Hardness
Very Hard
400 PPM · 23.4 GPG
Local water dashboard
Official source aggregationWater quality in Edgerton, WI 53534
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Rock County.
No active health-based violation reported
- Primary matched system
- Edgerton Waterworks
- Source water
- Groundwater
- County
- Rock 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
0.0028 mg/L
18% of action level
Utility match
5 systems
Serves 5,512 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
400 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
400
mg/L as CaCO₃ equivalent
Grains per gallon
23.4
1 GPG ≈ 17.1 PPM
What this means at home
At 400 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
79
Nearest site
36.2 mi
Observation range
Aug 3, 2016–Aug 19, 2024
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 46N5E-21.1d1 (1-CHE-S) (Well).USGS source documentation ↗
Regional context
Is 53534 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Edgerton median
400 PPM
About the same1 indexed ZIP readings · Range 400–400 PPM
Wisconsin median
288 PPM
112 PPM higher556 indexed ZIP readings · Range 41.3–467 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)
0.0028 mg/L
Reported Sep 30, 2025
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 0.0028
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 14
- Health-based
- 4
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-based | WI1541223 | Resolved | Jan 2, 2026through Jan 7, 2026 |
| LEAD AND COPPER RULE REVISIONS | WI1540167 | Resolved | Jul 2, 2025through Oct 22, 2025 |
| Lead and Copper Rule | WI1540118 | Resolved | Jan 1, 2025through Feb 2, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | WI1540119 | Resolved | Oct 17, 2024through Mar 28, 2025 |
| Public Notice | WI1540119 | Unaddressed | Oct 17, 2024 |
| LEAD AND COPPER RULE REVISIONS | WI1541223 | Resolved | Oct 17, 2024through Jun 2, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | WI1541223 | Resolved | Oct 17, 2024through Jun 2, 2025 |
| Public Notice | WI1541223 | Unaddressed | Oct 17, 2024 |
| Public Notice | WI1541223 | Unaddressed | Oct 17, 2024 |
| Public Notice | WI1541223 | Unaddressed | Oct 17, 2024 |
| Consumer Confidence Rule | WI1540167 | Resolved | Jul 1, 2023through Jul 27, 2023 |
| Consumer Confidence Rule | WI1540167 | Resolved | Jul 1, 2023through Jul 27, 2023 |
| Public Notice | WI1540118 | Resolved | Dec 6, 2022through Jun 26, 2023 |
| Revised Total Coliform RuleHealth-based | WI1540118 | Resolved | Dec 6, 2022through Dec 7, 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
Your personalized water action plan
Matched to Edgerton ZIP 53534 using 400 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
400 PPM is 3× 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 Edgerton
Is tap water safe in Edgerton?+
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 400 PPM, or 23.4 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 400 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.