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Data Management

Staff of Charlotte-Mecklenburg Storm Water Services (CMSWS) performs field tests for

  • pH
  • temperature
  • dissolved oxygen
  • conductivity
  • turbidity
  • chlorophyll a. 

Data is compiled onto field data sheets, attached to a chain of custody form and provided to a Quality Assurance and Quality Control (QA/QC) Officer with CMSWS on the same day field measurements are collected. Water samples are also collected with field measurements and delivered for analysis to the certified laboratory owned and operated by Charlotte-Mecklenburg Utilities located at 4222 Westmont Drive in Charlotte. The laboratory provides finalized data electronically and in hard copy to the QA/QC Officer within 45 days of sample collection. All field and laboratory data received by the QA/QC Officer is compiled, reviewed, verified, validated, and warehoused. Immediately upon receipt of data, the QA/QC Officer reports exceedances of State standards as well as local Action levels to Water Quality Program Supervisors who dispatch staff to identify and eliminate pollution sources. On at least a monthly basis, data is quality assured and added to the Water Quality Data Repository (WQDR). In addition, the QA/QC Officer prepares summaries of data on a monthly, quarterly and annual basis that are used by staff to identify water quality trends for initiation of corrective actions as necessary.



1.    1969 to 1984: All data was hand written into logs many of which are still on file.
2.    1984 to 1993: Data was maintained in a Lotus database.
3.    1993 to 2004: Data was maintained in the Environmental Protection Information Center (EPIC), which was a FoxPro based data management network.
4.    2004 to Present: Data is maintained in a custom water quality database application developed by Charlotte-Mecklenburg Storm Water Services.  Please note: electronic versions of data are only available from 1985 to present.  

Quality Assurance Project Plan (QAPP):

Read additional monitoring program information, including quality assurance and quality control protocol.