Optimize Your ETP & STP Performance with Precision

Environmental compliance isn’t just about checking boxes—it’s about staying one step ahead. Whether you’re managing daily operations, preparing for audits, or submitting Form-V, accuracy is everything. That’s why we’ve created this free suite of ETP/STP calculators—designed especially for EHS professionals, plant managers, and environmental consultants.

ETP & STP Calculators for Form-V help you quickly:

• Measure treatment efficiency
• Monitor pollutant loads
• Optimize chemical dosing
• Prepare compliance reports like Form-V and water balance sheets

All calculators follow industry-accepted formulas and are crafted to give instant clarity, reduce manual errors, and save valuable time during compliance reporting.

🔍 About ETP & STP Calculators for Form-V Calculators

• ✅ No login required
• ✅ Free to use – created by Perfect Pollucon Services’ compliance experts
• ✅ Easy to understand & mobile-friendly
• ✅ Based on MPCB & CPCB guidelines
• ✅ More calculators coming soon!

💧 ETP & STP Calculators for Form-V: ETP Efficiency Calculator

Description:

The ETP Efficiency Calculator helps evaluate the performance of your Effluent Treatment Plant by calculating the percentage removal efficiency of key pollutants like BOD, COD, or TSS. It helps identify whether your treatment process is working within the norms prescribed by regulatory bodies such as MPCB.

Formula:

Efficiency (%) = [(Inlet – Outlet) / Inlet] × 100

Use Cases

• Quickly assess plant performance during audits or daily checks.
• Demonstrate compliance with regulatory discharge norms.
• Identify operational issues or need for chemical dosing adjustments.
• Helps in preparing Form-V environmental statement reports.

💧 ETP Inlet Load Calculator

Description:

The ETP Inlet Load Calculator estimates the daily pollutant load (in kg/day) entering your Effluent Treatment Plant. It calculates the mass of contaminants like BOD, COD, or TSS based on flow rate and concentration.

This value is essential to assess whether the treatment plant is receiving a load within its design limits and to plan for performance optimization or upgrades.

Formula:

Pollutant Load (kg/day) = Flow (m³/day) × Concentration (mg/L) × 0.001

Use Cases:

• Monitor if ETP is being under or over-loaded
• Evaluate capacity utilization of your treatment system
• Identify high pollution days or peak loading issues
• Required for Form-V, consent renewal, and environmental audits

⚗️ ETP & STP Calculators for Form-V: Chemical Dosing Calculator (Alum / Lime / Ferric)

Description:

This Chemical Dosing Calculator helps you determine the quantity of coagulants (like Alum, Lime, or Ferric Chloride) required for your ETP/STP based on your flow rate and target dosage.

It’s essential for maintaining treatment efficiency, avoiding under/overdosing, and ensuring consistent pollutant removal without unnecessary chemical costs.

Formula:

Dosing Required (kg/day) = Flow (m³/day) × Dosage (mg/L) × 0.001

Use Cases:

• Plan daily chemical requirements based on actual flow
• Optimize procurement and inventory of treatment chemicals
• Avoid manual errors in shift logbooks
• Support budget estimation and operational cost tracking

🚰 Water Balance Calculator

Description:

The Water Balance Calculator helps industries and commercial units estimate and visualize their daily water usage, recycling, and discharge. It’s crucial for preparing water balance diagrams for MPCB consents, Form-V submissions, and sustainability reports.

Formula:

Water Used = Fresh Water + Recycled Water
Water Discharged = Total Used – Reused in Process

Use Cases:

• Generate water budget for MPCB consent/renewal
• Evaluate % of treated water reuse vs discharge
• Justify ETP/STP capacity and recycling claims
• Aid in Form-V and ESG documentation

🧪 Sludge Volume Index (SVI) Calculator

Description:

The Sludge Volume Index (SVI) Calculator helps you assess the settleability of activated sludge in the aeration tank. It’s a key indicator of whether your biological treatment is working efficiently and if there are problems like sludge bulking or poor settling.

