Non Point Source Water Pollution

This illustration explaining the complex, mostly invisible, process of non-point-source water pollution was created for a series of outdoor exhibit signage fro The Meadows Center for Water and the Environment at Texas State University.

Non Point-Source water pollution
Non Point-Source water pollution, illustration by Paul Mirocha

Non Point-Source water pollution



Your feet pound the pavement as you dash through the rain. You glance down and notice pieces of trash flowing beside the road. Where does all that trash come from?

Experts call this nonpoint source pollution (NPS) because it comes from many diffuse sources. Types of NPS include dirt, nutrients, bacteria, chemicals, oil, and trash. These pollutants flow unfiltered into our waterways. NPS threatens water quality across Texas.

NPS makes people sick and harms ecosystems like Spring Lake. Take a moment to look at Spring Lake. Is it worth protecting?

— text by Briane Willis, Interpretive Education Specialist,
Meadows Center for Water and the Environment



  1. tfhjdskx,
    March 23, 2016

    thanks for all the information
    about nps pollution
    I have learned alot

  2. Nancee
    July 20, 2015

    This is fantastic! I’m fighting my HOA board to stop the absolutely senseless spraying of pesticides. We are only 2 1/2 miles from the ocean, and they just don’t get that these chemicals will run off into the storm drains and into the ocean and cause harm to the ocean. They are also causing harm to us human residents and the whole biome in the soil.


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