Hardness
Hard
169.5 PPM · 9.9 GPG
Local water dashboard
Official source aggregationWater quality in Mansfield, OH 44906
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Richland County.
1 reported benchmark flag
- Primary matched system
- Mansfield City
- Source water
- Surface water
- County
- Richland 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
0.002 mg/L
13% of action level
Utility match
1 system
Serves 51,000 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
169.5 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
169.5
mg/L as CaCO₃ equivalent
Grains per gallon
9.9
1 GPG ≈ 17.1 PPM
What this means at home
At 169.5 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
16
Nearest site
37.1 mi
Observation range
Mar 15, 2016–Dec 4, 2024
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: Huron River at Milan OH (Stream).USGS source documentation ↗
Regional context
Is 44906 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Mansfield median
170 PPM
About the same6 indexed ZIP readings · Range 158–175 PPM
Ohio median
226 PPM
56 PPM lower162 indexed ZIP readings · Range 77.2–387 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 pass1 fail
Lead (PB90)
0.002 mg/L
Reported Dec 31, 2025
Copper (CU90)
430 mg/L
Reported Sep 30, 2004
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.002
EPA limit 0.015
Copper (90th percentile)
Measured in mg/L
Local 430
EPA limit 1.3
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 8
- Health-based
- 5
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Long Term 2 Enhanced Surface Water Treatment RuleHealth-based | OH7002914 | Resolved | Dec 1, 2025through Dec 31, 2025 |
| LEAD AND COPPER RULE REVISIONS | OH7002914 | Resolved | Jul 2, 2025through Dec 31, 2025 |
| Long Term 2 Enhanced Surface Water Treatment RuleHealth-based | OH7002914 | Resolved | May 1, 2025through May 9, 2025 |
| Interim Enhanced Surface Water Treatment RuleHealth-based | OH7002914 | Resolved | Jan 1, 2025through Jan 31, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | OH7002914 | Resolved | Oct 17, 2024through Jul 7, 2025 |
| LEAD AND COPPER RULE REVISIONS | OH7002914 | Resolved | Oct 17, 2024through Jul 7, 2025 |
| Public Notice | OH7002914 | Unaddressed | Aug 21, 2023 |
| Lead and Copper RuleHealth-based | OH7002914 | Resolved | Jan 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
Your personalized water action plan
Matched to Mansfield ZIP 44906 using 169.5 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
169.5 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
Under-Sink Reverse Osmosis System
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.
Nearby indexed reports
Compare ZIPs in Mansfield
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Mansfield
Is tap water safe in Mansfield?+
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 169.5 PPM, or 9.9 grains per gallon, classified as hard. This is not a household tap measurement.
Do I need a water softener?+
At 169.5 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.