Hardness
Very Hard
224 PPM · 13.1 GPG
Local water dashboard
Official source aggregationWater quality in Dublin, TX 76446
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Erath County.
1 reported benchmark flag
- Primary matched system
- City Of Dublin
- Source water
- Surface water
- County
- Erath 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
1 system
Serves 3,388 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
224 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
224
mg/L as CaCO₃ equivalent
Grains per gallon
13.1
1 GPG ≈ 17.1 PPM
What this means at home
At 224 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
17
Nearest site
15.7 mi
Observation range
Feb 3, 2016–May 29, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: NRCS Upper Bosque Rv Site No 4 nr Stephenville, TX (Lake, Reservoir, Impoundment).USGS source documentation ↗
Regional context
Is 76446 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Dublin median
224 PPM
About the same1 indexed ZIP readings · Range 224–224 PPM
Texas median
111 PPM
113 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)
0.004 mg/L
Reported Dec 31, 2023
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 0.004
EPA limit 0.015
TTHM
Measured in MG/L
Local 0.098
EPA limit 0.08
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 16
- Health-based
- 7
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Consumer Confidence Rule | TX0720001 | Unaddressed | Jul 1, 2025 |
| Public Notice | TX0720001 | Resolved | Jun 30, 2025through Oct 9, 2025 |
| LEAD AND COPPER RULE REVISIONS | TX0720001 | Resolved | Oct 17, 2024through Nov 20, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | TX0720001 | Resolved | Oct 17, 2024through Nov 20, 2025 |
| Public Notice | TX0720001 | Resolved | Sep 19, 2024through Nov 1, 2024 |
| TTHMHealth-basedReported 0.098 MG/L · MCL 0.08 | TX0720001 | Resolved | Jul 1, 2024through Sep 30, 2024 |
| TTHM | TX0720001 | Resolved | May 22, 2024through Jul 9, 2024 |
| TTHM | TX0720001 | Resolved | Apr 3, 2024through Jul 9, 2024 |
| TTHMHealth-basedReported 0.108 MG/L · MCL 0.08 | TX0720001 | Resolved | Apr 1, 2024through Jun 30, 2024 |
| TTHMHealth-basedReported 0.101 MG/L · MCL 0.08 | TX0720001 | Resolved | Jan 1, 2024through Mar 31, 2024 |
| TTHMHealth-basedReported 0.101 MG/L · MCL 0.08 | TX0720001 | Resolved | Oct 1, 2023through Dec 31, 2023 |
| TTHM | TX0720001 | Resolved | Aug 9, 2023through Sep 20, 2023 |
| TTHMHealth-basedReported 0.095 MG/L · MCL 0.08 | TX0720001 | Resolved | Jul 1, 2023through Sep 30, 2023 |
| Public Notice | TX0720001 | Resolved | Jun 26, 2023through Sep 14, 2023 |
| TTHM | TX0720001 | Resolved | May 9, 2023through Sep 20, 2023 |
| TTHMHealth-basedReported 0.083 MG/L · MCL 0.08 | TX0720001 | Resolved | Apr 1, 2023through Jun 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
Your personalized water action plan
Matched to Dublin ZIP 76446 using 224 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
224 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 Dublin
Is tap water safe in Dublin?+
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 224 PPM, or 13.1 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 224 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.