Sep 202017
 

Listed below are the latest water levels in Mumbai’s lakes. Also listed is the Actual Vs Normal rainfall in 2017 in Mumbai.
GOOD NEWS: At the end of the 2017 Monsoon Season, water in Mumbai Lakes was around 99%. Water-wise Mumbai is in a comfortable position for 2017 and 2018. South Mumbai received 10% surplus rain and Mumbai suburbs received 32% surplus rain in 2017.

 

 
 

Latest Water Levels In Mumbai’s Lakes

Listed below are the latest 2017 water levels in the lakes that supply water to Mumbai city.

MUMBAI LAKE MUMBAI LAKE LEVELS ON 30 SEPTEMBER, 2017 (Mcum) CAPACITY OF MUMBAI LAKES (Mcum) % OF LAKE’S TOTAL CAPACITY % OF 6 YEAR AVERAGE ON SAME DAY MUMBAI LAKE OVERFLOW LEVEL (Meters) LAKE’S SHARE OF WATER TO MUMBAI (%)
Bhatsa Lake 936 942 99% 97% 142.07 48%
Upper Vaitarna 331 331 100% 94% 603.51 16%
Middle Vaitarna 193 194 100% 98% 285.00 12%
Modak Sagar 169 175 97% 97% 163.15 11%
Tansa Lake 171 173 99% 97% 128.63 10%
Vihar Lake 28 28 100% 98% 80.42 2%
Tulsi Lake 8 8 100% 100% 139.17 1%

[Mcum = Million Cubic Metre]

 
20 September, 2018 was declared a Mumbai school and college holiday because of heavy rains. On 29 August, 2017, Mumbai city received 102mm and Mumbai’s suburbs received 316mm of rain in 12 hours. This led to flooding, which in turn disrupted normal life.
Modak Sagar was the first Mumbai lake to overflow in 2017. Modak Sagar Lake overflowed on 15 July, 2017. Compare this to recent years when Modak Sagar used be at less than 60% of its capacity at the same time. Tansa Lake overflowed on 18 July, 2017.
As on 18 July, 2017, lakes supplying water to Mumbai had filled to 71% (10.28 million litres) of their live useful capacity. At the same time in the last few years, Mumbai’s lakes had filled to around 50% of their capacity. The target till the end of Monsoon is 14.47 million liters.
September 30 is considered the end of the Monsoon season in Mumbai. As on 30 September, 2016, Mumbai’s lakes have around 14.4 Lac Million Liters. Given this comfortable situation, local authorities of the BMC do not need to impose water cuts.
As on 21 September, 2016, Mumbai’s lakes had 14.4 lakh million litres of water, which is approximately 12 months of lake water stock. By comparison water in Mumbai’s lakes in 2015 was 10.8, 2014 was 14.3, 2013 was 13.4, 2012 was 12.6, 2011 was 12.4, 2010 was 12.2 and 2009 was 9.3 lakh million liters.
The total storage capacity of Mumbai’s lakes is 14.80 lakh million litres. In order to avoid water supply cuts, Mumbai’s lakes must fill up to 14.47 lakh million liters (MLD) on 30 September, which is the end of the monsoon season in Mumbai.
Tulsi Lake was the first Mumbai Lake to overflow on 19 July, 2016. Modak Sagar and Vihar Lake overflowed on 1 August, 2016. Tansa Lake overflowed on 2 August, 2016. Middle Vaitarna overflowed on 3 August, 2016.

At the end of the 2015 Mumbai Monsoon season on September 30, 2015, the 2 lakes that provide Mumbai with 64% of its Lake water were far from full capacity. Bhatsa, which provides 48% of Mumbai’s water, had filled up to only 81% of its capacity and Upper Vaitarna, which provides 16% of Mumbai’s lake water, had filled up to only 71% of its capacity.
Given the low reserves in the catchment area of Mumbai’s Lakes, the local government (BMC) had introduced 20% water cut to residential users and 50% water cut to commercial users in Mumbai City. On 20 July, 2016 this water cut was revoked.
If it weren’t for Middle Vaitarna, Mumbai would be facing a severe water problem in 2015 and 2016.
On 22 September, 2015, water in Mumbai’s lakes was only 11.30 Lakh million litres, which is 240 days of water supply.

