Hardness
Very Hard
428 PPM · 25 GPG
Local water dashboard
Official source aggregationWater quality in Seminole, TX 79360
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Gaines County.
1 reported benchmark flag
- Primary matched system
- City Of Seminole
- Source water
- Groundwater
- County
- Gaines 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
0.0018 mg/L
12% of action level
Utility match
1 system
Serves 7,386 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
428 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
428
mg/L as CaCO₃ equivalent
Grains per gallon
25
1 GPG ≈ 17.1 PPM
What this means at home
At 428 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
43
Nearest site
1.1 mi
Observation range
May 23, 2016–Sep 5, 2024
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: KD-27-19-4XX (Well).USGS source documentation ↗
Regional context
Is 79360 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Seminole median
428 PPM
About the same1 indexed ZIP readings · Range 428–428 PPM
Texas median
111 PPM
317 PPM higher1019 indexed ZIP readings · Range 5.4–500.5 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)
0.0018 mg/L
Reported Dec 31, 2026
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 0.0018
EPA limit 0.015
Arsenic
Measured in MG/L
Local 0.011
EPA limit 0.01
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 9
- Health-based
- 3
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Consumer Confidence Rule | TX0830012 | Unaddressed | Jul 1, 2025 |
| Lead and Copper Rule | TX0830012 | Resolved | Dec 30, 2024through Apr 14, 2025 |
| Consumer Confidence Rule | TX0830012 | Resolved | Jul 1, 2023through Oct 31, 2023 |
| Public Notice | TX0830012 | Unaddressed | Feb 1, 2023 |
| Revised Total Coliform Rule | TX0830012 | Resolved | Jan 1, 2022through Jan 31, 2022 |
| ArsenicHealth-basedReported 0.011 MG/L · MCL 0.01 | TX0830012 | Resolved | Jan 1, 2022through Mar 31, 2022 |
| Public Notice | TX0830012 | Resolved | Jul 29, 2021through Sep 17, 2021 |
| ArsenicHealth-basedReported 0.011 MG/L · MCL 0.01 | TX0830012 | Resolved | Apr 1, 2021through Jun 30, 2021 |
| ArsenicHealth-basedReported 0.011 MG/L · MCL 0.01 | TX0830012 | Resolved | Jan 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 Seminole ZIP 79360 using 428 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
428 PPM is 4× 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
Arsenic 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 Seminole
Is tap water safe in Seminole?+
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 428 PPM, or 25 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 428 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.