Our Water

Stop unchecked data center development

Healthier Future for Wisconsin

Nitrates & Health: Drinking Water in Wisconsin

October 30, 2025

Nitrates are Wisconsin’s most widespread groundwater contaminant, threatening the drinking water of over two-thirds of Wisconsinites who rely on groundwater as their primary source of drinking water.…

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Harmful Algal Blooms & Potential Human Health Harms

October 30, 2025

The prevalence of algal blooms has been exacerbated by human activities like land use changes, historic and current over-application and runoff of nutrients in agriculture, the introduction of certain aquatic invasive species into Wisconsin, and climate change. …

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Question mark over a wetland

Clear As Mud: Hidden thirst of data centers

October 9, 2025

Large energy demands, and often corresponding water needs, pose a risk to Wisconsin’s water resources.…

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Filling up a glass with drinking water from kitchen tap

New report: Nitrate Contamination Driving Health Crisis and Rising Costs in Wisconsin

October 2, 2025

Wisconsin faces a growing public health crisis from nitrate contamination in drinking water.…

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defender podcast artwork featuring Amy and Michael

Data Center Secrets

September 21, 2025

What will the AI data center boom mean for Wisconsin’s precious water resources, our land, our energy bills? And why is it so hard to find out?…

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Nitrate Contamination Map, source: Clean Wisconsin

The Cost of Nitrate Contamination in Wisconsin’s Drinking Water

September 18, 2025

Wisconsin faces a growing public health crisis caused by widespread nitrate contamination in our drinking water.…

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data center

AI data centers in Wisconsin will use more energy than all homes in state combined

September 16, 2025

New analysis from Clean Wisconsin reveals scale of data center energy demand.…

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Line 5 Hearing Expert Testimony Begins

September 3, 2025

In front of a packed hearing room, expert testimony began today the legal battle against Enbridge’s Line 5 oil pipeline.…

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Legal Fight over Line 5 Oil Pipeline Moves to Madison

September 3, 2025

A multi-week legal hearing challenging Wisconsin’s approval for the Line 5 oil pipeline will move to Madison this week.…

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How much would you pay? Measuring the value of a clean environment

August 25, 2025

How much would you pay to swim in a clean lake? To fish in a pristine stream? You may not ever think about that, but meet somebody who does -- a lot…

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