Editor's Note: The National Association of Clean Water Agencies recently announced a partnership with the National Milk Producers Federation to make watershed-level water quality improvements. To read more about this important agreement, see "National Association of Clean Water Agencies Partners with National Milk Producers Federation."As clean-water plants face tightening permit limits for nitrogen and phosphorus, communities and their utilities increasingly look upstream for solutions.In most watersheds, more nutrients enter the waterways through nonpoint sources than from treatment plant outfalls, and it makes sense to look for ways to reduce those loadings as a big part of the answer to