Formula:

SVI (mL/g) = Settled Sludge Volume (mL/L) / MLSS (g/L)

Use Cases:

• Diagnose sludge bulking or filamentous growth
• Tune return sludge flow (RAS) settings
• Prevent clarifier overflows or carryover
• Maintain stable biological treatment in ETP/STP

🌊 ETP/STP Overflow Risk Estimator

Description:

This calculator helps estimate whether your ETP/STP tank is at risk of overflowing based on incoming flow, tank volume, and retention time. It’s especially helpful during monsoons or when production increases temporarily.

Formula:

Risk = Inlet Flow × Retention Time > Tank Volume → High Risk

Use Cases:

• Predict overflow risk during peak load or rain
• Adjust pumping rate or operating time accordingly
• Prevent environmental violations and property damage
• Useful during audits or HAZOP studies

🚨 Discharge Norm Violation Predictor

Description:

This calculator helps you predict if your treated effluent or sewage discharge may violate MPCB discharge limits based on recent lab results or daily sampling. It uses a running average approach to identify potential risks before a violation is reported.

Formula:

Average Concentration = (Value₁ + Value₂ + … + Valueₙ) / n
Compare Average vs Limit → Predict Violation

Use Cases:

• Proactive compliance before lab audit or sample pickup
• Detect quality drift in COD/BOD/TSS over time
• Prevent environmental notices and consent complications
• Use for weekly internal self-checks

💸 Recycled Water ROI Calculator

Description:

This calculator helps EHS professionals estimate the cost savings and return on investment (ROI) from reusing treated water instead of consuming fresh municipal or borewell water. It’s especially valuable when proposing sustainability upgrades, STP recycling systems, or for green building certifications.

Formula:

Monthly Savings = Recycled Water Used (m³) × Fresh Water Rate (₹/m³)
ROI (%) = (Monthly Savings × 12) / Annual Recycling System Cost × 100

Use Cases:

• Justify STP/ETP reuse projects to top management
• Prepare for ISO 14001, ESG, or green audits
• Highlight CSR/environmental impact
• Compare recycling investment vs tanker/fresh water costs

💰 ETP/STP Operational Cost Estimator

Description:

This calculator estimates the monthly and annual operational cost of running your ETP or STP based on electricity usage, manpower, chemical consumption, and lab testing frequency. It’s a go-to tool for budgeting, vendor comparisons, and internal planning.

Formula:

Total Cost = Power Cost + Manpower + Chemicals + Testing Charges

Use Cases:

• Create an annual ETP/STP O&M budget
• Compare costs across facilities or vendors
• Justify automation to reduce operating cost
• Use for ISO 14001, sustainability & finance planning

🏗️ ETP/STP Capacity Expansion Justifier

Description:

This calculator helps you assess whether your current ETP/STP capacity is sufficient based on peak daily flow, MPCB consented flow, and actual plant capacity. It flags overload risks and estimates required expansion.

Formula:

• Overload (%) = (Peak Flow – Plant Capacity) / Plant Capacity × 100
• Consent Gap = Peak Flow – MPCB Consented Quantity

Use Cases:

• Predict overload conditions based on production growth
• Support AMC renegotiation or plant expansion proposals
• Avoid MPCB violations from exceeding consented flow
• Build ROI cases for civil/mechanical upgrades

🧱 Sludge Generation Estimator

Description:

This calculator estimates the quantity of sludge generated in your ETP or STP based on daily flow, percentage of suspended solids removed, and assumed solids content in dewatered sludge. It helps plan de-sludging, transport, and filter press schedules.

Formula:

Sludge (kg/day) = Flow × SS Removed (mg/L) × 0.001
Dewatered Sludge (m³/day) = Sludge (kg/day) / Solids % / 1000

Use Cases:

• Estimate daily or weekly sludge volume for planning
• Schedule de-sludging and disposal
• Forecast hazardous waste quantities for Form-3
• Avoid overflow in sludge drying beds or filter press backlog