The goal is to reduce the silt and nutrients going into the Chesapeake Bay where these lead to "dead zones" from algae blooms and kill off the bottom of the Bay with silt. What is next is tightening up on what and how much home owners can put on their lawns (starting to happen in MD). Ag has many large single point sources of runoff; lawns are thousands of runoff sources and in some regions may account for more runoff acreage than ag. As far as the watershed is concerned, it makes no difference if the runoff comes from farm fields or lawns.
Urban Fertilizers & the Chesapeake Bay: An Opportunity for Major Pollution ReductionHome owner associations are starting to complain about new rules to limit fertilizer and herbicide use even though they are probably all for making ag cut back. In 2014 44% of all fertilizer sold in MD was for lawn care and there are 1.3 million acres in turf grass compared to 1.5 million acres planted in all other crops.