csa Scientists check for effects of ag runoff; can a CSA ever be too big? By Rehman Tungekar • Jun 20, 2013 Abbie Fentress Swanson / Harvest Public Media Listen to this story Listening... / On this week's show, we'll discuss ag runoff and community supported agriculture. When it comes to CSAs, how big is too big? By Grace Hood • Jun 20, 2013 Grace Hood / Harvest Public Media Listen to this story Listening... / Last year, one of the country’s largest Community Supported Agriculture share providers went bankrupt. Grant Family Farms in Northern Colorado launched an organic CSA back in 2007 with 127 members and peaked with more than 5,000 in 2012.