Hardness
Very Hard
296 PPM · 17.3 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 Garvin County.
At a glance
EPA quarter 2026Q2
Hardness
Very Hard
296 PPM · 17.3 GPG
Compliance screen
No active flag
0 active health-based records
Lead 90th percentile
0.0063 mg/L
42% of action level
Utility match
1 system
Serves 6,256 people system-wide
Hardness meter
Estimated local hardness
USGS hardness classification scale
296 PPM
Parts per million
296
mg/L as CaCO₃ equivalent
Grains per gallon
17.3
1 GPG ≈ 17.1 PPM
What this means at home
At 296 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
9
Nearest site
52 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
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Pauls Valley median
296 PPM
About the same1 indexed ZIP readings · Range 296–296 PPM
Oklahoma median
226 PPM
70 PPM higher148 indexed ZIP readings · Range 7–610 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)
0.0063 mg/L
Reported Dec 31, 2024
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 0.0063
EPA limit 0.015
100% line = listed limit
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Surface Water Treatment RuleHealth-based | OK1010808 | Resolved | May 1, 2025through May 31, 2025 |
| Surface Water Treatment RuleHealth-based | OK1010808 | Resolved | Apr 1, 2025through Apr 30, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | OK1010808 | Resolved | Oct 17, 2024through Jul 15, 2025 |
| LEAD AND COPPER RULE REVISIONS | OK1010808 | Resolved | Oct 17, 2024through Jul 15, 2025 |
| CARBON, TOTALHealth-basedReported 0.95 RATIO | OK1010808 | Resolved | Jan 1, 2024through Mar 31, 2024 |
| CARBON, TOTALHealth-basedReported 0.93 RATIO | OK1010808 | Resolved | Oct 1, 2023through Dec 31, 2023 |
| CARBON, TOTALHealth-basedReported 0.94 RATIO | OK1010808 | Resolved | Jul 1, 2023through Sep 30, 2023 |
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 Pauls Valley ZIP 73075 using 296 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
296 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 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 296 PPM, or 17.3 grains per gallon, classified as very hard. This is not a household tap measurement.
At 296 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.