Hardness
Moderately Hard
88.7 PPM · 5.2 GPG
Local water dashboard
Official source aggregationWater quality in Lago Vista, TX 78645
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Travis County.
No active health-based violation reported
- Primary matched system
- City Of Lago Vista
- Source water
- Surface water
- County
- Travis 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
0.0019 mg/L
12% of action level
Utility match
1 system
Serves 8,698 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
88.7 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
88.7
mg/L as CaCO₃ equivalent
Grains per gallon
5.2
1 GPG ≈ 17.1 PPM
What this means at home
At 88.7 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
15
Nearest site
14.3 mi
Observation range
Sep 22, 2016–Jun 15, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: Barton Ck at Lost Ck Blvd nr Austin, TX (Stream).USGS source documentation ↗
Regional context
Is 78645 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Lago Vista median
89 PPM
About the same1 indexed ZIP readings · Range 88.7–88.7 PPM
Texas median
111 PPM
22 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 pass
Lead (PB90)
0.0019 mg/L
Reported Dec 31, 2025
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.
Lead (90th percentile)
Measured in mg/L
Local 0.0019
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 16
- Health-based
- 3
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Public Notice | TX2270092 | Unaddressed | Apr 2, 2026 |
| Lead and Copper Rule | TX2270092 | Resolved | Dec 30, 2025through Mar 11, 2026 |
| Public Notice | TX2270092 | Resolved | Oct 1, 2025through Dec 16, 2025 |
| Public Notice | TX2270092 | Resolved | Aug 31, 2025through Mar 11, 2026 |
| Interim Enhanced Surface Water Treatment Rule | TX2270092 | Resolved | Aug 1, 2025through Aug 31, 2025 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | TX2270092 | Resolved | Aug 1, 2025through Aug 31, 2025 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | TX2270092 | Resolved | Jul 1, 2025through Jul 31, 2025 |
| Interim Enhanced Surface Water Treatment Rule | TX2270092 | Resolved | Jul 1, 2025through Jul 31, 2025 |
| Interim Enhanced Surface Water Treatment Rule | TX2270092 | Resolved | Jul 1, 2025through Jul 31, 2025 |
| Consumer Confidence Rule | TX2270092 | Resolved | Jul 1, 2025through Mar 16, 2026 |
| Public Notice | TX2270092 | Unaddressed | May 1, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | TX2270092 | Resolved | Oct 17, 2024through Feb 5, 2026 |
| LEAD AND COPPER RULE REVISIONS | TX2270092 | Resolved | Oct 17, 2024through Feb 5, 2026 |
| Consumer Confidence Rule | TX2270092 | Resolved | Jul 1, 2023through Nov 16, 2023 |
| Public Notice | TX2270092 | Resolved | Mar 19, 2021through Jun 9, 2021 |
| Public Notice | TX2270092 | Resolved | Mar 18, 2021through Jun 9, 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 Lago Vista ZIP 78645 using 88.7 PPM nearby hardness and 1 reported measurement benchmarks.
No urgent match
Start with an independent water test
This profile does not trigger a treatment recommendation. Test at the tap before investing in equipment.
Affiliate 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 Lago Vista
Is tap water safe in Lago Vista?+
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 88.7 PPM, or 5.2 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.