Hardness
Moderately Hard
83.6 PPM · 4.9 GPG
Local water dashboard
Official source aggregationWater quality in Dover, TN 37058
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Stewart County.
2 reported benchmark flags
- Primary matched system
- North Stewart Utility District
- Source water
- Surface water + Groundwater influenced by surface water + Groundwater
- County
- Stewart 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
5 systems
Serves 5,983 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
83.6 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
83.6
mg/L as CaCO₃ equivalent
Grains per gallon
4.9
1 GPG ≈ 17.1 PPM
What this means at home
At 83.6 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
1
Nearest site
54.7 mi
Observation range
Jan 4, 2016–May 20, 2026
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: TENNESSEE RIVER AT HIGHWAY 60 NEAR PADUCAH, KY (Stream).USGS source documentation ↗
Regional context
Is 37058 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Dover median
84 PPM
About the same1 indexed ZIP readings · Range 83.6–83.6 PPM
Tennessee median
50 PPM
34 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 pass2 fail
Lead (PB90)
0.001 mg/L
Reported Dec 31, 2025
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
3 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
Total Haloacetic Acids (HAA5)
Measured in MG/L
Local 0.0611
EPA limit 0.06
TTHM
Measured in MG/L
Local 0.0833
EPA limit 0.08
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 23
- Health-based
- 6
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | TN0000960 | Archived | Jul 1, 2025through Sep 30, 2025 |
| TTHM | TN0000960 | Archived | Jul 1, 2025through Sep 30, 2025 |
| Groundwater RuleHealth-based | TN0000916 | Resolved | Jun 1, 2023through Jun 30, 2023 |
| Groundwater RuleHealth-based | TN0000916 | Resolved | Oct 1, 2022through Oct 31, 2022 |
| Groundwater RuleHealth-based | TN0000916 | Resolved | Oct 1, 2022through Oct 31, 2022 |
| Groundwater RuleHealth-based | TN0000916 | Resolved | Oct 1, 2022through Oct 31, 2022 |
| Consumer Confidence Rule | TN0000962 | Resolved | Jul 1, 2022through Dec 27, 2023 |
| Total Haloacetic Acids (HAA5) | TN0000960 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| TTHM | TN0000960 | Resolved | Jul 1, 2022through Sep 30, 2022 |
| Total Haloacetic Acids (HAA5)Health-basedReported 0.0611 MG/L · MCL 0.06 | TN0000195 | Resolved | Apr 1, 2022through Jun 30, 2022 |
| TTHMHealth-basedReported 0.0833 MG/L · MCL 0.08 | TN0000195 | Resolved | Apr 1, 2022through Jun 30, 2022 |
| Lead and Copper Rule | TN0000962 | Resolved | Jan 1, 2022through Dec 27, 2023 |
| Public Notice | TN0000195 | Resolved | Dec 10, 2021through Mar 10, 2022 |
| Public Notice | TN0000195 | Resolved | Jul 18, 2021through Mar 10, 2022 |
| Consumer Confidence Rule | TN0000195 | Resolved | Jul 1, 2021through Jul 1, 2022 |
| Total Haloacetic Acids (HAA5) | TN0000962 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| TTHM | TN0000962 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| Revised Total Coliform Rule | TN0000195 | Resolved | Jan 1, 2021through Jan 31, 2021 |
| Public Notice | TN0000960 | Unaddressed | Sep 11, 2020 |
| Revised Total Coliform Rule | TN0000195 | Addressed | Jan 20, 2018 |
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 Dover ZIP 37058 using 83.6 PPM nearby hardness and 3 reported measurement benchmarks.
Drinking water protection
Under-Sink Reverse Osmosis System
Total Haloacetic Acids (HAA5), TTHM have 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.
Explore under-sink filtrationAffiliate disclosure: we may earn a commission from qualifying purchases, at no added cost to you. Product matching is educational and does not replace certified water testing.
Frequently asked
Water questions for Dover
Is tap water safe in Dover?+
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 83.6 PPM, or 4.9 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.