Clean River Alliance

Water Quality & Public Health

The Long Journey of a Nitrogen Molecule: Tracing Farm Runoff from Midwest Fields to Gulf Coast Dead Zones

Every spring, snowmelt and rainfall carry millions of tons of agricultural nitrogen and phosphorus off Midwest croplands and into America's river networks, beginning a months-long journey that ends in oxygen-depleted coastal waters where marine life cannot survive. The Gulf of Mexico's hypoxic dead zone — sometimes larger than the state of New Jersey — is the most visible consequence of a nutrient pollution crisis that implicates farm policy, infrastructure investment, and the choices made on in

Jul 21, 2026

River Science & Ecology

When Salmon Return, Forests Listen: What One Migratory Fish Teaches Us About River Restoration

Salmon are far more than a commercially prized fish — they are living architects of entire ecosystems. From the old-growth forests of the Pacific Northwest to the reviving river corridors of the Great Lakes, tracking salmon populations offers scientists and conservationists one of the most reliable measures of watershed health available. Their story is ultimately a story about what rivers can become when we choose restoration over extraction.

Jul 21, 2026

Water Quality & Public Health

Invisible Threat: The Microplastic Contamination Silently Moving Through Every American Watershed

Microplastics have been detected in rivers from the Mississippi to the Colorado, in the drinking water of major cities, and even in the blood and lung tissue of human beings. Despite mounting scientific alarm, these synthetic particles remain almost entirely unregulated in the United States. Understanding where they come from—and what they do once they enter a watershed—is the first step toward demanding the policy response this crisis requires.

Jul 21, 2026

River Science & Ecology

Breaking the Concrete: How Strategic Dam Removal Is Rewriting the Future of American Rivers

Across the United States, engineers, ecologists, and policymakers are dismantling aging dams and watching rivers heal themselves with remarkable speed. Beyond restoring fish populations and natural sediment flow, dam removal is emerging as a powerful and underutilized tool in the broader fight against climate change. The science is compelling—and the momentum is growing.

Jul 21, 2026

Water Quality & Public Health

From Source to Faucet: 7 Emerging Contaminants Threatening Your Municipal Water Supply

Most Americans turn on their taps without a second thought, trusting that what flows out has been rendered safe by modern treatment technology. That trust is not entirely misplaced—but it is increasingly incomplete. A growing class of contaminants is reaching household faucets largely undetected, and the regulatory frameworks designed to catch them have not kept pace.

Jul 21, 2026

River Science & Ecology

Oxygen Starved: How America's Rivers Are Choking—and the Science-Backed Path to Recovery

Across the United States, stretches of once-thriving rivers are quietly becoming watery deserts—zones so depleted of dissolved oxygen that fish, invertebrates, and entire ecological communities cannot survive. The forces driving this crisis are well understood, and so are the solutions. What remains lacking is the political will and public urgency to act.

Jul 21, 2026