In the mid-1980s, the RIM Program was established to quantify loads and long-term trends in concentrations of nutrients, such as nitrogen and phosphorus, and suspended material entering the tidal part of the Chesapeake...

This Environmental Protection Agency (EPA) website provides general information about dissolved oxygen, including what it is, sampling and equipment considerations, and sampling and analysis protocols. The site also...

This resource describes the pH scale and how changing pH levels affect water and the environment.

Water Science for Schools: Complete explanation of water basics. Describes water properties, common water measurements, capillary action, the water in you, and a true/false quiz.

Simple description of the chemical and physical properties of water produced by the U.S. Geological Survey.