# Clarksville, TN — Drinking Water Quality (2024)

> Contaminant levels for the Clarksville, TN public water system from its 2024 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/tn/clarksville/2024
- JSON API: https://www.thewatermap.com/api/water/tn/clarksville/2024
- Source: the utility's annual Consumer Confidence Report (CCR)
- Verification: transcribed by a model, cross-checked by a second model, approved before publishing
- Reporting year: 2024
- Contaminants measured: 16
- Contaminants with a federal limit: 13
- Contaminants at or above the federal limit: 1
- Part of The Water Map — https://www.thewatermap.com

## Contaminants measured

| Contaminant | Category | Measured level | Sampling context | Federal limit | Status |
|---|---|---|---|---|---|
| Chloramine | Disinfectants | 2.2 mg/L (Reported level) | System-wide | 4 mg/L (MRDLG) | Within the limit |
| Cyanide | Inorganic chemicals | 2.8 ug/L (Reported level) | System-wide | 200 ug/L (MCLG) | Within the limit |
| Fluoride | Inorganic chemicals | 0.99–1.41 mg/L (Range) | System-wide | 4 mg/L (MCLG) | Within the limit |
| Arsenic | Metals | 0.194–1.96 ug/L (Range) | System-wide | 0 ug/L (MCLG) | Detected — no federal limit |
| Barium | Metals | 0.023 mg/L (Reported level) | System-wide | 2 mg/L (MCLG) | Within the limit |
| Chromium, Total | Metals | 1.08–4.24 ug/L (Range) | System-wide | 100 ug/L (MCLG) | Within the limit |
| Copper | Metals | 0.901 mg/L (90th percentile) | At the tap | 1.3 mg/L (MCLG) | Within the limit |
| Lead | Metals | 7.77 ug/L (90th percentile) | At the tap | 0 ug/L (MCLG) | Detected — no federal limit |
| Manganese | Metals | 200 ug/L (Reported level) | System-wide | 150 ug/L (MCLG) | At or above the limit |
| Selenium | Metals | 2.79 ug/L (Reported level) | System-wide | 50 ug/L (MCLG) | Within the limit |
| Sodium | Metals | 119000 ug/L (Reported level) | System-wide | No federal limit | Detected — no federal limit |
| Zinc | Metals | 0–0.00934 mg/L (Range) | System-wide | 5 mg/L (MCLG) | Within the limit |
| Combined Radium | Radionuclides | 10–20204 (Reported level) | When all samples should have been taken | No federal limit | Detected — no federal limit |
| Gross Alpha | Radionuclides | 10–2024 (Reported level) | When all samples should have been taken | No federal limit | Detected — no federal limit |
| Uranium | Radionuclides | 1.06684 ug/L (Reported level) | System-wide | 0 ug/L (MCLG) | Detected — no federal limit |
| Benzo(a)pyrene | VOCs & pesticides | 20 ng/L (Maximum) | System-wide | 0 ng/L (MRDLG) | Detected — no federal limit |

## What these contaminants are

- **Chloramine** — A longer-lasting disinfectant made by combining chlorine with ammonia. Holds disinfection further into the pipe network, but is regulated under the same residual-disinfectant cap as chlorine.
- **Fluoride** — A mineral often added to drinking water to help prevent tooth decay. Beneficial at low levels, but long-term exposure above the federal limit can cause bone disease and tooth mottling.
- **Arsenic** — A naturally occurring element that also enters water from industry and agriculture. A known human carcinogen; long-term exposure is linked to skin, bladder, and lung cancer.
- **Barium** — A metal from erosion of natural deposits and industrial discharge. Long-term exposure above the federal limit can raise blood pressure.
- **Chromium, Total** — Total chromium — the sum of all chromium forms, from natural deposits and industrial discharge. Long-term exposure above the federal limit can cause allergic dermatitis; includes hexavalent chromium.
- **Copper** — A metal that enters water from corroding household plumbing. Short-term exposure causes stomach distress; long-term exposure can damage the liver and kidneys.
- **Lead** — A toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. There is no safe level of lead; it harms brain development in children and raises blood pressure in adults. The EPA sets an action level, not a health goal above zero.
- **Manganese** — A naturally occurring metal from soil and rock. No enforceable federal limit; high levels stain fixtures and laundry and can affect taste, with a health advisory for infants.
- **Selenium** — A trace element from natural deposits and industrial discharge. Essential in tiny amounts, but long-term exposure above the federal limit can cause hair and fingernail loss and circulatory problems.
- **Sodium** — A naturally occurring salt component. Not federally regulated for health; relevant for people on sodium-restricted diets.
- **Zinc** — A naturally occurring metal that can also enter water from corroding pipes. Regulated only as a secondary (cosmetic) standard; high levels cause a metallic taste.
- **Combined Radium** — Combined radium-226 and radium-228 — naturally occurring radioactive elements. Long-term exposure above the federal limit increases the risk of bone cancer.
- **Gross Alpha** — Gross alpha particle activity — a combined measure of alpha-emitting radioactive substances. Long-term exposure above the federal limit increases cancer risk.
- **Uranium** — A naturally occurring radioactive metal from erosion of natural deposits. Long-term exposure above the federal limit can damage the kidneys and increase cancer risk.

## How to read this

- A water-quality report covers an entire service area, not a single address.
- 'Federal limit' is the EPA standard (MCL, action level, treatment technique, etc.) that the measured level is compared against.
- 'At or above the federal limit' means the utility's own reported figure met or exceeded that standard.

_Figures are the utility's own published numbers. Generated 2026-05-25 from thewatermap.com._