Hardness
Very Hard
338 PPM · 19.8 GPG
Local water dashboard
Official source aggregationWater quality in Keytesville, MO 65261
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Chariton County.
2 reported benchmark flags
- Primary matched system
- Keytesville Pws
- Source water
- Groundwater
- County
- Chariton 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 mg/L
0% of action level
Utility match
1 system
Serves 500 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
338 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
338
mg/L as CaCO₃ equivalent
Grains per gallon
19.8
1 GPG ≈ 17.1 PPM
What this means at home
At 338 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
18
Nearest site
28.3 mi
Observation range
Apr 11, 2016–Apr 9, 2026
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: STRVPAS1 MO03 (Well).USGS source documentation ↗
Regional context
Is 65261 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Keytesville median
338 PPM
About the same1 indexed ZIP readings · Range 338–338 PPM
Missouri median
236 PPM
102 PPM higher556 indexed ZIP readings · Range 38.3–483 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 mg/L
Reported Dec 31, 2023
Copper (CU90)
3.35 mg/L
Reported Dec 31, 2013
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
EPA limit 0.015
Copper (90th percentile)
Measured in mg/L
Local 3.35
EPA limit 1.3
TTHM
Measured in UG/L
Local 96
EPA limit 0.08
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 7
- Health-based
- 4
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| TTHMHealth-basedReported 96 UG/L · MCL 0.08 | MO2010420 | Archived | Jan 1, 2026through Mar 31, 2026 |
| TTHMHealth-basedReported 95.4 UG/L · MCL 0.08 | MO2010420 | Archived | Oct 1, 2025through Dec 31, 2025 |
| LEAD AND COPPER RULE REVISIONS | MO2010420 | Unaddressed | Jul 2, 2025 |
| Groundwater Rule | MO2010420 | Resolved | Jul 1, 2025through Jul 31, 2025 |
| TTHMHealth-basedReported 93.05 UG/L · MCL 0.08 | MO2010420 | Archived | Jul 1, 2025through Sep 30, 2025 |
| Groundwater Rule | MO2010420 | Resolved | Jan 1, 2024through Jan 31, 2024 |
| TTHMHealth-basedReported 84 UG/L · MCL 0.08 | MO2010420 | Resolved | Jul 1, 2022through Sep 30, 2022 |
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 Keytesville ZIP 65261 using 338 PPM nearby hardness and 3 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
338 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
Under-Sink Reverse Osmosis System
Copper (90th percentile), 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 Keytesville
Is tap water safe in Keytesville?+
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 338 PPM, or 19.8 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 338 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.