We read 17 results from Metro Water Services’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 778,153 people · Water system ID TN0000494 · Read the district’s 2025 report (opens in a new tab)
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Results from the 2025 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Arsenicaverage · range 0.1 to 0.1 · printed as 0.0001 mg/L · sampled 2022 · Entry points · 2025 report, page 1 | 0.1 ppb | 0.004 ppb | 10 ppb | Above the health goal25x the health goal |
| Aluminumaverage · range 0.02 to 0.02 · sampled 2022 · Entry points · 2025 report, page 1 | 0.02 ppm | — | 0.2 ppm guideline | Within the guideline |
| Bariumaverage · range 0.02 to 0.02 · sampled 2022 · Entry points · 2025 report, page 1 | 0.02 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorideaverage · range 7.5 to 16.4 · Entry points · 2025 report, page 1 | 13.5 ppm | — | 250 ppm guideline | Within the guideline |
| Chromium (total)average · range 1.5 to 1.6 · printed as 0.0016 mg/L · sampled 2022 · Entry points · 2025 report, page 1 | 1.6 ppb | None set | 100 ppb | Below the legal limit |
| Disinfection byproducts (HAA5)average · range 3 to 12 · Distribution system · 2025 report, page 2 | 7.4 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)average · range 7.4 to 19.3 · Distribution system · 2025 report, page 2 | 12.1 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.56 to 0.75 · Entry points · 2025 report, page 1 | 0.67 ppm | 1 ppm | 4 ppm | Below the health goal |
| Gross alpha (radioactivity)as reported · Entry points · 2025 report, page 3 | Not detected | 0 pCi/L | 15 pCi/L | Not detected |
| Manganeseaverage · sampled 2022 · Entry points · 2025 report, page 1 | 0.0012 ppm | — | 0.05 ppm guideline | Within the guideline |
| Nitrate (as N)average · range 0.34 to 0.39 · Entry points · 2025 report, page 1 | 0.36 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHaverage · range 7.05 to 7.41 · Entry points · 2025 report, page 1 | 7.19 | — | — | Normal range |
| Sulfateaverage · range 27.1 to 43.9 · Entry points · 2025 report, page 1 | 35.9 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidsaverage · range 128 to 189 · Entry points · 2025 report, page 1 | 146 ppm | — | 500 ppm guideline | Within the guideline |
| Hardnessaverage · range 3.74 to 5.42 · Entry points · 2025 report, page 3 | 4.4 gpg (75.3 ppm) | — | — | Moderately hard |
| Nickelaverage · range 1 to 1 · printed as 0.0010 mg/L · sampled 2022 · Entry points · 2025 report, page 1 | 1 ppb | None set | None | No health limit |
| Sodiumaverage · range 11.7 to 12.9 · Entry points · 2025 report, page 3 | 12.2 ppm | None set | None | No health limit |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.
What you can do
Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.
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