Ecological & Associates offers the most competitive prices on fill & topsoil delivery in Suffolk County and the New York area. We also deliver and spread top soil for our clients. Many people wonder what the difference is between topsoil and dirt. Organic soil is free from chemicals & pesticides that harm people and the environment. Screened topsoil is also free from stones, glass and other unwanted contaminants. Our high quality top soil promotes healthy growth of plant life, grass and sod.