Hardness
Hard
178 PPM · 10.4 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 Mcdonald County.
At a glance
EPA quarter 2026Q2
Hardness
Hard
178 PPM · 10.4 GPG
Compliance screen
No active flag
0 active health-based records
Lead 90th percentile
0.0058 mg/L
38% of action level
Utility match
1 system
Serves 373 people system-wide
Hardness meter
Estimated local hardness
USGS hardness classification scale
178 PPM
Parts per million
178
mg/L as CaCO₃ equivalent
Grains per gallon
10.4
1 GPG ≈ 17.1 PPM
What this means at home
At 178 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
45
Nearest site
4.1 mi
Observation range
May 4, 2016–Sep 4, 2025
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: T21N R33W 15DDD1 (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.
Lanagan median
178 PPM
About the same1 indexed ZIP readings · Range 178–178 PPM
Missouri median
236 PPM
58 PPM lower556 indexed ZIP readings · Range 38.3–483 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)
0.0058 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.
Measured in mg/L
Local 0.0058
EPA limit 0.015
100% line = listed limit
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| LEAD AND COPPER RULE REVISIONS | MO5010449 | Resolved | Oct 17, 2024through Apr 2, 2025 |
| Revised Total Coliform Rule | MO5010449 | Resolved | Jan 1, 2023through Jan 31, 2023 |
| Revised Total Coliform Rule | MO5010449 | Resolved | Jul 1, 2022through Jul 31, 2022 |
| Consumer Confidence Rule | MO5010449 | Resolved | Jul 1, 2022through Nov 29, 2022 |
| Nitrate-Nitrite | MO5010449 | Resolved | Jan 1, 2022through Dec 31, 2022 |
| Revised Total Coliform Rule | MO5010449 | Resolved | Aug 1, 2021through Aug 31, 2021 |
| Consumer Confidence Rule | MO5010449 | Resolved | Jul 1, 2021through Dec 6, 2021 |
| Revised Total Coliform Rule | MO5010449 | Resolved | Feb 1, 2021through Feb 28, 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
Matched to Lanagan ZIP 64847 using 178 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
178 PPM is 1× 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
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.
Nearby USGS observations produce an estimate of 178 PPM, or 10.4 grains per gallon, classified as hard. This is not a household tap measurement.
At 178 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.