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
- Hathaikheda dam / kund (rank 6): moderate historical concern; urgent re-test.
- BOD 22 mg/l — 2024 Ganesh, one week after.[1]
- pH 9.2 — 2024 Durga, pre-immersion.[2]
- DO < 5 in 0/18 readings; BOD > 3 in 16/18; pH outside 6.5–8.5 in 3/18.
- Recurring: 6/6 sampled festival windows; 6 of 19 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
- Hathaikheda dam / kund: 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 2024 p.71, CSV L973
- [2] MPPCB 2024 p.23, CSV L527
- 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: [ ]