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Monitoring results

These items must be included when presenting lead and copper data in the data table:

  • The action level and the maximum contaminant level goal (MCLG) for both lead and copper.
  • The most recent 90th percentile value (if sampling was done in both six-month rounds, both sets of 90th percentile data should be included in the CCR).
  • The range of individual samples.
  • The number of samples above each action level.
  • The year that sampling occurred.
  • The updated “Typical Source of Contaminant” language:
    • For lead: Lead service lines, corrosion of household plumbing including fittings and fixtures; Erosion of natural deposits
    • For copper: Corrosion of household plumbing systems; Erosion of natural deposits

These results come directly from the 90th percentile letter from EGLE following the completion of a monitoring record.

Example table to report annual or triennial monitoring results

Inorganic contaminant subject to action levels Action level Maximum contaminant level goal Your water Range of results Year sampled Number of samples above action level Typical source of contaminant
Lead (ppb) 15 0 Insert your data Insert your data Year Insert your data Lead service lines, corrosion of household plumbing including fittings and fixtures, erosion of natural deposits
Copper (ppm) 1.3 1.3 Insert your data Insert your data Year Insert your data Corrosion of household plumbing systems, erosion of natural deposits

Example table to report recent six-month monitoring results

Inorganic contaminant subject to action levels Action level Maximum contaminant level goal Your water Range of results Year sampled Number of samples above action level Typical source of contaminant
Lead (ppb) 15 0 Insert your data Insert your data January-June Year Insert your data Lead service lines, corrosion of household plumbing including fittings and fixtures, erosion of natural deposits
Copper (ppm) 1.3 1.3 Insert your data Insert your data January-June Year Insert your data Corrosion of household plumbing systems, erosion of natural deposits
Lead (ppb) 15 0 Insert your data Insert your data July-December Year Insert your data Lead service lines, corrosion of household plumbing including fittings and fixtures, erosion of natural deposits
Copper (ppm) 1.3 1.3 Insert your data Insert your data July-December Year Insert your data Corrosion of household plumbing systems, erosion of natural deposits

person showing glass of water, focus on glass of water

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The Consumer Confidence Report (CCR) Rule requires community water supplies to annually report to their customers on the quality of the drinking water and the sources of that water, and to characterize the risks (if any) from exposure to contaminants detected in the water.