 
 

Monsoon is a magical time for the Sahyadri Western Ghats near Mumbai. The mountains, hill stations, lakes and waterfalls around Mumbai have a special charm during the rains. Listed below are some of the best hill stations and waterfalls near Mumbai:

 


 

Mumbai’s Daily Water Requirements And Water From Mumbai’s Lakes

High tide dates that may cause floods during Mumbai Monsoon

    • Mumbai City’s daily water requirement is 4,200 million liters. Mumbai’s Municipality (BMC) supplies only 3,500 to 3,750 million liters of water per day. The gap between demand and supply is met by tankers, wells, bore wells, rain water harvesting, etc.
    • Formula used by BMC to determine daily water requirement in Mumbai is 135 litres per person in housing societies, 45 litres per person in slums (almost 50% of Mumbai),135 litres per hotel bed and 70 litres per restaurant table.
    • With a capacity to filter 2,100 million liters of water per day, the Bhandup water treatment plant is the largest such treatment plant in Asia. 4 water treatment plants supply water to Mumbai.
    • According to the Chief Minister of Maharashtra, 900 million litres of water is wasted everyday in Mumbai. This wastage occurs because of leakages in pipes and theft of water. After this loss of water, BMC is able to supply around 975 million litres of water to the main city (population of 3.1 million), 930 million liters to Mumbai’s Eastern suburbs (population of 3 million) and only 620 million liters to the Western suburbs from Goregaon to Dahisar (population of 3 million).
    • Mumbai’a Water distribution network is 6,000 Km long. This amazing water network is designed in such as way that almost all the water distribution is done via gravity.
    • 7 lakes that supply water to Mumbai are Bhatsa Lake (built in 1983), Upper Vaitarna (built in 1973), Middle Vaitarna (built in 2012), Tansa Lake (built in 1925), ModakSagar Lake (built in 1957), Tulsi Lake (built in 1879) and Vihar Lake (built in 1860).
    • The total annual water capacity of Mumbai’s 7 lakes is 14,47,000 million liters. Of these 7 lakes, only Tulsi Lake and Vihar Lake are within Mumbai city.
    • Bhatsa Lake provides water to the Eastern part of Mumbai, whereas the other lakes provide water to the main city of Mumbai and the suburbs. Bhatsa also supplies water to Thane.
    • The two biggest water sources for Mumbai – Bhatsa Lake and Upper Vaitarna – are managed by the Maharashtra state government. The balance 5 Mumbai Lakes are managed by the MCGM.
    • Damanganga – Wagh – Pinjal water linking project and the Gargai project are the major new projects to increase water supply to Mumbai. For the Damanganga–Wagh-Pinjal Project, water from Damanganga River (in Gujarat), Wagh River and Pinjal River (both in Maharashtra) will be diverted to Mumbai using 3 dams and 2 tunnels. This will augment Mumbai’s water supply by a massive 1,600 million liters per day. An additional 865 million liters per day will be supplied once the Pinjal Dam is complete. The Gargai Dam project will increase Mumbai’s daily water supply by 227 million liters.
    • Navi Mumbai gets water from Dehrang Dam in Panvel and Pune gets water from Panshet Dam and Khadakwasla Dam.

In case of water related issues in Mumbai, the BMC helpline numbers are South Mumbai (23695835, 23678109), Western Suburbs (26146852, 26184173) and Eastern Suburbs (25153258).

 
 

 
 


 

Lakes That Supply Water To Thane, Navi Mumbai, Raigad

Listed below are the Lakes and Dams that supply water to Navi Mumbai and the main towns in Thane and Raigad districts of Maharashtra. These areas are around Mumbai and are part of the Mumbai Metropolitan Region.

