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) | 12 | 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) | 12 | 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) | 12 | 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 |
