Nitrate
- Learn how to read these charts on our River and stream flows page.
- Many timeseries can be downloaded from our Data Downloads page.
Nitrate is a naturally-occurring nitrogen compound. It may be present in surface water from a number of sources including runoff from agricultural lands where manure and/or chemical fertilizers have been applied and the discharge of treated sewage from municipal wastewater treatment plants. Nitrate is an important plant nutrient but too much can contribute to eutrophication – excessive growth of aquatic plants and algae. Nitrate is also a concern for drinking water supplies as high levels of nitrate can be toxic.
Provisional Data
Caution: Users of the GRCA's real-time data are cautioned to consider the provisional nature of the information before using it for decisions that concern personal or public safety or the conduct of business.
The Grand River Conservation Authority assumes no responsibility for the correctness of the information contained in this website nor liability to any user of such information, regardless of the purpose.
Warning! River levels and flows can change rapidly.