Drug Testing Your City's Sewer System

If you really want to know how prevalent drug use is in your community, don't ask people–just test their wastewater.

1 minute read

January 27, 2014, 1:00 PM PST

By Jonathan Nettler @nettsj


More than 20 studies of European wastewater over the past decade have produced some interesting findings about the drug habits of residents of some of the continent's biggest cities. For instance: "In London, cocaine and ecstasy spike on weekends while methadone is used more consistently," writes Brian Bienkowski. While in Zagreb, Croatia, "marijuana and heroin were the most commonly found illicit drugs, but cocaine and ecstasy showed up more frequently on weekends." 

Though relatively novel (especially in the U.S.), the practice of testing sewage to gauge illegal drug use has begun to grow thanks to technological advancements and doubts over the quality of survey results. But the technique has raised raised legal concerns over privacy expectations.  

"Legal issues aside, there are some ethical concerns, said Jeremy Prichard, a professor of law at the University of Tasmania who wrote an article about the ethics of testing sewage for drugs. Since it's about illegal drugs, the research could attract media attention and stigmatize certain communities, Prichard said. He supports guidelines for researchers to protect people and communities."

Friday, January 24, 2014 in Environmental Health News

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Get top-rated, practical training

Aerial view of single-family homes with swimming pools in San Diego, California.

San Diego to Rescind Multi-Unit ADU Rule

The city wants to close a loophole that allowed developers to build apartment buildings on single-family lots as ADUs.

March 9, 2025 - Axios

Green electric Volkswagen van against a beach backdrop.

The VW Bus is Back — Now as an Electric Minivan

Volkswagen’s ID. Buzz reimagines its iconic Bus as a fully electric minivan, blending retro design with modern technology, a 231-mile range, and practical versatility to offer a stylish yet functional EV for the future.

March 3, 2025 - ABC 7 Eyewitness News

Canadian flag in foreground with blurred Canadian Parliament building in background in Ottawa, Ontario, Canada.

Has President Trump Met His Match?

Doug Ford, the no-nonsense premier of Canada's most populous province, Ontario, is taking on Trump where it hurts — making American energy more expensive.

March 11, 2025 - Toronto Star

Orange Biketown bike share bikes parked at station on sidewalk in Portland, Oregon,

Biketown Lives

Despite public perception of its decline, Portland’s bike share system is alive and well.

16 minutes ago - Willamette Week

Quiet tree-lined street in Stockholm, Sweden in summer.

‘Stockholm Tree Pit’ Saves Dying Urban Trees

After noticing that two-thirds of its trees were dying, Stockholm developed a new planting method to protect trees surrounded by concrete.

1 hour ago - Reasons to Be Cheerful

Green Detroit public transit electric bus with high-rise modenr building in background.

Analysis: Just 5 Percent of Detroit Bus Stops Have Shelters

The city’s thousands of bus stops are sorely lacking in seating and shelters to protect riders from rain, snow, and sun.

2 hours ago - Bridge Detroit