Hardness
Hard
161 PPM · 9.4 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 Mercer County.
At a glance
EPA quarter 2026Q2
Hardness
Hard
161 PPM · 9.4 GPG
Compliance screen
No active flag
0 active health-based records
Lead 90th percentile
0.0043 mg/L
29% of action level
Utility match
1 system
Serves 5,633 people system-wide
Hardness meter
Estimated local hardness
USGS hardness classification scale
161 PPM
Parts per million
161
mg/L as CaCO₃ equivalent
Grains per gallon
9.4
1 GPG ≈ 17.1 PPM
What this means at home
At 161 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
14
Nearest site
27.2 mi
Observation range
Aug 30, 2016–Oct 28, 2024
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: HARMON BRANCH NEAR MOUTH AT THORPE, WV (Stream).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.
Athens median
161 PPM
About the same1 indexed ZIP readings · Range 161–161 PPM
West Virginia median
141 PPM
20 PPM higher219 indexed ZIP readings · Range 85.5–265 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)
0.0043 mg/L
Reported Dec 31, 2024
Copper (CU90)
27.6 mg/L
Reported Dec 31, 2015
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Measured in mg/L
Local 0.0043
EPA limit 0.015
Measured in mg/L
Local 27.6
EPA limit 1.3
100% line = listed limit
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Nitrate | WV3302801 | Archived | Jan 1, 2025through Dec 31, 2025 |
| Total Haloacetic Acids (HAA5) | WV3302801 | Resolved | Apr 1, 2021through Jun 30, 2021 |
| TTHM | WV3302801 | Resolved | Apr 1, 2021through Jun 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
Matched to Athens ZIP 24712 using 161 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
161 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
Copper (90th percentile) 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 161 PPM, or 9.4 grains per gallon, classified as hard. This is not a household tap measurement.
At 161 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.