From the NYTs here. An excerpt:

Now, apart from longstanding concern about harmful chemicals in the water that will be used to make that snow — piped directly from the sewage treatment system of the nearby town of Flagstaff — new research indicates that the wastewater system is a breeding ground for antibiotic-resistant genes.

The genes were not detectable in the plant itself but “increased dramatically” at the point of use, meaning that they were found in places like sprinkler heads, the study said. “This means bacteria is growing in the distribution pipes,” said Amy Pruden, the author and an associate professor of civil and environmental engineering at Virginia Tech.

The study has not been published or peer-reviewed, but Flagstaff officials are taking it seriously enough to have invited Dr. Pruden to serve on an advisory panel that the city formed last week.

Antibiotic-resistant genes are an area of emerging concern to scientists because they impede the body’s ability to fight disease.