Tap Water Quality Report
Tap water quality in Nashville, Tennessee
Tap water in Nashville, Tennessee receives a grade of B (80/100) from TapWaterSafety.org. It's served by 2 public water systems, primarily METRO WATER SERVICES. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in Nashville's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utilities serving Nashville.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 33.9 ppb, 565x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 20.4 ppb, 204x above the EWG health guideline of 0.1 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 27.3 ppb, 182x above the EWG health guideline of 0.15 ppb.
EPA compliance record
Official U.S. EPA records for METRO WATER SERVICES (system ID TN0000494) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Missed testing or reporting | 04/01/2024 | Resolved |
| Revised Total Coliform Rule | Missed testing | 05/01/2024 | Resolved |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Water systems serving Nashville
Nashville is served by 2 public water systems. Click any utility to see its complete grade card and treatment plant contact info.
METRO WATER SERVICES
- Haloacetic acids (HAA9) significantly above health guideline
- Haloacetic acids (HAA5) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
HARPETH VALLEY U.D.
- Haloacetic acids (HAA9) significantly above health guideline
- Haloacetic acids (HAA5) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
Recommended filters for Nashville
Filters matched to the specific contaminants in Nashville's water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in Nashville's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
33.9 ppb | 0.06 | — | — | — | — | — | 565× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
24.5 ppb | 0.1 | 60.0 | 60 | — | — | — | 245× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
34.6 ppb | 0.15 | 80.0 | 100 | — | — | — | 231× over |
| Trichloroacetic acid Disinfection byproduct |
12.9 ppb | 0.1 | — | — | — | — | — | 129× over |
| Bromodichloromethane Disinfection byproduct |
5.97 ppb | 0.06 | — | — | — | — | — | 100× over |
| Chloroform Disinfection byproduct |
27.9 ppb | 0.4 | — | — | — | — | — | 70× over |
| Dichloroacetic acid Disinfection byproduct |
10.9 ppb | 0.2 | — | — | — | — | — | 55× over |
| Dibromochloromethane Disinfection byproduct |
0.568 ppb | 0.1 | — | — | — | — | — | 5.7× over |
| Chromium (hexavalent) Heavy metal |
0.106 ppb | 0.02 | — | — | — | — | — | 5.3× over |
| Nitrate Inorganic |
0.415 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 3.0× over |
| Manganese Heavy metal |
3.24 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Barium Heavy metal |
17.7 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.73 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.215 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.116 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.669 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from METRO WATER SERVICES.
General Contact
Treatment Plant
ZIP codes served
Nashville's public water systems serve the following ZIP codes: