Hardness
Moderately Hard
100 PPM · 5.8 GPG
Local water dashboard
Official source aggregationWater quality in Shelbyville, TN 37160
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Bedford County.
1 reported benchmark flag
- Primary matched system
- Shelbyville Water System
- Source water
- Surface water
- County
- Bedford County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
No active flag
0 active health-based records
Lead 90th percentile
0.001 mg/L
7% of action level
Utility match
2 systems
Serves 36,813 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
100 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
100
mg/L as CaCO₃ equivalent
Grains per gallon
5.8
1 GPG ≈ 17.1 PPM
What this means at home
At 100 PPM, mineral scale can build up on fixtures and heating elements, reduce soap lather, and leave visible spotting. Hardness is primarily an aesthetic and appliance concern—not itself a tap-water safety rating.
USGS sites used
51
Nearest site
16.2 mi
Observation range
Mar 7, 2022–Feb 3, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: Bd:R-002 (Well).USGS source documentation ↗
Regional context
Is 37160 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Shelbyville median
100 PPM
About the same1 indexed ZIP readings · Range 100–100 PPM
Tennessee median
50 PPM
50 PPM higher323 indexed ZIP readings · Range 4.5–247 PPM
EPA benchmark screen
Contaminant snapshot
Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.
1 pass1 fail
Lead (PB90)
0.001 mg/L
Reported Dec 31, 2025
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.001
EPA limit 0.015
Chlorine dioxide
Measured in MG/L
Local 0.93
EPA limit 0.8
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 12
- Health-based
- 8
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Chlorine dioxideHealth-basedReported 0.93 MG/L · MCL 0.8 | TN0000517 | Resolved | Aug 1, 2023through Aug 31, 2023 |
| Chlorine dioxideHealth-basedReported 0.83 MG/L · MCL 0.8 | TN0000517 | Resolved | Jul 1, 2023through Jul 31, 2023 |
| Long Term 2 Enhanced Surface Water Treatment RuleHealth-based | TN0000517 | Resolved | Apr 1, 2023through Apr 30, 2023 |
| Chlorine dioxideHealth-basedReported 0.93 MG/L · MCL 0.8 | TN0000517 | Resolved | Oct 1, 2022through Oct 31, 2022 |
| Consumer Confidence Rule | TN0000517 | Addressed | Jul 1, 2022 |
| Long Term 2 Enhanced Surface Water Treatment RuleHealth-based | TN0000517 | Resolved | May 1, 2022through May 31, 2022 |
| Long Term 2 Enhanced Surface Water Treatment RuleHealth-based | TN0000517 | Resolved | Feb 1, 2022through Feb 28, 2022 |
| Long Term 2 Enhanced Surface Water Treatment RuleHealth-based | TN0000517 | Resolved | Jan 1, 2022through Jan 31, 2022 |
| Long Term 2 Enhanced Surface Water Treatment RuleHealth-based | TN0000517 | Resolved | Feb 1, 2021through Feb 28, 2021 |
| TTHM | TN0000517 | Resolved | Jan 1, 2021through Mar 31, 2021 |
| Total Haloacetic Acids (HAA5) | TN0000517 | Resolved | Jan 1, 2021through Mar 31, 2021 |
| Consumer Confidence Rule | TN0000517 | Addressed | Jul 1, 2012 |
No reported violation does not prove that every contaminant was tested or absent; SDWIS measured values are incomplete and lag state records.
Solutions matcher
Your personalized water action plan
Matched to Shelbyville ZIP 37160 using 100 PPM nearby hardness and 2 reported measurement benchmarks.
Drinking water protection
Under-Sink Reverse Osmosis System
Chlorine dioxide has a measured benchmark flag or active health-based SDWIS record in this profile.
A certified multi-stage RO system targets a broader range of dissolved contaminants at the kitchen tap.
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Frequently asked
Water questions for Shelbyville
Is tap water safe in Shelbyville?+
EPA ECHO shows no active health-based violation for the associated systems in this reporting snapshot. This does not prove every contaminant is absent; federal records can lag and household plumbing can change tap conditions.
How hard is the water?+
Nearby USGS observations produce an estimate of 100 PPM, or 5.8 grains per gallon, classified as moderately hard. This is not a household tap measurement.
Do I need a water softener?+
There is no high-hardness trigger in this profile. Confirm with a tap test before buying equipment.