The 8 chapters that water supply engineers open most — LPCD, distribution design, treatment, and operations.
| Chapter | Title | Category | Key search |
|---|---|---|---|
| Ch. 1 | Introduction and Design Considerations | Planning | design period |
| Ch. 2 | Population Forecasting for Water Supply Design | Planning | population forecasting |
| Ch. 3 | Water Demand, LPCD Standards, and Peak Factors | Demand | lpcd |
| Ch. 4 | Water Quality Standards and Monitoring | Quality | water quality |
| Ch. 5 | Sources of Water — Surface and Groundwater | Sources | water source |
| Ch. 6 | Intake Structures for Water Supply | Sources | intake structure |
| Ch. 7 | Water Transmission — Raw and Treated Water Mains | Transmission | transmission main |
| Ch. 8 | Water Treatment — Conventional Processes | Treatment | water treatment |
| Ch. 9 | Disinfection — Chlorination and Alternatives | Treatment | chlorination |
| Ch. 10 | Advanced Water Treatment — Membrane, Ion Exchange, Defluoridation | Treatment | reverse osmosis |
| Ch. 11 | Distribution System Design — Network, Pressure, Velocity | Distribution | distribution network |
| Ch. 12 | Service Reservoirs and Storage Capacity | Distribution | service reservoir |
| Ch. 13 | Pumps and Pumping Stations | Distribution | pump |
| Ch. 14 | Rural Water Supply — Jal Jeevan Mission Design | Rural | rural water supply |
| Ch. 15 | Pipe Materials and Fittings | Materials | pipe material |
| Ch. 16 | Valves and Appurtenances | Valves | sluice valve |
| Ch. 17 | Water Meters and Flow Measurement | Ops & SCADA | water meter |
| Ch. 18 | Leak Detection and Non-Revenue Water Management | Ops & SCADA | leak detection |
| Ch. 19 | Operation and Maintenance of Water Supply Systems | Ops & SCADA | operation maintenance |
| Ch. 20 | SCADA, Instrumentation, and Smart Water Systems | Ops & SCADA | scada |
The CPHEEO Manual on Water Supply and Treatment (3rd edition 1999, with 2024 revision updates) is the authoritative reference for water supply engineering in India. It consolidates design standards, construction specifications, and operational guidance across the full water supply chain — source, intake, treatment, transmission, storage, distribution, and consumer service.
Coverage spans urban piped water supply (135 lpcd standard with sewerage, 70 without, metros 150-200 lpcd), rural water supply under Jal Jeevan Mission (55 lpcd per BIS 1172:2012 — superseded the older 40 lpcd), water treatment processes (coagulation with alum at 20-40 mg/L typical, flocculation, sedimentation at 1.0-2.5 m/hr surface loading, rapid sand filter at 5-7 m/hr, slow sand filter at 0.1-0.3 m/hr, chlorination with 1-2.5 mg/L dose), pipe materials and sizing (DI grades K7/K9/K12, HDPE PN ratings, MS cement-lined for large mains), transmission and distribution hydraulics (Hazen-Williams with C=130 for new DI, velocity 0.6-2.4 m/s range), service reservoirs (33% of daily demand storage, IS 3370 structural), pumping stations (TDH calculation, NPSH, VFD for energy efficiency, specific energy 0.25-0.50 kWh/m³), and modern operations (DMA-based NRW management, SCADA, smart meters, AMR).
Every Indian water utility — municipal, rural, industrial — references this manual. Consultants preparing DPRs for AMRUT 2.0, JJM, or Smart City Mission cite it extensively. The new 2024 revision aligns with 24×7 supply goals, modern membrane technologies, climate resilience, and smart water infrastructure.
The manual is not read cover-to-cover — it's a reference for specific design decisions. Common lookup patterns: *What is the maximum velocity in a distribution main?* (Chapter 11: 2.4 m/s). *What is the peak factor for rural distribution?* (Chapter 14: 3.0). *What alum dose for clear river water?* (Chapter 8: 20-40 mg/L for 50-200 NTU, confirm via jar test). *What residual chlorine at consumer tap?* (Chapter 9: 0.2 mg/L minimum, 0.5 at WTP outlet). *How to calculate pump kW?* (Chapter 13: P = Q × H / (367 × η)). *What is rural design LPCD under JJM?* (Chapter 14: 55 lpcd per BIS 1172:2012).
InfraLens structures every chapter so these questions are answerable in seconds — key formulas block at top, numeric values table, clause-level references, and practitioner notes that capture what goes wrong in Indian field conditions. The FAQs at the bottom of each chapter mirror the queries that AMRUT, JJM, and Smart City consultants actually get asked during DPR review meetings.
For DPR consultants: use this manual alongside IS 10500 (drinking water quality), IS 3370 (liquid retaining structures for reservoirs), IS 1172 (rural water supply standard), and CGWB guidelines for groundwater. For utility operations teams: the O&M (Chapter 19), NRW (Chapter 18), and SCADA (Chapter 20) chapters are the most directly actionable — supporting daily decisions on leak detection, pressure management, energy optimization, and SCADA alarms.
15 common questions about this topic, answered by civil engineers.
