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Your resource for all things weather including, radar, and hourly forecasts.
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.
The MMSD Deep Tunnels have prevented more than 138 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.
CURRENT STORAGE 14 million gallons
MAX CAPACITY 432 million gallons
LENGTH 21.4 MILES
DIAMETER 17 FT. TO 32FT
DEPTH UNDERGROUND 300 FT.
As of 12/8/21, 12:40 AM
CURRENT STORAGE 0 million gallons
MAX CAPACITY 89 million gallons
LENGTH 7.1 MILES
DEPTH UNDERGROUND 135ft. TO 175 FT.
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.
CURRENTLY TREATING 44 million gallons / day
MAX CAPACITY 300 million gallons / day
CURRENTLY TREATING 116 million gallons / day
MAX CAPACITY 330 million gallons / day
Want to see how much rain we've had in the last two or three weeks?
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.
Receive Water Drop Alert text messages when heavy rain threatens the area. When a Water Drop Alert has been issued a reminder is sent to use less water until the rain passes.
What do you do when an alert is issued?
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.
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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