Hardness
Moderately Hard
104.4 PPM · 6.1 GPG
Local water dashboard
Official source aggregationWater quality in Horseshoe Bay, TX 78657
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Llano County.
1 reported benchmark flag
- Primary matched system
- City Of Horseshoe Bay
- Source water
- Surface water
- County
- Llano 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
0.0041 mg/L
27% of action level
Utility match
1 system
Serves 12,729 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
104.4 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
104.4
mg/L as CaCO₃ equivalent
Grains per gallon
6.1
1 GPG ≈ 17.1 PPM
What this means at home
At 104.4 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
16
Nearest site
20.1 mi
Observation range
Jun 2, 2016–Jun 20, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: Lk Buchanan nr Council Ck nr Burnet, TX (Lake, Reservoir, Impoundment).USGS source documentation ↗
Regional context
Is 78657 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Horseshoe Bay median
104 PPM
About the same1 indexed ZIP readings · Range 104.4–104.4 PPM
Texas median
111 PPM
7 PPM lower1019 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)
0.0041 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 0.0041
EPA limit 0.015
TTHM
Measured in MG/L
Local 0.089
EPA limit 0.08
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 7
- Health-based
- 3
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Surface Water Treatment Rule | TX1500015 | Resolved | Oct 1, 2024through Oct 31, 2024 |
| Public Notice | TX1500015 | Resolved | Jul 16, 2024through Aug 26, 2024 |
| Long Term 2 Enhanced Surface Water Treatment RuleHealth-based | TX1500015 | Resolved | Jun 1, 2024through Jun 30, 2024 |
| Public Notice | TX1500015 | Resolved | Nov 1, 2021through Dec 1, 2021 |
| Public Notice | TX1500015 | Resolved | Oct 29, 2021through Nov 15, 2021 |
| TTHMHealth-basedReported 0.089 MG/L · MCL 0.08 | TX1500015 | Resolved | Jul 1, 2021through Sep 30, 2021 |
| TTHMHealth-basedReported 0.086 MG/L · MCL 0.08 | TX1500015 | Resolved | Jul 1, 2021through Sep 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 Horseshoe Bay ZIP 78657 using 104.4 PPM nearby hardness and 2 reported measurement benchmarks.
Drinking 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 Horseshoe Bay
Is tap water safe in Horseshoe Bay?+
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 104.4 PPM, or 6.1 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.