GREETINGS FROMHYDERABAD METROPOLITAN WATER SUPPLY AND SEWERAGE BOARD
HMWSSB Service area - 688.2 sq.kms GHMC area - 518.9 Sq.Kms Erstwhile MCH area - 169.3 sq.kms
SNAP SHOT DETAILS OF WATER SUPPLY• Present Population : 6.74 Millions City and surrounding Municipalities• Service Area : 680 SqKm• No of Connections : 5.3 Lakhs.• No of Employees : 5300.• Total Supply Quantity : 263 MGD.• Bulk Supplies to Surrounding Municipalities : 70 MGD• Duration of Supply : 2.0 Hours on alternate day• Monthly Revenue : 21 Crores
HISTORY HUSSAIN SAGAR• The first source of water supply to Hyderabad is Hussain Sagar Lake.• The Lake was constructed in 1578 AD.• In 1891 a Slow sand filter was setup in Narayanaguda• The water of this lake served the drinking water needs up to around 1930.
DRINKING WATER MEASUREMENT UNITS• 1 MLD - One Million Liters Per Day (10 Lakh Liters)• 1 MGD - One Million Gallons Per Day ( 45.4 Lakh Liters)• LPCD - Liters Per Capita Per Day• WHO Norms for One Human Being Water Consumption - 165 LPCD
WATER SOURCES OF HYDERABAD OSMANSAGAR Commissioned in 1920 for 25 Mgd
KODANDLA PUR WTPKRISHNA DRINKING WATER SUPPLY PROJECT
SALIENT WATER SUPPLY INFRASTRUCTURE DETAILS• No. of WTPS - 6 Nos (1568 MLD)• No of Primary Pumping Stations - 12 Nos• No. of Master Balance Reservoirs - 10 Nos• No. of Service Reservoirs - 70 Nos• Length of Transmission Mains - 570 KM• Length of Distribution Mains - 2200 KM
SALIENT SEWERAGE INFRASTRUCTURE DETAILS Trunk & Main Sewers of 600 mm dia & above - 572 Km Lateral Sewers – 300 mm dia & below - 1900 Km Existing Treatment Facilities - i) Primary treatment at Amberpet - 113 Mld ii) Secondary Treatment Plant at HS Lake - 20 Mld
Reasons for ground water depletion• Increasing demand• With drawing more than recharge• Reduction of recharge area due to buildings, paved paths and roads• Diminishing surface water bodies• Uncertain rainfall
Techniques to improve ground water throughrainwater harvesting• Creation of recharge pits, trenches and shafts in building, open spaces, parks and along roads• Use of existing dry well as recharge structure• Rooftop rain water should be channeled into storage tanks, sumps etc. for direct use• Protection and conversion of open areas, parks, and surface water bodies• Afforestation under clean and green programme
Rooftop rainwater stored in Ferrocement tank (popular in Bangladesh)
USAGES OF RECYCLED WATER• Recycled water is to be treated to meet the requirements of specific usages• For residential usage, it is to be treated to higher quality standards• Flushing toilets• Watering gardens• Washing cars• Ornamental ponds• Fire-fighting
• For community purposes, it is to be treated with lesser quality standards• Irrigation• Watering grounds• Construction• Flushing sewers• Recharging groundwater• Recycled water can also be used for a range of industrial processes and dust suppression.
• The quality of both recycled water and drinking water needs to be monitored at various locations right from source of treatment, at the reservoirs, along the pipelines and at customers homes to prevent the cross mixing of each other.• However, recycled water is not appropriate for personal use such as drinking, bathing, cooking or general cleaning inside the home.
RANGE OF RECYCLED WATER QUALITY STANDARDS Vs FRESH WATER STANDARDS Permissible Standards Recycled waterSL No: Quality Parameters Recycled water after softening Recycled water after Fresh Water after tertiary and demineralization treatment chlorination 1 PH 7 – 8.5 7.1 – 7.3 7.1 – 7.2 8.75 Total Hardness (mg/pl 2 35 – 40 120 - 170 40 Nil as Caco3) Chlorides 3 15 - 20 60 - 130 60 – 130 Nil (mg/l as Cl) Sulphates 4 1.5 – 2.5 15 - 25 15 – 25 Nil (mg/l as So4) Phospates 5 0.1 0.2 – 0.5 0.2 – 0.5 Nil (mg/l as Po4) Nitrates 6 1-2 13 - 19 13 – 19 Nil (mg/l as NO3) 7 Suspended solids (mg/l) 5 - 10 Nil Nil Nil 8 Turbidity 1 -5 2-3 2–3 0.2 9 BOD 5 (mg/l) 0.1 – 1.5 1-2 1 – 1.5 Nil 10 COD (mg/l) 1–2 4–6 3.5 - 5 Nil 11 Coli form Nil Nil Nil Nil