Lake Michigan Lakeside

Milwaukee Weather Center

Helpful Weather Resources

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MILWAUKEE WEATHER

Looking for Information on Overflows?

During periods of intense rainfall, stormwater increases the amount of water sent to our wastewater treatment facilities. One inch of rain on MMSD’s service equals 7.1 billion gallons of water. Below is the current capacity of our water reclamation facilities and deep tunnel. When too much rain gets into the sanitary sewer system, preventing sewage from backing up into your basement is our highest priority, and may result in a sewer overflow (on average two times per year). If there is a sewer overflow, we will update the sewer overflow page to keep you informed.


MMSD DEEP TUNNELS

The MMSD Deep Tunnels have prevented more than 125 billion gallons of pollution from getting into Lake Michigan. Thanks to the deep tunnels and many other improvements, MMSD has captured and cleaned 98.4% of all the water and wastewater that's entered the regional sewer system since 1994.

DEEP TUNNEL

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CURRENT STORAGE
9 million gallons

MAX CAPACITY
432 million gallons

LENGTH
21.4 MILES

DIAMETER
17 FT. TO 32FT

DEPTH UNDERGROUND
300 FT.

As of 10/31/20, 2:05 AM

NORTHWEST SIDE DEEP TUNNEL

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CURRENT STORAGE
0 million gallons

MAX CAPACITY
89 million gallons

LENGTH
7.1 MILES

DIAMETER
20FT

DEPTH UNDERGROUND
135ft. TO 175 FT.

As of 10/31/20, 2:05 AM

WATER RECLAMATION FACILITIES

MMSD runs two water reclamation facilities, Jones Island and South Shore, that clean residential and industrial wastewater for 28 communities with approximately 1.1 million people in the Milwaukee area.

SOUTH SHORE WATER RECLAMATION FACILITY

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CURRENTLY TREATING
78 million gallons / day

MAX CAPACITY
300 million gallons / day

As of 10/31/20, 2:05 AM

JONES ISLAND WATER RECLAMATION FACILITY

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CURRENTLY TREATING
57 million gallons / day

MAX CAPACITY
330 million gallons / day

As of 10/31/20, 2:05 AM


MMSD RAIN GAUGE DATA

updated info(Data updated Oct 31, 2020, 2:05:00 AM )

CREATE A CUSTOM RAINFALL REPORT

Want to see how much rain we've had in the last two or three weeks?

  • Click on the date range box and the calendar will appear.
  • Click on a start date, then an end date. Select apply.
  • Look for your custom report on the map above.

 

Select a rainfall date range reset range

This page is automatically updated. The data have not been verified and may contain errors. As data are verified, MMSD reserves the right to make corrections to values as necessary. MMSD is providing this data as is and the user assumes the entire risk of use of this data.


Other Weather Resources

Water Drop Alert

To Sign-up Text: WATERDROP to 797979

Receive Water Drop Alert text message when large storms threaten the area. When a Water Drop Alert has been issued a reminder is sent to use less water until the storm passes. 

What do you do when an alert is issued?
It's simple. Try to use less water until the storm passes.

  • Hold off on washing dishes and laundry
  • Take a shorter shower 
a flooded basement

Reporting a Wet Basement

Please call your municipal public works department to report water in your basement, and fill out our Reporting a Wet Basement form. A copy of the form will be shared with your municipality. 

To learn more about what could be causing the water, visit our Water in My Basement page.

Keep My Basement Dry MMSD

Managing Water On Your Property

Managing water on your property can significantly reduce your chances of having a wet basement. Learn about your basement's laterals, foundation drains, and other issues that could be causing your basement to flood.

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