Okay, so here's a thought for all my fellow Mumbaikars out there, especially as we hit mid-monsoon. I was just looking at the latest report from the Hydraulic Engineer's Department, specifically from the Bhandup Master Control Centre, and it gives us a pretty detailed picture of where our city's water supply stands. It’s August 7 at 6 AM, and the numbers are in for the seven lakes that essentially keep Mumbai going.
Collectively, these lakes are holding a massive 12,80,931 million litres of water right now. And honestly, that sounds like a lot, doesn't it? When you put it into perspective, it translates to 88.50% of their total live storage capacity. That's a solid percentage, and it certainly helps you breathe a little easier knowing we're not struggling.
But here's where things get a little interesting, and maybe a tiny bit concerning, depending on how you look at it. This year's water storage, while good, is actually a touch lower than what we saw last year. Last year the lakes had 12,90,817 million litres, which was 89.18% of capacity. And if we go back another year to 2024, the numbers were even higher at 13,05,948 million litres, hitting 90.23%. So, while we’re still in a good spot, it does make you wonder about the slight downward trend over the past couple of years.
However, there's definitely some great news mixed in with those comparisons. Three of our crucial reservoirs – Modak Sagar, Vihar, and Tulsi – are completely, absolutely full! They’re maintaining a live storage of 100%, and that's genuinely something to celebrate. It means those areas have received consistent, heavy rainfall, and the system is working well to capture it.
And then you have Tansa Lake, which is doing incredibly well too, standing at a robust 98.69%. You can practically feel the rain impacting that region just by looking at that percentage. It’s practically overflowing, which is always a good sign for the city's water security.
Looking at the other big players, the Middle Vaitarna reservoir is currently filled to 90.39%, which is also pretty impressive. And Bhatsa, which many of us know as the largest reservoir in the entire city, is holding strong at 86.21%. These are all very healthy numbers that speak to the power of our monsoon.
But, as with any system, there's always one that’s a little behind the curve. In this case, it’s the Upper Vaitarna lake, which is the least filled among the lot, at 79.26%. It’s still a decent percentage, mind you, but it highlights the varied rainfall patterns we often see across different parts of the region.
Here are a few key takeaways from the latest data:
- Mumbai's collective lake storage is at 88.50%, slightly lower than the past two years.
- Three major reservoirs – Modak Sagar, Vihar, and Tulsi – are currently 100% full.
- Upper Vaitarna is the least filled lake, holding 79.26% of its capacity.
When we talk about the rainfall itself, the past 24 hours before the report saw Upper Vaitarna getting the most precipitation, with 31 mm. That's good news for that particular lake, hopefully helping it catch up a bit. Other reservoirs like Middle Vaitarna got 11 mm, Modak Sagar saw 12 mm, and Tulsi recorded 6 mm. It really shows how localized these rain showers can be.
The Bhandup Complex, which is a significant part of the system, has recorded a pretty impressive seasonal rainfall total of 2,424 mm. That kind of consistent downpour is absolutely crucial for the long-term replenishment of our lakes, and it's a number that always makes you feel a bit more secure about the coming months.
This monsoon season, generally speaking, has delivered varied rainfall across the lakes. Upper Vaitarna, despite being the least full right now, has actually received a total of 3,144 mm for the season. Modak Sagar has had 2,656 mm, and Tansa a solid 2,466 mm. These seasonal totals are what really count in the long run.
And honestly, the best news for any Mumbaikar is always hearing about the lakes overflowing! Vihar Lake has been overflowing since July 7, and Tulsi Lake followed suit on the very same day. Tansa Dam started overflowing on July 22, and Modak Sagar Dam joined the party on July 23. That's a wonderful cascade of good news, meaning these dams are absolutely bursting with water.
The Hydraulic Engineer's Department has also shared some operational details, indicating that the Middle Vaitarna WSCPO gate remains closed, which makes sense if they're trying to conserve water. And the water release from Upper Vaitarna has actually been suspended since July 6. It seems like a strategic move to ensure we hold onto every drop possible, especially for the lake that isn't quite at full capacity yet. It really just goes to show how much planning and constant monitoring goes into managing our city’s water supply… and how much we rely on those monsoon rains every single year.
