Hardness
Hard
153.4 PPM · 9 GPG
Local water dashboard
Official source aggregationA source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Milam County.
At a glance
EPA quarter 2026Q2
Hardness
Hard
153.4 PPM · 9 GPG
Compliance screen
No active flag
0 active health-based records
Lead 90th percentile
0 mg/L
0% of action level
Utility match
1 system
Serves 5,489 people system-wide
Hardness meter
Estimated local hardness
USGS hardness classification scale
153.4 PPM
Parts per million
153.4
mg/L as CaCO₃ equivalent
Grains per gallon
9
1 GPG ≈ 17.1 PPM
What this means at home
At 153.4 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
6
Nearest site
42.1 mi
Observation range
Sep 21, 2016–Jul 16, 2025
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: Lk Somerville nr Ripple Ck Ramp nr Somerville, TX (Lake, Reservoir, Impoundment).USGS source documentation ↗
Regional context
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Cameron median
153 PPM
About the same1 indexed ZIP readings · Range 153.4–153.4 PPM
Texas median
111 PPM
42 PPM higher1019 indexed ZIP readings · Range 5.4–500.5 PPM
EPA benchmark screen
Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.
Lead (PB90)
0 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.
Measured in mg/L
Local 0
EPA limit 0.015
Measured in MG/L
Local 0.083
EPA limit 0.08
100% line = listed limit
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Public Notice | TX1660001 | Unaddressed | Apr 16, 2026 |
| Lead and Copper Rule | TX1660001 | Unaddressed | Dec 30, 2025 |
| Public Notice | TX1660001 | Resolved | Jul 6, 2025through Aug 25, 2025 |
| LEAD AND COPPER RULE REVISIONS | TX1660001 | Unaddressed | Jul 2, 2025 |
| Public Notice | TX1660001 | Unaddressed | May 15, 2025 |
| TTHMHealth-basedReported 0.083 MG/L · MCL 0.08 | TX1660001 | Resolved | Apr 1, 2025through Jun 30, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | TX1660001 | Resolved | Oct 17, 2024through Apr 22, 2025 |
| LEAD AND COPPER RULE REVISIONS | TX1660001 | Resolved | Oct 17, 2024through Apr 22, 2025 |
| Public Notice | TX1660001 | Unaddressed | Oct 11, 2024 |
| Public Notice | TX1660001 | Resolved | Jun 14, 2024through Aug 12, 2024 |
| TTHMHealth-basedReported 0.083 MG/L · MCL 0.08 | TX1660001 | Resolved | Apr 1, 2024through Jun 30, 2024 |
| TTHMHealth-basedReported 0.09 MG/L · MCL 0.08 | TX1660001 | Resolved | Jan 1, 2024through Mar 31, 2024 |
| Public Notice | TX1660001 | Resolved | Dec 13, 2023through Feb 2, 2024 |
| TTHMHealth-basedReported 0.097 MG/L · MCL 0.08 | TX1660001 | Resolved | Oct 1, 2023through Dec 31, 2023 |
| TTHM | TX1660001 | Resolved | Sep 26, 2023through Mar 11, 2024 |
| Public Notice | TX1660001 | Resolved | Jul 20, 2023through Sep 11, 2023 |
| TTHM | TX1660001 | Resolved | Jul 13, 2023through Mar 11, 2024 |
| TTHMHealth-basedReported 0.093 MG/L · MCL 0.08 | TX1660001 | Resolved | Jul 1, 2023through Sep 30, 2023 |
| TTHM | TX1660001 | Resolved | Apr 21, 2023through May 18, 2023 |
| TTHMHealth-basedReported 0.09 MG/L · MCL 0.08 | TX1660001 | 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
Matched to Cameron ZIP 76520 using 153.4 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
153.4 PPM is 1× 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
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
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.
Nearby USGS observations produce an estimate of 153.4 PPM, or 9 grains per gallon, classified as hard. This is not a household tap measurement.
At 153.4 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.