State distribution
Hardness across indexed ZIPs
Counts describe published ZIP profiles, not a population-weighted statewide sample.
Soft · 0–60 PPM119
Moderately hard · 61–120 PPM16
Hard · 121–180 PPM30
Very hard · 181+ PPM12
State water index
Tennessee water hardness
Search 222 indexed communities and 323 ZIP profiles, then compare the underlying utility, source, distance, and reporting context.
Median regional evidence
54PPM
Soft
Indexed range 4.5–276 PPM
- ZIP profiles
- 323
- Cities
- 222
- Matched utilities
- 293
- Counties
- 91
Understanding Tennessee
Why local comparisons matter here
Tennessee stretches from Appalachian watersheds through limestone-rich central basins to the Mississippi embayment in the west.
In this index, soft is the largest category, covering 119 of 177 profiles with hardness data. The state median is 54 PPM, but the full indexed range is 4.5–276 PPM.
Evidence coverage
What the current records support
- Hardness estimate
- 55%
- Lead 90th percentile
- 100%
- Copper 90th percentile
- 13%
40
Low-confidence hardness profiles
120
Research-comparison eligible profiles
Reported source water
Utility source mix
- Surface water
- 147
- Groundwater
- 124
- Groundwater influenced by surface water
- 22
Highest medians
Highest eligible city medians
- 1. Memphis59 PPM
- 2. Bartlett56 PPM
Lowest medians
Lowest eligible city medians
- 1. Bartlett56 PPM
- 2. Memphis59 PPM
City directory
Explore Tennessee by city
Search by city or county, then sort by name, hardness, or ZIP coverage.
222 cities · 323 ZIP profiles
222 cities found
Page 1 of 10
Adams
Robertson County · 1 ZIP
—
No regional sampleNo active flag
Alamo
Crockett County · 1 ZIP
38PPM regional
Single regional valueNo active flag
Alcoa
Blount County · 1 ZIP
5PPM regional
Single regional valueNo active flag
Alexandria
Dekalb County · 1 ZIP
—
No regional sampleNo active flag
Altamont
Grundy County · 1 ZIP
—
No regional sampleNo active flag
Ardmore
Lincoln County · 1 ZIP
47PPM regional
Single regional valueNo active flag
Athens
Mcminn County · 1 ZIP
—
No regional sampleNo active flag
Atoka
Tipton County · 1 ZIP
45PPM regional
Single regional valueNo active flag
Atwood
Carroll County · 1 ZIP
21PPM regional
Single regional valueNo active flag
Bartlett
Shelby County · 3 ZIPs
56PPM regional
Regional range 53.7–55.9No active flag
Baxter
Putnam County · 1 ZIP
—
No regional sampleNo active flag
Bean Station
Grainger County · 1 ZIP
—
No regional sampleNo active flag
Bell Buckle
Bedford County · 1 ZIP
—
No regional sampleNo active flag
Bells
Haywood County · 1 ZIP
25PPM regional
Single regional valueNo active flag
Benton
Polk County · 1 ZIP
174PPM regional
Single regional valueNo active flag
Bethel Springs
Mcnairy County · 1 ZIP
16PPM regional
Single regional valueNo active flag
Big Sandy
Benton County · 1 ZIP
42PPM regional
Single regional valueNo active flag
Bolivar
Hardeman County · 1 ZIP
17PPM regional
Single regional valueNo active flag
Bradford
Gibson County · 1 ZIP
21PPM regional
Single regional valueNo active flag
Brentwood
Williamson County · 1 ZIP
—
No regional sampleNo active flag
Brighton
Tipton County · 1 ZIP
49PPM regional
Single regional valueNo active flag
Bristol
Sullivan County · 2 ZIPs
—
No regional sampleNo active flag
Brownsville
Haywood County · 1 ZIP
18PPM regional
Single regional valueNo active flag
Bruceton
Carroll County · 1 ZIP
32PPM regional
Single regional valueNo active flag
County comparison
Highest regional-evidence county medians
| County | Median | Range | ZIP profiles |
|---|---|---|---|
| Hawkins County | 276 PPM | 276–276 | 4 |
| Hancock County | 270 PPM | 270–270 | 1 |
| Claiborne County | 228 PPM | 228–228 | 3 |
| Maury County | 220 PPM | 220–220 | 4 |
| Anderson County | 215 PPM | 210–219 | 5 |
| Dekalb County | 189 PPM | 183–195 | 4 |
| Sullivan County | 186 PPM | 186–186 | 6 |
| Mcminn County | 183 PPM | 182.5–182.5 | 5 |
| Monroe County | 174 PPM | 174–174 | 4 |
| Hamilton County | 170 PPM | 110–170 | 17 |
| Marion County | 170 PPM | 170–170 | 4 |
| Houston County | 165 PPM | 160–170.5 | 3 |