MMSD Storm Update August 1st, 2026

08/06/26 09:00:am

MMSD is reporting the following information (see 5-day letter) to the Wisconsin Department of Natural Resources regarding a combined sewer over that took place on August 1, 2026.

Overflow Volume:

8/1/26 - Overflow volume of 96 million gallons.

One inch of rain in MMSD's service area equals 7.1 billion gallons of water.

To view a map of the impacted waters from the sewer overflow in the Greater Milwaukee area.

Rainfall exceeded three inches at numerous gauges from the afternoon of July 31 through August 1^st.

View Water Reclamation Facilities
Current Capacity

Additional Resources

Heavy rains resulting in dangerous Milwaukee area Rivers

Heavy Rains = Dangerous Rivers

Please be safe around our concrete-lined rivers. STAY OUT of the concrete-lined channel since the water is fast-moving and the concrete is slippery. Call 911 if someone is in danger. We need your help in keeping our community safe.

Text: WATERDROP to 414-296-4422 for Española texto GOTADEAGUA a 414-296-4422

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.

What do you do when an alert is issued?

Hold off on washing dishes and laundry
Take a shorter shower
Empty your rain barrel

IMPORTANT! Water in the Basement can be dangerous

Do not go into a basement with standing water. Electricity + Water = Danger.
Call your municipal public works department to report the problem. If your municipality is unable to help you, call MMSD at (414) 272-5100 or report a wet basement.
Call your homeowners/renters insurance agent.
Wait for the water to drain out of the basement before entering. Or, call a qualified electrician to disconnect the power before you enter a flooded basement.