There are many types of non-point source pollution.  Pet waste is one type of NPS that many people might not consider a potential problem. As the runoff moves over the land, it picks up and carries away  pollutants including pet waste, finally depositing them in surface water and even in underground sources of drinking water. Pet waste can introduce disease-bearing organisms to both surface and ground water.

Clean up after your pets. Pet waste is a significant source of excess nutrients and pathogens, which can seriously impair water quality.