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MMSD Storm Update: April 2026

04/24/26 04:00:pm

The Milwaukee Metropolitan Sewerage District (MMSD) reported the following information to the Wisconsin Department of Natural Resources (WDNR) regarding overflows that occurred following record-breaking rainfall from April 14-18, 2026.

Greater Milwaukee Rainfall April 12 - April 18, 2026

rain gauge map for Greater Milwaukee April 12-18, 2026

Overflow Volumes (in millions of gallons)

MMSD Sewer Overflow Volume as of April 2026