Hardness
Very Hard
243 PPM · 14.2 GPG
Local water dashboard
Official source aggregationWater quality in Holton, KS 66436
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Jackson County.
No active health-based violation reported
- Primary matched system
- Jackson Co Rwd 3
- Source water
- Surface water
- County
- Jackson 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
0.0039 mg/L
26% of action level
Utility match
3 systems
Serves 4,376 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
243 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
243
mg/L as CaCO₃ equivalent
Grains per gallon
14.2
1 GPG ≈ 17.1 PPM
What this means at home
At 243 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
24
Nearest site
10.5 mi
Observation range
Jan 11, 2016–Jun 9, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: BIG ELM C NR MAYETTA, KS (Stream).USGS source documentation ↗
Regional context
Is 66436 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Holton median
243 PPM
About the same1 indexed ZIP readings · Range 243–243 PPM
Kansas median
289 PPM
46 PPM lower540 indexed ZIP readings · Range 72.2–707 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)
0.0039 mg/L
Reported Dec 31, 2023
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 0.0039
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 5
- Health-based
- 0
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Public Notice | KS2008510 | Resolved | Dec 30, 2022through Mar 13, 2023 |
| Public Notice | KS2008510 | Resolved | Dec 30, 2022through Mar 13, 2023 |
| Revised Total Coliform Rule | KS2008510 | Resolved | Nov 1, 2021through Nov 30, 2021 |
| Chlorine | KS2008510 | Resolved | Oct 1, 2021through Dec 13, 2021 |
| Surface Water Treatment Rule | KS2008514 | Resolved | Aug 1, 2021through Aug 31, 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
Your personalized water action plan
Matched to Holton ZIP 66436 using 243 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
243 PPM is 2× 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 Holton
Is tap water safe in Holton?+
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 243 PPM, or 14.2 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 243 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.