The authoritative Government of India technical manual for water supply engineering, published by Central Public Health and Environmental Engineering Organisation (CPHEEO) under Ministry of Housing and Urban Affairs. Current 3rd edition (1999) with 2024 revision updates. Mandatory reference for AMRUT, Jal Jeevan Mission, Smart City Mission, and all municipal/rural water schemes.
LPCD = Litres Per Capita per Day — daily water supply per person. CPHEEO values: 135 lpcd urban with underground sewerage, 70 lpcd urban without sewerage, 55 lpcd rural per BIS 1172:2012 (adopted by JJM — supersedes older 40 lpcd CPHEEO value). Metros (Delhi, Mumbai) 150-200 lpcd due to higher standard of living. See Chapter 3 for peak factor details.
2.4 m/s maximum per CPHEEO Chapter 11. Typical design 1.0-1.8 m/s. Above 2.4 m/s causes pipe erosion, water hammer, and excessive pumping energy. Minimum 0.6 m/s to prevent sediment deposition. For transmission mains (Chapter 7), range 0.6-2.5 m/s, with 1.0-1.5 m/s economic optimum.
70 m water column (7 bar) maximum operating pressure per CPHEEO Chapter 11. Above this, break network into pressure zones using PRVs (Pressure Reducing Valves). Minimum residual pressure: 7 m at consumer (30 ft), 17 m at ferrule (55 ft — allows 2-3 storey supply without booster). Hilly cities (Mumbai) have multiple pressure zones.
Minimum 0.2 mg/L at farthest consumer point per CPHEEO Chapter 9 and IS 10500:2012. At WTP outlet: 0.5-1.0 mg/L. Contact time minimum 30 minutes. Chlorine dose typically 1-2.5 mg/L (demand 0.5-1.5 + residual 0.5-1.0). Below 0.2 mg/L indicates contamination risk — investigate immediately.
55 lpcd per BIS 1172:2012, adopted by Jal Jeevan Mission. Supersedes earlier 40 lpcd CPHEEO value (Chapter 14). 55 lpcd provides water for drinking, cooking, bathing, washing, cattle. JJM target: 100% FHTC (Functional Household Tap Connections) by 2024 — ~75% achieved as of early 2024.
2.5-3.0 for intermittent supply (2-6 hrs/day, typical Indian); 1.3-1.8 for 24×7 supply (target of JJM/AMRUT). Peak hour demand = 2.5-3.0 × average hourly demand. Distribution pipes sized for peak, not average. Source/raw water mains peak factor 1.0 (continuous abstraction). Rural peak factor 3.0 (concentrated morning/evening usage).
20-40 mg/L typical for surface water with turbidity 50-200 NTU per Chapter 8. Range 10-80 mg/L depending on season (monsoon turbid water needs more). Determine optimum by jar test — not just table lookup. PAC (polyaluminium chloride) alternative requires 30-50% less dose, less sludge. Lime 20-50 mg/L for pH correction.
Pipe-specific coefficient in Hazen-Williams equation: new DI 130-140, aged DI 100-110; new steel 140; HDPE 150, PVC 150; concrete 130; aged cast iron 60-80. Used in Q = 0.278 × C × D^2.63 × S^0.54. Verify existing main C before adding flow — older systems operate at lower C.
33% of daily demand rule of thumb (Chapter 12) — equals balancing storage (25-35%) + fire storage (4-hr fire demand) + emergency storage (4-8 hr average demand). ESR staging height provides 17 m residual at farthest ferrule after friction losses. Structural per IS 3370 — M30-M40 concrete, crack width < 0.1 mm.
P (kW) = Q (m³/hr) × H (m) / (367 × η) per Chapter 13. Example: 200 m³/hr at 50 m TDH with 75% efficiency = 36.3 kW. TDH = static lift + friction loss + residual pressure. Efficiency target 80% new pumps; declines to 60-70% over 5 years — replace when < 70% for payback via energy savings.
Non-Revenue Water = produced water not billed (leakage + theft + metering error). Indian urban average 35-45%; world-class < 10%; AMRUT/JJM target < 20%. Reduce via DMA establishment, pressure management (PRVs), leak detection (acoustic), pipe replacement. Bangalore BWSSB saved 250 MLD via 49%→35% NRW reduction.
Network zone (4-8 km²) hydraulically isolated with single bulk meter inlet (Chapter 18). Enables flow-imbalance analysis — if inlet flow > sum of consumer meters, difference = leakage. Also enables zone-level pressure management (via PRVs). Fundamental building block of modern water utility operations under AMRUT 2.0.
Hydraulic Loading Rate 5-7 m/hr per Chapter 8. Sand 600-750 mm deep, effective size 0.4-0.7 mm, plus gravel underlayer 300-500 mm. Filter run 24-48 hours between backwash. Backwash rate 36-48 m/hr for 5-10 minutes. Slow Sand Filter (SSF) alternative: HLR 0.1-0.3 m/hr, no chemicals needed, 20× larger footprint.
CPHEEO manual provides design methodology; IS codes provide material and testing standards. Key cross-references: IS 10500 (drinking water quality), IS 3370 (liquid retaining concrete structures), IS 1172 (rural water supply), IS 8329 (DI pipes), IS 3589 (MS pipes), IS 4984 (HDPE), IS 4985 (PVC), IS 779 (water meters). CPHEEO is the manual; IS codes are the standards it references.