Surface Water Quality

​CMANN​ Program Overview

Charlotte-Mecklenburg Storm Water Services (CMSWS) maintains the Continuous Monitoring and Alert Notification Network (CMANN)​, a network of automated monitoring stations throughout the City of Charlotte and Mecklenburg County, to better understand and improve stream and lakes. The automated system alerts staff if pollution levels increase so they can follow up as soon as possible. It also allows staff to understand seasonal differences in water quality and assess if surface water quality is improving or degrading in watersheds over time.

​Each monitoring station collects data 24 hours a day on five different water quality parameters. The parameters are conductivity, dissolved oxygen, pH, temperature, and turbidity. Please see our "Links and Glossary of Terms" tab for more information about these parameters and what they mean.

This CMANN website contains a wealth of data and reporting tools. If you have questions, please contact Ryan Spidel (

Additional Water Quality Monitoring Activities

CMANN is only one of a variety of activities Charlotte-Mecklenburg Storm Water Services performs to monitor surface water quality and respond to pollution sources. Here's just a sample of other activities that they perform:

  • Almost 15,000 grab samples are collected per year​ and over 20 different parameters are routinely screened.
  • Fish communities are assessed at 10 locations.
  • Macroinvertebrate communities are assessed at 34 locations.

Please see the Water Quality​ tab on the Charlotte-Mecklenburg Storm Water Services for more information about these additional water quality monitoring activities.