Hardness
Very Hard
272.5 PPM · 15.9 GPG
Local water dashboard
Official source aggregationWater quality in Three Rivers, TX 78071
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Live Oak County.
No active health-based violation reported
- Primary matched system
- City Of Three Rivers
- Source water
- Surface water
- County
- Live Oak 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 4,428 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
272.5 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
272.5
mg/L as CaCO₃ equivalent
Grains per gallon
15.9
1 GPG ≈ 17.1 PPM
What this means at home
At 272.5 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
10
Nearest site
54.7 mi
Observation range
Sep 20, 2016–Aug 26, 2024
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: Victor Braunig Lk at park ramp nr Elmendorf, TX (Lake, Reservoir, Impoundment).USGS source documentation ↗
Regional context
Is 78071 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Three Rivers median
273 PPM
About the same1 indexed ZIP readings · Range 272.5–272.5 PPM
Texas median
111 PPM
162 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 pass
Lead (PB90)
0.0018 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.
Lead (90th percentile)
Measured in mg/L
Local 0.0018
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 12
- Health-based
- 0
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | TX1490002 | Archived | Oct 1, 2025through Oct 31, 2025 |
| Surface Water Treatment Rule | TX1490002 | Archived | Oct 1, 2025through Oct 31, 2025 |
| Public Notice | TX1490002 | Resolved | Aug 25, 2025through Dec 19, 2025 |
| Interim Enhanced Surface Water Treatment Rule | TX1490002 | Resolved | Aug 1, 2025through Aug 31, 2025 |
| LEAD AND COPPER RULE REVISIONS | TX1490002 | Resolved | Jul 2, 2025through Apr 20, 2026 |
| Interim Enhanced Surface Water Treatment Rule | TX1490002 | Resolved | Jun 1, 2024through Jun 30, 2024 |
| Consumer Confidence Rule | TX1490002 | Resolved | Jul 1, 2023through Aug 27, 2024 |
| Lead and Copper Rule | TX1490002 | Resolved | Dec 30, 2021through Jan 14, 2026 |
| Revised Total Coliform Rule | TX1490002 | Resolved | Jul 1, 2021through Jul 31, 2021 |
| Public Notice | TX1490002 | Resolved | Mar 20, 2021through Sep 10, 2024 |
| Public Notice | TX1490002 | Resolved | Mar 20, 2021through Jan 14, 2026 |
| Surface Water Treatment Rule | TX1490002 | Resolved | Feb 1, 2021through Feb 28, 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 Three Rivers ZIP 78071 using 272.5 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
272.5 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
Water questions for Three Rivers
Is tap water safe in Three Rivers?+
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 272.5 PPM, or 15.9 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 272.5 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.