 Atmospheric ◦ Deposition of nutrients from atmosphere  Fertilizer ◦ Can result in application of nitrogen & phosphorous ◦ Restricted use (Ordinance 2011-017)  No phosphorous application June 1 to September 30  < 4 lbs of nitrogen can be applied / yr / 1,000 sf  < 0.5 lbs of phosphorous can be applied / yr / 1,000 sf  Other (Animals, etc.)