Hardness
Very Hard
363 PPM · 21.2 GPG
Local water dashboard
Official source aggregationWater quality in Mount Summit, IN 47361
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Henry County.
No active health-based violation reported
- Primary matched system
- Mount Summit Water Utility
- Source water
- Groundwater
- County
- Henry 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
0.0012 mg/L
8% of action level
Utility match
1 system
Serves 350 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
363 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
363
mg/L as CaCO₃ equivalent
Grains per gallon
21.2
1 GPG ≈ 17.1 PPM
What this means at home
At 363 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
81
Nearest site
4.2 mi
Observation range
Mar 30, 2016–Sep 10, 2025
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: NAWQA AG WELL TP8 AT NEW CASTLE, IN (Well).USGS source documentation ↗
Regional context
Is 47361 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Mount Summit median
363 PPM
About the same1 indexed ZIP readings · Range 363–363 PPM
Indiana median
313 PPM
50 PPM higher472 indexed ZIP readings · Range 132–371 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 pass
Lead (PB90)
0.0012 mg/L
Reported Dec 31, 2025
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
1 comparable result
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.0012
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 13
- Health-based
- 0
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Consumer Confidence Rule | IN5233009 | Resolved | Oct 7, 2024through Oct 16, 2024 |
| Revised Total Coliform Rule | IN5233009 | Resolved | Sep 1, 2024through Sep 30, 2024 |
| Consumer Confidence Rule | IN5233009 | Resolved | Jul 1, 2024through Aug 2, 2024 |
| Total Haloacetic Acids (HAA5) | IN5233009 | Archived | Jan 1, 2024through Dec 31, 2024 |
| TTHM | IN5233009 | Archived | Jan 1, 2024through Dec 31, 2024 |
| Revised Total Coliform Rule | IN5233009 | Resolved | May 1, 2023through May 31, 2023 |
| TTHM | IN5233009 | Archived | Jan 1, 2023through Dec 31, 2023 |
| Total Haloacetic Acids (HAA5) | IN5233009 | Archived | Jan 1, 2023through Dec 31, 2023 |
| Revised Total Coliform Rule | IN5233009 | Resolved | May 1, 2022through Jun 27, 2022 |
| Lead and Copper Rule | IN5233009 | Resolved | Jan 1, 2022through Oct 16, 2024 |
| Revised Total Coliform Rule | IN5233009 | Resolved | Sep 1, 2021through Sep 30, 2021 |
| Revised Total Coliform Rule | IN5233009 | Resolved | Jun 1, 2021through Jun 30, 2021 |
| Lead and Copper Rule | IN5233009 | Unaddressed | Jan 1, 2021 |
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 Mount Summit ZIP 47361 using 363 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
363 PPM is 3× the high-hardness trigger used by this matcher.
Designed to reduce scale on fixtures, water heaters, glassware, and plumbing throughout the home.
Compare whole-house systemsAffiliate 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 Mount Summit
Is tap water safe in Mount Summit?+
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 363 PPM, or 21.2 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 363 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.