Future cities to harness power and resources from wastewater

Innovative technologies are transforming wastewater into drinking water, compost, and energy, revolutionizing urban resource management.

Matt Simon reports for Wired.


In short:

  • Companies like Epic Cleantec are developing systems to recycle gray water for non-potable uses and extract energy from wastewater.
  • Advanced purification techniques are enabling cities like San Diego to convert wastewater into drinking water.
  • Wastewater recycling is becoming essential for urban sustainability, especially in rapidly growing cities facing water stress due to climate change.

Key quote:

"We’re turning wastewater—which in my opinion, is a term that is in dire need of a rebrand—into clean water, into renewable energy, and into soil."

— Aaron Tartakovsky, cofounder and CEO of Epic Cleantec

Why this matters:

The shift toward recycling wastewater is a crucial step in addressing the increasing water demands of urban populations and the challenges posed by climate change. These innovative solutions not only conserve water but also create new resources, demonstrating a sustainable approach to city planning and environmental management.

Read: Expert ecologist William H. Schlesinger on what happens to all the modern, exotic compounds when we flush them into the environment.

Free flowing river flowing out of mountains in a semi-arid environment

Far from farms and cities, dry climates are boosting river nitrate pollution

A new study found nitrate hot spots in some unexpected places, including the Rocky Mountains and the Sahara Desert.
Massive data warehouse with rooftop solar panels.

Power shift: State election wins open path for climate progress

At a time of public outcry over data centers and rising electricity costs, incoming leaders will have a mandate to rein in polluters, constrain utilities, and advance clean energy.

A black bean burger being placed on a bun

Swapping plant-based burgers for beef could spell big climate wins without nutritional cost

Reducing ruminant meat, as opposed to all animal products, can help meet both environmental and public health goals, a new study finds.
A view of a group of offshore wind turbines

Governor Healey takes next step in bid to get in on Canadian offshore wind

President Trump blocked Massachusetts from unlocking new offshore wind from its own coasts, dealing a crucial blow to the state’s energy transition. So Gov. Maura Healey is testing the waters to the north instead.

A view of the Environmental Protection Agency sign on the side of a building

EPA oil and gas enforcement drops in New Mexico under Trump

Oil and gas production has directly and indirectly generated record amounts of hard-to-dispose-of oilfield wastewater, raised the specter of $1.6 billion in cleanup costs for abandoned wells and fouled the air in the oilfields.

A person holding wires coming out of an electrical box

This surprise cost could derail your heat pump or EV charger installation. Here’s how to avoid it

If all goes to plan, I will spend a grand total of zero dollars on an electrification project that could have cost me well over $10,000.
A view of the U.S. congressional building in Washington, DC

The unlikely allies behind Congress’ new energy deal

BAAJA would speed up solar projects — and data centers. Is it worth the compromise?

From our Newsroom
Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

One facility has emitted cancer-causing chemicals into waterways at levels up to 520% higher than legal limits.

Regulators are underestimating health impacts from air pollution: Study

Regulators are underestimating health impacts from air pollution: Study

"The reality is, we are not exposed to one chemical at a time.”

Pennsylvania governor Josh Shapiro speaks with the state flag and American flag behind him.

Two years into his term, has Gov. Shapiro kept his promises to regulate Pennsylvania’s fracking industry?

A new report assesses the administration’s progress and makes new recommendations

silhouette of people holding hands by a lake at sunset

An open letter from EPA staff to the American public

“We cannot stand by and allow this to happen. We need to hold this administration accountable.”

wildfire retardants being sprayed by plane

New evidence links heavy metal pollution with wildfire retardants

“The chemical black box” that blankets wildfire-impacted areas is increasingly under scrutiny.

Stay informed: sign up for The Daily Climate newsletter
Top news on climate impacts, solutions, politics, drivers. Delivered to your inbox week days.