NeerSetu officer brief - pre-visarjan testing priorities
MPPCB monitoring 2023–2025 · not live · for officer and technical review.
1. Purpose
- Prioritise fresh testing and inspection before Durga visarjan (20 Oct 2026). Scope: 2023–2025 · Ganesh + Durga · all phases.
2. Observed historical evidence
- Shahpura lake ghat (rank 3): moderate historical concern; urgent re-test.
- DO 2.5 mg/l — 2025 Durga, pre-immersion.[1]
- BOD 11.6 mg/l — 2024 Durga, one week after.[2]
- DO < 5 in 5/18 readings; BOD > 3 in 18/18; pH outside 6.5–8.5 in 0/18.
- Recurring: 6/6 sampled festival windows; 8 of 23 outside readings were pre-immersion.
3. What remains unknown
- Historical (2023–2025) only — current water quality unknown; units assumed.
- Coliform not measured, so Class B compliance cannot be stated; 2026 authorisation unverified.
- Phase differences alone do not establish the effect of immersion.
4. Proposed actions for officer / technical review
- Shahpura lake ghat: fresh DO, BOD and pH samples before 20 Oct, during immersion and one week after.
- Inspect for cleaning needs; refer aeration or treatment decisions to the technical team.
5. Sources
- [1] MPPCB 2025 p.65, CSV L1499
- [2] MPPCB 2024 p.26, CSV L739
- Screening: CPCB Class B (bathing) — DO ≥ 5 mg/l, BOD ≤ 3 mg/l, pH 6.5–8.5. A comparison, not a legal designation.
Reviewed by officer: [ ]