrete targets and testing methods so they can make practical changes — for example, switch supplies, improve primary treatment, or strengthen storage to prevent spills.
• Although the Guidelines themselves are advisory, regulators can adopt them as binding standards; if adopted, they could lead to stricter requirements for mills and clearer public reporting about dye releases.