Hardness
Soft
33.7 PPM · 2 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 Sebastian County.
At a glance
EPA quarter 2026Q2
Hardness
Soft
33.7 PPM · 2 GPG
Compliance screen
No active flag
0 active health-based records
Lead 90th percentile
0.002 mg/L
13% of action level
Utility match
1 system
Serves 2,367 people system-wide
Hardness meter
Estimated local hardness
USGS hardness classification scale
33.7 PPM
Parts per million
33.7
mg/L as CaCO₃ equivalent
Grains per gallon
2
1 GPG ≈ 17.1 PPM
What this means at home
At 33.7 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
21
Nearest site
9.2 mi
Observation range
Feb 11, 2016–Dec 5, 2024
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: Poteau River at Cauthron, AR (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.
Mansfield median
34 PPM
About the same1 indexed ZIP readings · Range 33.7–33.7 PPM
Arkansas median
71 PPM
37 PPM lower210 indexed ZIP readings · Range 4.8–283 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)
0.002 mg/L
Reported Dec 31, 2002
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 0.002
EPA limit 0.015
Measured in UG/L
Local 92
EPA limit 0.08
100% line = listed limit
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| TTHMHealth-basedReported 92 UG/L · MCL 0.08 | AR0000509 | Archived | Jul 1, 2023through Sep 30, 2023 |
| TTHMHealth-basedReported 91 UG/L · MCL 0.08 | AR0000509 | Archived | Apr 1, 2023through Jun 30, 2023 |
| TTHMHealth-basedReported 88 UG/L · MCL 0.08 | AR0000509 | Archived | Jan 1, 2023through Mar 31, 2023 |
| TTHMHealth-basedReported 85 UG/L · MCL 0.08 | AR0000509 | Archived | Oct 1, 2022through Dec 31, 2022 |
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 Mansfield ZIP 72944 using 33.7 PPM nearby hardness and 2 reported measurement benchmarks.
Drinking 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 33.7 PPM, or 2 grains per gallon, classified as soft. This is not a household tap measurement.
There is no high-hardness trigger in this profile. Confirm with a tap test before buying equipment.