From The Fort Collins Coloradoan (Jacy Marmaduke):
Water quality is a sticking point for Thornton, which faces challenges getting all its water to drinking quality standards. Much of the city’s water comes from the South Platte River and requires extensive treatment because it’s diverted downstream of many areas of runoff and pollution, [Emily] Hunt said.
If Thornton drew the water from the Poudre near Windsor as suggested, the city would end up with water run downstream of three wastewater treatment plants and numerous runoff areas, [Mark] Koleber said.
“Urban runoff, agricultural runoff, wastewater plants, industrial discharge — it’s just not what you do for a municipal drinking water supply,” he said.
Especially considering Thornton bought the [rights to divert] because of its high quality, Hunt added.