This is a rebuild of Drinking Water Watch and not yet the official record. Use the agency’s current Drinking Water Watch for anything you need to rely on.
Lead and copper summaries
Each row is one summary of one monitoring period, and the agency records more than one kind.
3,781–3,800 of 5,922 monitoring-period summaries. From monitoring periods beginning September 27, 2021 to September 27, 2026.
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Choose water systems
How to read a summary
Each row summarises one analyte over one monitoring period for one system. The number of samples behind each value is in the column beside it.
The agency records more than one kind of summary, and the Type column says which. Type 90 is the ninetieth percentile — the value 90% of that period’s samples fall at or below. The agency publishes no explanation for the other codes, so this page does not offer one: a value of another type is not a 90th percentile and must not be read as one.
| County | Water system | Analyte | Monitoring period | Facility | Samples | Measure |
|---|---|---|---|---|---|---|
| Madison | Cmu - Lake Caroline, MS0450034 | Copper | Jan 1, 2022 – Dec 31, 2024 | DS000 | 9 | 0.28 MG/L 90th percentile |
| Madison | Cmu - Lake Caroline, MS0450034 | Copper | Jan 1, 2022 – Dec 31, 2024 | DS000 | 9 | 0.32 MG/L |
| Madison | Cmu - Lake Caroline, MS0450034 | Copper | Jan 1, 2022 – Dec 31, 2024 | DS000 | 0 | Not recorded |
| Madison | Cmu - Lake Caroline, MS0450034 | Lead | Jan 1, 2022 – Dec 31, 2024 | DS000 | 9 | 0.0012 MG/L 90th percentile |
| Madison | Cmu - Lake Caroline, MS0450034 | Lead | Jan 1, 2022 – Dec 31, 2024 | DS000 | 9 | 0.0013 MG/L |
| Madison | Cmu - Lake Caroline, MS0450034 | Lead | Jan 1, 2022 – Dec 31, 2024 | DS000 | 0 | Not recorded |
| Marion | Bunker Hill Water Association, MS0460001 | Copper | Jan 1, 2024 – Dec 31, 2026 | DS000 | 10 | 0.115 MG/L 90th percentile |
| Marion | Bunker Hill Water Association, MS0460001 | Copper | Jan 1, 2024 – Dec 31, 2026 | DS000 | 10 | 0.144 MG/L |
| Marion | Bunker Hill Water Association, MS0460001 | Copper | Jan 1, 2024 – Dec 31, 2026 | DS000 | 0 | Not recorded |
| Marion | Bunker Hill Water Association, MS0460001 | Lead | Jan 1, 2024 – Dec 31, 2026 | DS000 | 10 | 0 MG/L 90th percentile |
| Marion | Bunker Hill Water Association, MS0460001 | Lead | Jan 1, 2024 – Dec 31, 2026 | DS000 | 10 | 0 MG/L |
| Marion | Bunker Hill Water Association, MS0460001 | Lead | Jan 1, 2024 – Dec 31, 2026 | DS000 | 0 | Not recorded |
| Marion | City of Columbia, MS0460003 | Copper | Jan 1, 2022 – Dec 31, 2024 | DS000 | 20 | 0.514 MG/L 90th percentile |
| Marion | City of Columbia, MS0460003 | Copper | Jan 1, 2022 – Dec 31, 2024 | DS000 | 20 | 0.6 MG/L |
| Marion | City of Columbia, MS0460003 | Copper | Jan 1, 2022 – Dec 31, 2024 | DS000 | 0 | Not recorded |
| Marion | City of Columbia, MS0460003 | Lead | Jan 1, 2022 – Dec 31, 2024 | DS000 | 20 | 0.0017 MG/L 90th percentile |
| Marion | City of Columbia, MS0460003 | Lead | Jan 1, 2022 – Dec 31, 2024 | DS000 | 20 | 0.0017 MG/L |
| Marion | City of Columbia, MS0460003 | Lead | Jan 1, 2022 – Dec 31, 2024 | DS000 | 0 | Not recorded |
| Marion | Foxworth Water & Sewerage Assn, MS0460005 | Copper | Jan 1, 2024 – Dec 31, 2026 | DS000 | 10 | 0.188 MG/L 90th percentile |
| Marion | Foxworth Water & Sewerage Assn, MS0460005 | Copper | Jan 1, 2024 – Dec 31, 2026 | DS000 | 10 | 0.413 MG/L |