Hardness
Hard
164.5 PPM · 9.6 GPG
Local water dashboard
Official source aggregationWater quality in Marion, IL 62959
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Williamson County.
No active health-based violation reported
- Primary matched system
- Marion
- Source water
- Surface water
- County
- Williamson 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
0.0012 mg/L
8% of action level
Utility match
4 systems
Serves 16,855 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
164.5 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
164.5
mg/L as CaCO₃ equivalent
Grains per gallon
9.6
1 GPG ≈ 17.1 PPM
What this means at home
At 164.5 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
6
Nearest site
37.6 mi
Observation range
Jan 4, 2016–May 28, 2026
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: OHIO RIVER AT OLMSTED, IL (Stream).USGS source documentation ↗
Regional context
Is 62959 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Marion median
165 PPM
About the same1 indexed ZIP readings · Range 164.5–164.5 PPM
Illinois median
285 PPM
120 PPM lower1065 indexed ZIP readings · Range 115–408 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)
0.0012 mg/L
Reported Dec 31, 2027
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 0.0012
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 22
- Health-based
- 2
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Public Notice | IL1995247 | Unaddressed | Jul 12, 2025 |
| Public Notice | IL1995247 | Unaddressed | Jul 12, 2025 |
| TTHM | IL1995247 | Archived | Jul 1, 2025through Sep 30, 2025 |
| Total Haloacetic Acids (HAA5) | IL1995247 | Archived | Jul 1, 2025through Sep 30, 2025 |
| Consumer Confidence Rule | IL1995247 | Unaddressed | Jul 1, 2025 |
| Public Notice | IL1995247 | Unaddressed | Apr 12, 2025 |
| Public Notice | IL1995247 | Unaddressed | Apr 12, 2025 |
| TTHM | IL1995247 | Archived | Apr 1, 2025through Jun 30, 2025 |
| Total Haloacetic Acids (HAA5) | IL1995247 | Archived | Apr 1, 2025through Jun 30, 2025 |
| Public Notice | IL1995247 | Unaddressed | Jan 12, 2025 |
| Public Notice | IL1995247 | Unaddressed | Jan 12, 2025 |
| TTHM | IL1995247 | Archived | Jan 1, 2025through Mar 31, 2025 |
| Total Haloacetic Acids (HAA5) | IL1995247 | Archived | Jan 1, 2025through Mar 31, 2025 |
| CARBON, TOTALHealth-basedReported 0.77 RATIO | IL1995200 | Resolved | Jul 1, 2024through Sep 30, 2024 |
| Consumer Confidence Rule | IL1995247 | Unaddressed | Jul 1, 2024 |
| CARBON, TOTALHealth-basedReported 0.8 RATIO | IL1995200 | Resolved | Apr 1, 2024through Jun 30, 2024 |
| Total Haloacetic Acids (HAA5) | IL1995247 | Resolved | Apr 1, 2024through Jun 30, 2024 |
| TTHM | IL1995247 | Resolved | Apr 1, 2024through Jun 30, 2024 |
| TTHM | IL1995247 | Resolved | Jan 1, 2024through Mar 31, 2024 |
| Total Haloacetic Acids (HAA5) | IL1995247 | Resolved | Jan 1, 2024through Mar 31, 2024 |
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 Marion ZIP 62959 using 164.5 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
164.5 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 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 Marion
Is tap water safe in Marion?+
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 164.5 PPM, or 9.6 grains per gallon, classified as hard. This is not a household tap measurement.
Do I need a water softener?+
At 164.5 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.