Hardness
Very Hard
295 PPM · 17.3 GPG
Local water dashboard
Official source aggregationWater quality in Yale, OK 74085
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Payne County.
1 reported benchmark flag
- Primary matched system
- Yale
- Source water
- Surface water
- County
- Payne 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
0.0067 mg/L
45% of action level
Utility match
1 system
Serves 1,227 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
295 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
295
mg/L as CaCO₃ equivalent
Grains per gallon
17.3
1 GPG ≈ 17.1 PPM
What this means at home
At 295 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
4
Nearest site
49.8 mi
Observation range
Jan 5, 2016–May 14, 2026
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: North Canadian River near Harrah, OK (Stream).USGS source documentation ↗
Regional context
Is 74085 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Yale median
295 PPM
About the same1 indexed ZIP readings · Range 295–295 PPM
Oklahoma median
226 PPM
69 PPM higher148 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 pass1 fail
Lead (PB90)
0.0067 mg/L
Reported Dec 31, 2025
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.0067
EPA limit 0.015
TTHM
Measured in MG/L
Local 0.126
EPA limit 0.08
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 24
- Health-based
- 11
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Revised Total Coliform Rule | OK3006039 | Archived | Nov 1, 2025through Nov 30, 2025 |
| Chloramine | OK3006039 | Archived | Nov 1, 2025through Nov 30, 2025 |
| Revised Total Coliform Rule | OK3006039 | Archived | Jul 1, 2025through Jul 31, 2025 |
| Chloramine | OK3006039 | Archived | Jul 1, 2025through Jul 31, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | OK3006039 | Resolved | Oct 17, 2024through Sep 19, 2025 |
| LEAD AND COPPER RULE REVISIONS | OK3006039 | Resolved | Oct 17, 2024through Sep 19, 2025 |
| TTHM | OK3006039 | Resolved | Dec 30, 2022through Jun 26, 2025 |
| Consumer Confidence Rule | OK3006039 | Resolved | Oct 2, 2022through Sep 20, 2023 |
| TTHMHealth-basedReported 0.126 MG/L · MCL 0.08 | OK3006039 | Resolved | Jan 1, 2022through Mar 31, 2022 |
| TTHMHealth-basedReported 0.105 MG/L · MCL 0.08 | OK3006039 | Resolved | Jan 1, 2022through Mar 31, 2022 |
| TTHM | OK3006039 | Resolved | Dec 30, 2021through Apr 18, 2022 |
| TTHMHealth-basedReported 0.149 MG/L · MCL 0.08 | OK3006039 | Resolved | Oct 1, 2021through Dec 31, 2021 |
| TTHMHealth-basedReported 0.114 MG/L · MCL 0.08 | OK3006039 | Resolved | Oct 1, 2021through Dec 31, 2021 |
| Total Haloacetic Acids (HAA5) | OK3006039 | Resolved | Sep 29, 2021through Apr 18, 2022 |
| TTHM | OK3006039 | Resolved | Sep 29, 2021through Apr 18, 2022 |
| TTHMHealth-basedReported 0.116 MG/L · MCL 0.08 | OK3006039 | Archived | Jul 1, 2021through Sep 30, 2021 |
| TTHMHealth-basedReported 0.165 MG/L · MCL 0.08 | OK3006039 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| TTHM | OK3006039 | Resolved | Apr 1, 2021through May 5, 2021 |
| TTHMHealth-basedReported 0.108 MG/L · MCL 0.08 | OK3006039 | Resolved | Apr 1, 2021through Jun 30, 2021 |
| TTHMHealth-basedReported 0.169 MG/L · MCL 0.08 | OK3006039 | Resolved | Apr 1, 2021through Jun 30, 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 Yale ZIP 74085 using 295 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
295 PPM is 2× 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
TTHM has 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 Yale
Is tap water safe in Yale?+
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 295 PPM, or 17.3 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 295 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.