PUBLIC KNOWLEDGE · ENVIRONMENTAL RESPONSIBILITY
Environment Conservation Rules, 2023 — an independent, unofficial English translation by Engr. Arif Anwar. Free access for engineers, plant operators, students, laboratories, industry teams, and colleagues who work across languages.
The 107-page translation follows gazette pages 3009–3115. Each English page contains the corresponding Bangla page’s material. Flags [S1]–[S8] identify unresolved source inconsistencies.
Download the translation
Read the original Bangla gazette on the Government Press website · Open the water-quality schedules · See unresolved source issues
Dates: Notification: March 2, 2023; gazette publication: March 5, 2023; translation revision: November 12, 2026. The Bangla gazette is the controlling source. This translation does not represent government approval or an amendment to the rules.
Why I translated it
I believe that an engineer’s responsibility extends beyond delivering a plant or obtaining a certificate. The requirements intended to protect our environment and public health should be understandable to the people who design, operate, test, and manage treatment systems.
Bangladesh’s ECR 2023 was published in Bangla. That is our own language, but our engineering work also involves international colleagues, equipment suppliers, technical reports, and training in English. A language barrier should not become a barrier to responsible environmental practice.
My purpose in preparing and sharing this translation is to make useful knowledge freely available, especially to young engineers and ETP operators. A wrong chemical name, unit, number, or inequality can misdirect a design, a laboratory test, or a compliance decision. Technical accuracy is therefore a moral obligation in this work.
That same obligation requires honesty about the original text. Where the gazette itself is ambiguous or internally inconsistent, I have retained and flagged the issue. I have not invented a replacement limit or silently rewritten a regulatory requirement.
What changed from ECR 1997?
The 2023 rules replaced the 1997 rules through rule 40, with savings for earlier actions and approvals. The changes go beyond renaming categories. The comparison below uses the published 2023 gazette and the referenced 1997 compilation, which includes the listed 2002/2003 amendments.
| Topic | ECR 1997 | ECR 2023 |
|---|---|---|
| Industry categories | Green, Orange-A, Orange-B, Red. | Green, Yellow, Orange, Red; revised industry lists and Schedule-14 classification criteria. Recheck the activity and threshold; do not assume a one-to-one renaming. |
| Clearance validity | Green: 3 years; other categories: 1 year (rule 8). | Green: 5 years; Yellow: 2 years; Orange and Red: 1 year (rule 20). |
| General industrial discharge to inland surface water | BOD₅: 50; SS: 150; COD: 200 mg/L (Schedule-10). | BOD₅ at 20 °C: 30; SS: 100; COD: 200 mg/L (Schedule-4). Some limits tightened; COD in this comparison stayed the same. |
| Receiving-environment columns | Inland surface water; public sewer with secondary treatment; irrigated land. | Inland surface water; public sewer with secondary treatment; marine coastal area. The third columns have different scopes. |
| TDS: an important scope change | The general Schedule-10 table lists TDS at 2,100 mg/L. | The general Schedule-4 table has no TDS row. The textile Schedule-5 table retains 2,100 mg/L with a footnote. Do not treat an old general checklist as a universal 2023 limit. |
| Sewage discharge | BOD: 40 mg/L; no COD row in Schedule-9. | BOD₅ at 20 °C: 30 mg/L; COD: 125 mg/L (Schedule-3). |
| Drinking-water lead | 0.05 mg/L (Schedule-3). | 0.01 mg/L (Schedule-2). |
| Assessment and treatment documentation | IEE, EIA, EMP, and ETP requirements already existed. | Dedicated guidance in Schedules 10–12; consultant/expert enlistment under rules 37–38 and Schedule-13; revised forms, fees, and procedures. |
Read the sources: 2023 gazette (rules 20, 37–40; Schedules 2–5 and 10–14) and 1997 rules in the FAOLEX compilation (rules 7–8; Schedules 3, 9–10). Industry-specific standards and applicable clearance conditions matter. These examples do not mean every 2023 limit became stricter.
Technical terms that must stay precise
| Term | How to read it |
|---|---|
| COD / BOD / DO | Chemical oxygen demand / biochemical oxygen demand / dissolved oxygen. They describe different quantities. BOD₅ at 20 °C retains the specified incubation time and temperature. |
| TDS / SS / TSS | Total dissolved solids / suspended solids / total suspended solids. The translation retains SS where the gazette uses SS; it does not silently substitute TSS. |
| Nitrogen and phosphorus bases | A value reported as N or as P is not numerically interchangeable with a value reported as NO₃ or PO₄. Preserve the reporting basis and units. |
The COD figures in Schedule-14 are classification criteria, not treated-effluent discharge limits. A classification band must not be copied into an ETP outlet guarantee.
Issues still present in the 2023 Bangla gazette
The following flags identify issues in the source itself. They are distinct from mistakes corrected in the English translation. Page numbers below are printed gazette numbers.
| Flag | Gazette page(s) | Source issue and treatment in the translation |
|---|---|---|
| S1 | 3062 | The Bangla coastal-water parameter name says nitrite nitrogen, but the printed formula NO₃–N denotes nitrate nitrogen. The conflict is flagged; the intended analyte needs clarification. |
| S2 | 3077 | The source prints “Carbonyl.” This is a functional-group term and does not uniquely identify a pesticide. The translation retains it; substitution with carbaryl would be a guess. |
| S3 | 3077 | The source prints “Proponil.” Propanil may be intended, but that identity is unconfirmed. The printed name is retained and flagged. |
| S4 | 3113–3115 | COD bands read Green <400, Yellow ≥700, Orange >700 and <1500, and Red >1500 mg/L. They overlap and leave gaps, including the exact 1500 boundary. The inequalities are preserved. “Toxic” and “non-toxic” remain source classification terms. |
| S5 | 3061 | Irrigation boron is printed as below 0.1%, without specifying the percentage basis. The anomalous source expression is retained; no mg/L conversion or replacement is invented. |
| S6 | 3015, 3020, 3069, 3109, 3114 | Questionable internal references are retained and flagged: rule 13(3) cites (9); rule 18(4) cites (2), and 18(6) cites (3); Schedule-4 condition 6 cites paragraphs 5 and 6; Schedule-12 clause 5(c) cites serial (3), clauses (a) and (b); the Green remarks omit a referenced serial number. |
| S7 | 3071 | The phosphatic-fertilizer SS row specifies the chromate-removal plant outlet. This unusual sampling point is explicitly in the source and is retained. |
| S8 | 3048, 3050, 3055, 3059 | Motor-repair workshop capital bands overlap between Green (20–50 lakh Taka) and Yellow (above 20 lakh). Port construction bands also overlap: Orange up to 50 lakh metric tons/year; Red above 30 lakh. The source thresholds are retained. |
Check these entries against the original gazette and the matching pages of the English PDF. Resolving the intended regulatory meaning requires clarification from the competent authority; a translator cannot supply that authority.
My practical view
The update deserves careful implementation. My priority is a shared, technically sound understanding among plant teams, designers, laboratories, and compliance staff. Keep parameter names, reporting bases, receiving environments, and sector-specific standards together when building a compliance matrix. Where a source flag affects a decision, seek written clarification instead of designing around an assumption.
If you identify an error, please send the gazette page, parameter, and supporting source. Specific, evidence-based corrections help everyone who uses the document.
Translator: Engr. Arif Anwar · বাংলা পাতা · Back to Home