After a week of April downpours turned streets and ditches into fast-moving streams, Brookfield officials opened emergency sewer overflows and sent more than 1.5 million gallons of sewage-laden water into the Fox and Menomonee rivers. City crews said they made the call to keep a bad situation from getting worse, trying to stop a mix of stormwater and sewage from bubbling up into basements as sanitary lines and storm drains hit their limit. Neighbors reported ditches and normally calm creeks running like rivers while public works teams hustled to move water away from homes and parks.
The city logged three separate sanitary sewer overflows between the evening of April 15 and the morning of April 16: 1,232,000 gallons at Bermuda Boulevard and Amber Court that reached the Fox River through a stormwater ditch, 114,240 gallons at Beverly Hills Drive and North Brookfield Road that drained into a storm pond, and 232,600 gallons from the Cardinal Crest emergency lift that flowed into the Menomonee River. In all, roughly 1.58 million gallons were released, according to a City of Brookfield press release. The notice said crews relied on emergency bypasses to protect homes and that the overflows were reported under state rules.
“It was the most I think I’ve seen water coming out of here at once,” resident Aaron Meilahn told reporters as he watched the surge, adding that he was relieved the city’s move kept his basement dry. Local coverage captured Meilahn’s reaction and highlighted officials’ description of the releases as a rare but necessary step. The initial TV report also noted that the Department of Public Works had received no complaints about any sewage odor as of Thursday afternoon, according to TMJ4 News.
Why the system overflowed
Sanitary sewer overflows can happen when systems that are supposed to carry wastewater get swamped by stormwater, when pumps lose power, or when clogs or line failures interrupt the flow, all issues the U.S. Environmental Protection Agency lists for SSOs. In a week like this one, heavy, repeated rain and already saturated ground push extra water into sanitary lines, and utilities sometimes open emergency bypasses to avoid sewage backing into basements, even though that means untreated flow ends up in creeks and rivers instead.
Health, rules and what residents should do
Untreated sewage can carry bacteria, viruses and parasites that may cause gastrointestinal, skin and other illnesses, according to the Centers for Disease Control and Prevention. The Wisconsin Department of Natural Resources requires utilities to report sanitary sewer overflows and notify the public under state rule NR 210.21, and the agency provides a template for those public notices. Residents are urged to avoid contact with affected waterways and to keep an eye out for river-use advisories or testing updates.
The city says it will monitor water quality and inspect key infrastructure as crews assess repairs, and it notes that Brookfield continues to invest in system upgrades to lessen the hit from heavy rain. Residents with questions can contact Matt Mortwedt, director of public works, at 262-796-6644, as listed in the city’s notice. Officials say follow-up sampling is expected and that any river advisories or future updates will be posted on the same city news page.
