Mumbai Monsoon: Mumbai Lake Levels, Flood Risk High Tide Dates

Listed below are the latest water levels in Mumbai’s lakes. Also listed is the Actual Vs Normal rainfall in 2019 in Mumbai.

On 20 July, 2019 the 10% water cut has been withdrawn. Tulsi Lake was the first Mumbai Lake to overflow on 12 July, 2019 (9 July in 2018), followed by Tansa on 25 July, 2019, Modak Sagar on 26 july, 2019 and Vihar Lake on 31 July, 2019. Mumbai Lake water levels on 5 August, 2019 stood at 13.25 Lakh million litres.

With 1470.4 mm of rainfall, Mumbai Santacruz has recorded the wettest July since 1907. 2019 Mumbai Monsoon season started on 25 June, 2019, which was over 2 weeks late. By 20 August, 2019, Mumbai Santacruz (Suburbs) had received 45% excess rain and Mumbai Colaba had 15% above average rainfall as on that date. For further details please see Latest Mumbai Rainfall Level.

 

 
 

Latest Water Levels In Mumbai’s Lakes

Listed below are the latest 2019 water levels in the lakes that supply water to Mumbai city.

MUMBAI LAKE MUMBAI LAKE LEVELS ON 20 AUGUST, 2019 (Mcum) CAPACITY OF MUMBAI LAKES (Mcum) % OF LAKE’S TOTAL CAPACITY % OF 8 YEAR AVERAGE ON SAME DAY MUMBAI LAKE OVERFLOW LEVEL (Meters) LAKE’S SHARE OF WATER TO MUMBAI (%)
Bhatsa Lake 900 942 96% 83% 142.07 48%
Upper Vaitarna 308 331 93% 82% 603.51 16%
Middle Vaitarna 186 194 96% 97% 285.00 12%
Modak Sagar 175 175 100% 98% 163.15 11%
Tansa Lake 172 173 100% 90% 128.63 10%
Vihar Lake 27 28 96% 79% 80.42 2%
Tulsi Lake 7 8 88% 92% 139.17 1%

[Mcum = Million Cubic Metre][NOTE: Some figures have not been updated]

 

Vihar Lake overflowed on 31 July, 2019. Modak Sagar Lake overflowed on 26 July, 2019. Tansa lake overflowed for the first time in 2019 on 25 July, 2019.

Mumbai’s smallest lake, Tulsi Lake, was the first to overflow on 12 July, 2019. In 2018 Tulsi overflowed on 9 July, 2018.

On 5 August, 2019 water in Mumbai Lakes was 13,25,904 million litres, which is 91.61% of the usable water capacity of Mumbai lakes.

As on 3 August, 2019 water in Mumbai Lakes was 13.24 lakh million litres (91.53% of usable Mumbai Lake water). On 31 July, 2019 water in Mumbai Lakes was 12.40 lakh million litres (86.44% of usable water). On 29 july, 2019 Mumbai’s Lakes had 11.30 Lakh million Litres (78.08% of usaable lake capacity). On 28 July, 2019 Mumbai Lake Levels was 10.89 lakh million litres (75.25% of usable water capacity). On 27 July, 2019 Mumbai’s lakes had 10.07 lakh million litres of usable water (on 27 July, 2018 it was 12.03 lakh million litres). On 25 July, 2019, Mumbai Lakes had 8.37 Lakh million litres (58% of capacity) of usable water. Last year on 25 July, 2018 water in Mumbai’s lakes was 11.91 lakh million litres (82.54% of capacity). On 24 July, 2019 it was 7.87 lakh million litres (54%). On 19 July, 2019, Mumbai Lake Level was 7,43,531 million litres (51.4%). On 15 July, 2019, Mumbai Lake level was 6.98 Lakh Million Litres (48%) of water. On 11 July 2019 Mumbai’s Lakes had 5.47 Lakh Million Litres of water, which is 37.8% of Mumbai’s water requirement. On 29 June, 2019 the usable water in Mumbai’s Lakes was only 5.31% (77,404 Million Litres).

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.

 
 

On 31st May, 2018 usable water in Mumbai’s lakes was only 1.47 million litres. This is only 10.16% of available water. This level was 2.88 million litre (19.92%) in 2018 and 2.97 million litre (20.56%) in 2017.

On 15 November, 2018, BMC imposed a 10% cut in water supply. As on 18 February, 2019, Mumbai Lakes levels stood at 42% (same time last year it was 56%).

NOTE: During the first 15 days of Monsoon, rain water percolates into the soil increasing the ground water level. So even when there is heavy rains during the start of the Mumbai Monsoon season, the water level in Mumbai Lakes may not show a sharp rise. Once the ground water level has increased, that is when water from hills flow into Mumbai’s Lakes. Which is why after the first two to three weeks of Monsoon the Mumbai Lake levels start rising sharply.