  • Navi Mumbai Municipal Corporation (NMMC), which consists of CBD Belapur, Nerul, Vashi, Sanpada and Turbhe, Koperkharine, Ghansoli, Airoli, Digha gets water from Morbe Dam. This water is purified at the Bhokarpada Water treatment Plant. In addition MIDC and CIDCO’s Hetawane also provide water to Navi Mumbai Municipal Corporation. Daily demand for water in NMMC areas is 425 Million Litres per Day (MLD)
  • CIDCO is the planning and development authority of Navi Mumbai. CIDCO has classified Navi Mumbai into 14 Nodes. 7 of CIDCO’s nodes are managed by NMMC. The balance 7 CIDCO nodes/townships get water from Hetawane Dam (run by CIDCO), Morbe Dam (run by NMMC), Barvi Dam (run by MIDC) and Patalganga (run by MJP). These 7 nodes are Kharghar (gets water from Hetwane Dam, Morbe Dam and Barvi Dam), Kalamboli (gets water from Barvi and Patalganga), Ulwe (gets water from Hetawane), Dronagiri (gets water from Hetawane), Kamothe (gets water from Marbe) and Panvel (gets water from Patalganga). To meet its long term water needs, CIDCO has started work on the Balganga Dam which is expected to provide 350 MLD of drinking water. CIDCO is also expected to get 300 MLD of water from Kondhane Dam. Daily water demand in this area is 215 MLD.
  • Panvel Municipal Corporation gets water from Dehrang Dam and Patalganga Water Supply Scheme which is run by Maharashtra Jeevan Pradhikaran (MJP).Daily water requirement in Panvel Municipal Corporation’s area is 27 MLD.
  • Uran, JPT and ONGC areas in Raigad district get water from Ramsai Dam. Water requirement in this area is 35 MLD.
  • Taloja MIDC gets water from Maharashtra Industrial Development Corporation (MIDC), which gets water from Barvi Dam. Daily water demand from Taloja MIDC is 35 MLD.
  • Trans Thane Creek (TTC) Industrial area near Rabale gets water from MIDC’s Barvi Dam. Daily water requirement of this industrial area is 50 MLD.
  • Thane Belapur Road area gets water from MIDC’s Barvi Dam. Daily water requirement in the Thane-Belapur area is 75 MLD.
  • Thane City gets water from Bhatsa Lake and Barvi Dam (MIDC).Thane, the city of lake, daily requires 480 MLD.
  • Kalyan and Dombivali get water from MIDC’s Barvi Dam. Kalyan and Dombivli’s water requirement is 402 MLD.
  • Ulhasnagar gets water from MIDC’s Barvi Dam. Water demand for Ulhasnagar is 165 MLD.
  • Ambernath gets water from Barrage Dam, Chikloli Dam and MIDC’s Barvi Dam. Ambernath needs 47 MLD of water.
  • Badlapur and Kulgaon get water from Barrage Dam and MIDC’s Barvi Dam. Badlapur and Kulgaon require 40 MLD of water daily.

 
 


 

Latest Mumbai Rainfall Level: Actual Vs Normal Rain in Mumbai

Table contains the latest 2017 rainfall level in Mumbai. Table has the Actual Rainfall Vs Average (Normal) Rainfall in Mumbai.

MUMBAI LOCATION TOTAL RAINFALL IN MUMBAI UNTIL 30 SEPTEMBER, 2017
ACTUAL RAIN (mm) NORMAL RAIN (mm) DIFFERENCE (ACTUAL Vs NORMAL) (%)
Mumbai – Colaba 2253.4 2053.1 +200.3 (+10 %)
Mumbai – Santacruz 2946.3 2231.6 +714.7 (+32 %)

 

  • At the end of the 2017 Mumbai Monsoon Season on 30 September, 2017, South Mumbai (Colaba) has received 10% more rain and Mumbai Suburbs (Santacruz) has received 32% more rain. This is the second year in a row that Mumbai has received above average rainfall.
  • 30 September is considered the end of the Monsoon Season in Mumbai. As on 30 September, 2016, South Mumbai (Colaba) has received 22% more rain than normal and Central Mumbai (Santacruz) had received 30% more rain than normal. This is in sharp contrast to 2015.
  • Mumbai received less than normal rainfall in 2015. Until 30 September, 2015, Mumbai (Colaba) had deficient rainfall to the extent of 22% and Mumbai (Santacruz) was deficient by 18%.
  • 2015 June month has seen the maximum rainfall in Mumbai of any June month, ever since BMC has been keeping records of Mumbai’s rainfall. BMC has rainfall records from 1951. July 2015 has been the driest Mumbai monsoon month in the last 10 years.
  • June 2014 was the driest June month in Mumbai since 1951. July 2014 on the other hand was the wettest July month in Mumbai since 1951.
  • Every year Colaba (South Mumbai) gets an annual average of 2160 millimeters of rain and Santacruz (Central Mumbai) gets an annual average of 2350 millimeters of rain.
  • Mumbai gets 70% of its annual rain in the months of July and August.

