Category: Standards & Compliance

বাংলা সংস্করণ পড়ুন

A factory’s water system serves several purposes at once: drinking, toilets, production, cooling, and emergency services. A clear drawing should show which system serves each purpose and how contamination is prevented. Bangladesh National Building Code (BNBC) 2020 provides the building-services context for that work.

Where to start reading

Begin with Part 8, Chapter 5, Water Supply, and Chapter 6, Sanitary Drainage. The gazetted code covers building water supply, plumbing, sanitation, and drainage responsibilities. Industrial effluent treatment also requires the applicable environmental rules and clearance conditions. Confirm the occupancy, approved design, and relevant authority requirements before selecting a provision or table.

Review three connected drawings

Protect the potable network from cross-connections. Where treated wastewater is proposed for suitable non-potable uses, show a separate, identifiable system and the required protective arrangements. Verify the water-quality requirement at the actual point of use; a compliant STP outlet does not by itself establish safe drinking water.

Keep the design basis visible

• Use the approved occupancy and applicable code criteria for water demand and sanitary facilities. Record the source and clause for every allowance.
• Distinguish daily volume, peak flow, storage, pump duty, pipe sizing, and treatment capacity. They answer different design questions.
• Review the effects of added floors, production, shifts, or staff on the existing system.
• Keep as-built drawings, inspection access, maintenance instructions, test records, and responsible persons together.

Try a drawing walk-through

Choose one drinking-water tap and one toilet. Trace each back to its supply source and forward to its drainage destination. Mark every uncertainty for verification on site. This simple exercise often makes a complicated drawing much easier to understand. Design approval and specialist checks should follow the relevant authority’s process.

The official gazette records BNBC 2020 under S.R.O. No. 55-Law/2020, published 11 February 2021. Use the complete gazetted document, including the relevant tables, appendices, definitions, and any applicable amendments.

Official sources and further reading

• BNBC official gazette record
• HBRI building code downloads

Related practical resources

ECR 2023 downloads · Excel workbooks and checklists · RSC Safety for ETP, STP and WTP · ISO for Water and Wastewater Management

Practice downloads

Use the bilingual PDF worksheets in print or alongside the editable Excel files. Examples are for learning; adapt the records to the approved procedures and requirements at your site.

• Environmental aspects and compliance register (PDF · English / বাংলা)
• 3R water planning and permissions worksheet (PDF · English / বাংলা)

Bangladesh Water Act, Water Rules and WARPO · 3R Water Planning in the Textile Industry · Environmental Aspects and Impacts in Treatment Plants

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বাংলা সংস্করণ পড়ুন

A wastewater report becomes more useful when the plant team can explain the story behind it: what entered production, how the ETP operated, where the samples were collected, and what happened to the sludge. ZDHC helps connect those parts of wet processing. Use it alongside Bangladesh’s legal requirements and the requirements agreed with the buyer.

Start with the correct scope

The wastewater and sludge programme addresses relevant textile, apparel, leather, and footwear wet-processing suppliers. Identify the facility’s discharge arrangement before selecting a testing package: direct discharge, an applicable indirect-discharge category, or zero liquid discharge. A sewing-only facility’s separate domestic sewage should not automatically receive the same scope as a dyeing ETP. The industrial wastewater flow threshold affects programme requirements; it does not create an exemption from Bangladesh law.

Keep the requirement and its basis together

Foundational, Progressive, and Aspirational results belong to a defined parameter and programme scope. Keep the legal compliance matrix separate and compare requirements only when their sampling basis, units, and receiving route are comparable. A good ZDHC result alone does not establish drinking-water safety or suitability for every reuse application.

Turn a result into a practical investigation

• Pair the laboratory report with production, flow, pH, dosing, aeration, and sludge-handling records from the sampling period.
• For an unexpected substance, trace the relevant chemical inputs and process changes before changing ETP dosing.
• For a conventional parameter, check loading, treatment performance, sampling, and laboratory information together.
• Use the official ETP Assessment material to connect process design, operational control, and team competence.

A short exercise

For an illustrative day, 300 m³ of effluent at 200 mg/L COD carries 60 kg COD. Calculate the load from your own verified flow and sample basis, then explain why concentration alone cannot describe the day’s total discharge. The numbers here are a calculation example, not a prescribed limit.

Edition and reporting check

Checked 14 November 2026: the official digital programme identifies V1 as active and says V2 replaces it from 1 December 2026, when its implementation period starts. Use the active edition for the reporting cycle and retain the applicable transition instructions. Open the official programme for current sampling, laboratory, reporting, and sludge requirements.

Official sources and further reading

• Active wastewater and sludge programme
• Sampling and testing scope
• Sludge disposal documentation
• Output and ETP Assessment

Related practical resources

ECR 2023 downloads · Excel workbooks and checklists · Higg FEM for Water and Wastewater · ISO for Water and Wastewater Management

Practice downloads

Use the bilingual PDF worksheets in print or alongside the editable Excel files. Examples are for learning; adapt the records to the approved procedures and requirements at your site.

• Environmental aspects and compliance register (PDF · English / বাংলা)
• HIRA and environmental aspect registers — Excel (.xlsx)

Bangladesh Water Act, Water Rules and WARPO · 3R Water Planning in the Textile Industry · Environmental Aspects and Impacts in Treatment Plants

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