Minnesota is giving its water quality standards a fresh look. With public input in their hands, officials are under pressure to add language about nitrate levels, a move some said is long overdue.
Nitrate pollution is often tied to farm runoff containing fertilizers and animal waste. There are standards for drinking water but conservation groups want a nitrate standard for lakes and rivers.
Trevor Russell, water program director for Friends of the Mississippi River, said the effort has been building for more than 15 years but final action has been hard to come by. While it is difficult to keep waterways perfectly clean, he pointed out it is helpful to have scientific thresholds.
"We want them to be relatively healthy for fish and other aquatic life," Russell explained. "That's what we're managing for when you set a water quality standard."
His group was encouraged to see wording on the topic in a draft proposal. Russell hopes the Minnesota Pollution Control Agency can hold off political pushback and not exclude it from the final plan. Public comment just wrapped up and the plan will soon be sent for federal review.
Minnesota has been aggressive in other ways to curb nitrate pollution, for which Russell gives the state credit.
The farming sector might not be overjoyed at the potential of a new nitrate standard but Russell noted many producers have joined the movement to limit their runoff. Still, he said even with actions like these, getting the problem under control will not be easy.
"About 15% of nitrogen application to Minnesota's farm fields is going to run off into our waters no matter what farmers do," Russell acknowledged. "It is the nature of nitrate and it is the risk that comes with our reliance on summer annual cropping systems that need to be fertilized."
If a nitrate standard is included, Russell emphasized Minnesota has a robust monitoring system in place to detect excessive levels, spurring a likely cleanup response. The Minnesota Pollution Control Agency said updating the standards is required every three years. It also covers bacteria, which can make the water unsafe for swimming, as well as so-called "forever chemicals" from industrial waste.
This story is republished with permission by the Minnesota News Connection, part of the Public News Service.