 

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.
    • After Tokyo, Mumbai has the second largest Water Supply System in Asia. Mumbai’s water distribution network is 6000 Km long. 2 Master Balancing Reservoir and 27 Service Reservoirs are involved in the distribution of water in Mumbai.
    • 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, located in Thane district), Upper Vaitarna (built in 1973, located in Nashik district), Middle Vaitarna (built in 2012, located in Thane district), Tansa Lake (built in 1925, located in Thane district), ModakSagar Lake (built in 1957, located in Thane district), Tulsi Lake (built in 1879, located in Borivali National Park, Mumbai) and Vihar Lake (built in 1860, located in Borivali National Park, Mumbai).
    • 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 and Bhiwandi.
    • 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.
    • Upper Vaitarna is in Nashik district and at a height of 633 Meters. Middle Vaitarna Dam is in Thane District at a height of 322 Meters. Modak Sagar Lake is also in Thane District and at a height of 186 Meters. Water from Upper Vaitarna flows to Middle Vaitarna and from there to Modak Sagar. Water from Modak Sagar flows via pipes to the Bhandup water purification plant in Mumbai. Due to the difference in height, water flows from Upper Vaitarna to Middle Vaitarna to Modak Sagar because of gravity. Since Vaitarna River flows from Upper Vaitarna Lake to Modak Sagar, this is why Modaksagar is sometimes refered to as “Lower Vaitarna”.
    • 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. This water will be brought using 2 dams (Bhugad in Nasik and Khargihill in Thane district) and 3 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. Water from Gargai River (a tributory of Vaitarna River) will be sent to Modak Sagar and from there the existing infrastructure will be used to send water to Mumbai.
    • 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 20 AUGUST, 2019
ACTUAL RAIN (mm) NORMAL RAIN (mm) DIFFERENCE (ACTUAL Vs NORMAL) (%)
Mumbai – Colaba 1817.4 1578.7 +238.7 (+15 %)
Mumbai – Santacruz 2501.7 1721.3 +780.4 (+45 %)

 

  • In July 2019, Mumbai Santacruz received 1470.4 mm of rain. This has been the wettest July in Mumbai since 1907. In 1907 Mumbai Santacruz received 1500 mm of rain in the month of July.
  • It has been a very late start to the 2019 Monsoon season in Mumbai. Usually the Monsoon arrives in Mumbai by 10 June. Although 25 July 2019 was the official start of the Mumbai Monsoon, heavy rains started only from 28 June, 2019. Pre-Monsoon showers in Mumbai started from 9 June, 2019.
  • Mumbai received heavy rains in the last three days of June, 2019. For the month of June 2019, Mumbai City continued to have 37% deficient rain, but Mumbai Suburbs (Santacruz) received 2% surplus rain.
  • Mumbai Suburbs (Santacruz) on an average gets 2230 mm of rain during the Monsoon Season. For 10 days, from 28 June to 7 July 2019, Mumbai Suburbs received heavy rains. The half way mark (1163.1 mm) for Mumbai Rains was crossed in 10 days. By 7 July 2019, Mumbai suburbs had 54% excess rain. Ironically Mumbai City (Colaba) was still running a slight deficit (-9%).
  • 2018 Monsoon Season in Mumbai started well; but rainfall in August and September was disappointing. September 2018 experienced the lowest rainfall in Mumbai in 27 years. As on 30 September, 2018 South Mumbai had 13% deficient rain (10% surplus in 2017).
    At the end of the Mumbai Monsoon Season (30 Sept, 2018), water level in Mumbai’s lakes was around 91% (it was 99% in 2017).
  • 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 2019 Mumbai Monsoon (High Tide > 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.

Mumbai has 6 Pumping Stations. These Pumping Stations have pumps and big gates. During high tide in the rainy season, gates are closed so that sea water cannot enter Mumbai’s drains. During high tide, drain water is collected within the pumping station. Once high tide subsides, the pumping station gates are opened and the collected water is released in the sea.

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 2019 Monsoon season.

 

JUNE 2019: Flood Risk Dates During Mumbai Monsoon

DATE WHEN HIGH TIDE > 4.5 Mt HIGH TIDE LEVEL (Meters) TIME WHEN HIGH TIDE > 4.5 Mt
3 June, 2019 4.58 12:11 pm
4 June, 2019 4.72 12:49 pm
5 June, 2019 4.78 1:30 pm
6 June, 2019 4.74 2:12 pm
7 June, 2019 4.63 2:58 pm
8 June, 2019 4.46 3:47 pm
16 June, 2019 4.47 11:39 am
17 June, 2019 4.56 12:18 pm
18 June, 2019 4.57 12:55 pm
19 June, 2019 4.53 1:31 pm

 
 

JULY 2019: Flood Risk Dates in Mumbai Rainy Season

DATE WHEN HIGH TIDE > 4.5 Mt HIGH TIDE LEVEL (Meters) TIME WHEN HIGH TIDE > 4.5 Mt
2 July, 2019 4.59 11:53 am
3 July, 2019 4.78 12:35 pm
4 July, 2019 4.87 1:17 pm
5 July, 2019 4.87 2:00 pm
6 July, 2019 4.78 2:44 pm
7 July, 2019 4.60 3:30 pm
31 July, 2019 4.57 11:35 am

 
 

AUGUST 2019: Risky High Tide Dates In 2019 Mumbai Rains

DATE WHEN HIGH TIDE > 4.5 Mt HIGH TIDE LEVEL (Meters) TIME WHEN HIGH TIDE > 4.5 Mt
1 August, 2019 4.79 12:18 pm
2 August, 2019 4.95 12:59 pm
3 August, 2019 4.93 1:41 pm
4 August, 2019 4.83 2:23 pm
5 August, 2019 4.62 3:05 pm
29 August, 2019 4.53 11:13 am
30 August, 2019 4.76 11:56 am
31 August, 2019 4.88 12:36 pm

 
 

SEPTEMBER 2019: High Tide Dates in 2019 Mumbai Monsoon

DATE WHEN HIGH TIDE > 4.5 Mt HIGH TIDE LEVEL (Meters) TIME WHEN HIGH TIDE > 4.5 Mt
1 September, 2019 4.67 11:39 am
2 September, 2019 4.75 1:56 pm
3 September, 2019 4.51 2:36 pm
28 September, 2019 4.64 11:29 am
29 September, 2019 4.73 12:09 pm
30 September, 2019 4.70 12:48 pm
1 October, 2019 4.55 1:27 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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