Hardness
Hard
130 PPM · 7.6 GPG
Local water dashboard
Official source aggregationWater quality in Joplin, MO 64804
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Newton County.
No active health-based violation reported
- Primary matched system
- Mo American Joplin
- Source water
- Surface water + Groundwater
- County
- Newton 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
0.004 mg/L
27% of action level
Utility match
5 systems
Serves 73,728 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
130 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
130
mg/L as CaCO₃ equivalent
Grains per gallon
7.6
1 GPG ≈ 17.1 PPM
What this means at home
At 130 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
37
Nearest site
0.2 mi
Observation range
Jan 6, 2016–Apr 21, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: Shoal Creek above Joplin, MO (Stream).USGS source documentation ↗
Regional context
Is 64804 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Joplin median
137 PPM
7 PPM lower2 indexed ZIP readings · Range 130–144 PPM
Missouri median
236 PPM
106 PPM lower556 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 pass
Lead (PB90)
0.004 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 0.004
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 18
- Health-based
- 2
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| E. COLI | MO5048995 | Resolved | Dec 1, 2025through Dec 23, 2025 |
| LEAD AND COPPER RULE REVISIONS | MO5010678 | Unaddressed | Jul 2, 2025 |
| Groundwater Rule | MO5048274 | Resolved | Jul 1, 2025through Jul 31, 2025 |
| Revised Total Coliform Rule | MO5048995 | Resolved | Feb 1, 2025through Feb 28, 2025 |
| Revised Total Coliform Rule | MO5048274 | Resolved | Nov 1, 2024through Nov 30, 2024 |
| Groundwater Rule | MO5048274 | Resolved | Nov 1, 2024through Nov 30, 2024 |
| LEAD AND COPPER RULE REVISIONS | MO5048274 | Unaddressed | Oct 17, 2024 |
| LEAD AND COPPER RULE REVISIONS | MO5048995 | Resolved | Oct 17, 2024through Jan 7, 2025 |
| Groundwater Rule | MO5048274 | Resolved | Oct 1, 2024through Oct 31, 2024 |
| Groundwater Rule | MO5048274 | Resolved | Feb 1, 2024through Feb 29, 2024 |
| Groundwater Rule | MO5048274 | Resolved | Oct 1, 2023through Oct 31, 2023 |
| Revised Total Coliform Rule | MO5048274 | Resolved | Oct 1, 2023through Oct 31, 2023 |
| Revised Total Coliform Rule | MO5048995 | Resolved | Aug 1, 2023through Aug 31, 2023 |
| Public Notice | MO5048274 | Resolved | Mar 8, 2022through Jul 27, 2022 |
| Revised Total Coliform Rule | MO5048225 | Resolved | Mar 1, 2022through Mar 31, 2022 |
| Groundwater RuleHealth-based | MO5048274 | Resolved | Dec 5, 2021through Apr 22, 2022 |
| Public Notice | MO5048274 | Resolved | Nov 9, 2021through Jul 27, 2022 |
| Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-based | MO5048274 | Resolved | Sep 29, 2021through Apr 22, 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 Joplin ZIP 64804 using 130 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
130 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.
Nearby indexed reports
Compare ZIPs in Joplin
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Joplin
Is tap water safe in Joplin?+
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 130 PPM, or 7.6 grains per gallon, classified as hard. This is not a household tap measurement.
Do I need a water softener?+
At 130 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.