 
 


 

Flood Risk Dates In 2017 Mumbai Monsoon Where High Tide Over 4.5M

In Mumbai rain water flows into the Arabian Sea through the drain system. When high tide in the sea is over 4.5 meters, there is danger of sea water entering Mumbai via the drain pipes. In such situations Mumbai’s Municipal Corporation (BMC) closes the storm drains. When this happens, there is no exit for Mumbai’s rain water. When rainfall is heavy and high tide is over 4.5 meters, there is a high probability of flooding in Mumbai.

Places that are at a low level are at a greater risk of flooding. This a link to Mumbai’s Low Lying Areas that are at risk of Flooding in the Rains.

Listed below are the flood risk dates and time when Mumbai is at risk of flooding during the 2017 Monsoon season.

 

JUNE 2017: Flood Risk High Tide Dates During Mumbai Monsoon

DATE WHEN HIGH TIDE > 4.5 Mt HIGH TIDE LEVEL (Meters) TIME WHEN HIGH TIDE > 4.5 Mt
23 June, 2017 4.76 11:28 AM
24 June, 2017 4.95 12:15 PM
25 June, 2017 5.02 1:01 PM
26 June, 2017 4.97 1:45 PM
27 June, 2017 4.82 2:30 PM
28 June, 2017 4.60 3:15 PM

 
 

JULY 2017: Flood Risk High Tide Dates in Mumbai Rainy Season

DATE WHEN HIGH TIDE > 4.5 Mt HIGH TIDE LEVEL (Meters) TIME WHEN HIGH TIDE > 4.5 Mt
22 July, 2017 4.61 m 11:16 AM
23 July, 2017 4.80 m 12:02 PM
24 July, 2017 4.89 m 12:45 PM
25 July, 2017 4.88 m 1:27 PM
26 July, 2017 4.76 m 2:07 PM
27 July, 2017 4.55 m 2:47 PM

 
 

AUGUST 2017: Risky High Tide Dates During 2016 Mumbai Rains

DATE WHEN HIGH TIDE > 4.5 Mt HIGH TIDE LEVEL (Meters) TIME WHEN HIGH TIDE > 4.5 Mt
9 August, 2017 4.49 m 1:07 PM
10 August, 2017 4.51 m 1:38 PM
21 August, 2017 4.63 m 11:46 AM
22 August, 2017 4.72 m 12:26 PM
23 August, 2017 4.70 m 1:03 PM
24 August, 2017 4.60 m 1:39 PM

 
 

SEPTEMBER 2017: Dangerous High Tide Dates in 2016 Mumbai Rains

DATE WHEN HIGH TIDE > 4.5 Mt HIGH TIDE LEVEL (Meters) TIME WHEN HIGH TIDE > 4.5 Mt
7 September, 2017 4.48 m 12:37 PM
8 September, 2017 4.50 m 1:09 PM
20 September, 2017 4.49 m 12:01 PM

 

 


 

BMC Monsoon Emergency Number and Disaster Management

During the monsoon season, the Brihanmumbai Municipal Corporation (BMC) Disaster Management department gets around 4,000 calls daily. BMC’s Disaster Management department takes care of monsoon related emergencies such as water clogging, flooding, tree crash, landslide, road cave-ins, etc.
BMC central Disaster Control Room Number is 1916 or 22694725.
Listed below are the Mumbai BMC ward-wise emergency disaster control room numbers. Mumbai residents should call these phone numbers for rain related emergencies.

  • Colaba, Cuffe Parade, Churchgate, Fort – 22624000
  • Dongri, Pydhonie – 23794000
  • Mumbadevi, Kalbadevi, Marine Drive – 22014000
  • Malabar Hill, Walkeshwar, Kemps Corner – 2386400
  • Mahalaxmi, Haji Ali, Worli – 24224000
  • Byculla, Agripada, Nagpada – 23014000
  • Parel, Shivadi (Sewri) – 24104000
  • Dadar, Shivaji Park, Mahim – 24397888
  • Wadala, Matunga, Sion – 24084000
  • Bandra, Khar, Santacruz – 26444000
  • Jogeshwari, Andheri (East) – 26847000
  • Andheri (West), Juhu – 26234000
  • Goregaon – 28727000
  • Malad, Malwani – 28826000
  • Kandivli, Charkop – 28054888
  • Borivli, Gorai – 28931188
  • Dahisar – 28936000
  • Kalina, Vakola – 26114000
  • Kurla, Saki Naka – 26505109
  • Deonar, Mankurd – 25558789
  • Chembur – 25225000
  • Ghatkopar – 25013000
  • Vikroli, Bhandup – 25154000
  • Mulund – 25694000

 
 


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