Hardness
Moderately Hard
105.5 PPM · 6.2 GPG
Local water dashboard
Official source aggregationWater quality in Tishomingo, OK 73460
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Johnston County.
No active health-based violation reported
- Primary matched system
- Tishomingo Municipal Authority
- Source water
- Surface water
- County
- Johnston 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
9.0e-4 mg/L
6% of action level
Utility match
1 system
Serves 3,000 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
105.5 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
105.5
mg/L as CaCO₃ equivalent
Grains per gallon
6.2
1 GPG ≈ 17.1 PPM
What this means at home
At 105.5 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
20
Nearest site
20.6 mi
Observation range
Apr 4, 2016–May 20, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: Lk Texoma at Hwy 70 Bridge nr Little City, OK (Lake, Reservoir, Impoundment).USGS source documentation ↗
Regional context
Is 73460 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Tishomingo median
106 PPM
About the same1 indexed ZIP readings · Range 105.5–105.5 PPM
Oklahoma median
226 PPM
120 PPM lower148 indexed ZIP readings · Range 7–610 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)
9.0e-4 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 9.0e-4
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 22
- Health-based
- 14
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Chlorine | OK1010815 | Resolved | Nov 1, 2025through Nov 30, 2025 |
| Revised Total Coliform Rule | OK1010815 | Resolved | Nov 1, 2025through Nov 30, 2025 |
| Consumer Confidence Rule | OK1010815 | Resolved | Jul 1, 2025through Aug 29, 2025 |
| Interim Enhanced Surface Water Treatment Rule | OK1010815 | Resolved | Jun 1, 2025through Jun 30, 2025 |
| Long Term 2 Enhanced Surface Water Treatment RuleHealth-based | OK1010815 | Archived | Mar 1, 2025through Mar 31, 2025 |
| Lead and Copper Rule | OK1010815 | Resolved | Jan 1, 2025through Jul 29, 2025 |
| Long Term 2 Enhanced Surface Water Treatment RuleHealth-based | OK1010815 | Archived | Jan 1, 2025through Jan 31, 2025 |
| Surface Water Treatment RuleHealth-based | OK1010815 | Archived | Jan 1, 2025through Jan 31, 2025 |
| Surface Water Treatment RuleHealth-based | OK1010815 | Archived | Jan 1, 2025through Jan 31, 2025 |
| Long Term 2 Enhanced Surface Water Treatment RuleHealth-based | OK1010815 | Archived | Nov 1, 2024through Nov 30, 2024 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | OK1010815 | Resolved | Jul 1, 2024through Jul 31, 2024 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | OK1010815 | Resolved | Jun 1, 2024through Jun 30, 2024 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | OK1010815 | Resolved | Jun 1, 2024through Jun 30, 2024 |
| Surface Water Treatment RuleHealth-based | OK1010815 | Resolved | Jun 1, 2024through Jun 30, 2024 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | OK1010815 | Resolved | Apr 1, 2022through Apr 30, 2022 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | OK1010815 | Resolved | Mar 1, 2022through Mar 31, 2022 |
| Revised Total Coliform Rule | OK1010815 | Resolved | Nov 1, 2021through Nov 30, 2021 |
| Chlorine | OK1010815 | Resolved | Oct 1, 2021through Dec 31, 2021 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | OK1010815 | Resolved | Mar 1, 2021through Mar 31, 2021 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | OK1010815 | Resolved | Mar 1, 2021through Mar 31, 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 Tishomingo ZIP 73460 using 105.5 PPM nearby hardness and 1 reported measurement benchmarks.
No urgent match
Start with an independent water test
This profile does not trigger a treatment recommendation. Test at the tap before investing in equipment.
Affiliate 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 Tishomingo
Is tap water safe in Tishomingo?+
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 105.5 PPM, or 6.2 grains per gallon, classified as moderately hard. This is not a household tap measurement.
Do I need a water softener?+
There is no high-hardness trigger in this profile. Confirm with a tap test before buying equipment.