Hardness
Very Hard
308.5 PPM · 18 GPG
Local water dashboard
Official source aggregationA source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Kosciusko County.
At a glance
EPA quarter 2026Q2
Hardness
Very Hard
308.5 PPM · 18 GPG
Compliance screen
Review needed
1 active health-based record
Lead 90th percentile
0 mg/L
0% of action level
Utility match
2 systems
Serves 122 people system-wide
Hardness meter
Estimated local hardness
USGS hardness classification scale
308.5 PPM
Parts per million
308.5
mg/L as CaCO₃ equivalent
Grains per gallon
18
1 GPG ≈ 17.1 PPM
What this means at home
At 308.5 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
30
Nearest site
37.4 mi
Observation range
Jun 20, 2016–May 13, 2026
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: Shavehead Lake Fen piezometer 2b- Cass County, MI (Well).USGS source documentation ↗
Regional context
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
North Webster median
309 PPM
About the same1 indexed ZIP readings · Range 308.5–308.5 PPM
Indiana median
313 PPM
About the same472 indexed ZIP readings · Range 132–371 PPM
EPA benchmark screen
Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.
Lead (PB90)
0 mg/L
Reported Jun 30, 2026
Copper (CU90)
7.5 mg/L
Reported Dec 31, 2024
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Measured in mg/L
Local 0
EPA limit 0.015
Measured in mg/L
Local 7.5
EPA limit 1.3
100% line = listed limit
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Lead and Copper RuleHealth-based | IN5243005 | Unaddressed | Jan 1, 2026 |
| Consumer Confidence Rule | IN5243005 | Unaddressed | Oct 1, 2025 |
| Revised Total Coliform Rule | IN5243005 | Resolved | Jul 1, 2024through Jul 31, 2024 |
| Lead and Copper RuleHealth-based | IN5243005 | Resolved | Jan 1, 2024through Jun 2, 2025 |
| Lead and Copper Rule | IN5243005 | Resolved | Jan 1, 2024through Jan 31, 2024 |
| Lead and Copper Rule | IN5243005 | Resolved | Jan 1, 2024through Mar 12, 2025 |
No reported violation does not prove that every contaminant was tested or absent; SDWIS measured values are incomplete and lag state records.
Solutions matcher
Matched to North Webster ZIP 46555 using 308.5 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
308.5 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 systemsDrinking water protection
Copper (90th percentile), Lead and Copper Rule 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
EPA ECHO reports 1 active health-based violation among the associated community water systems. Review the affected utility's current notice and Consumer Confidence Report.
Nearby USGS observations produce an estimate of 308.5 PPM, or 18 grains per gallon, classified as very hard. This is not a household tap measurement.
At 308.5 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.