Hardness
Very Hard
417 PPM · 24.4 GPG
Local water dashboard
Official source aggregationWater quality in Muskego, WI 53150
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Waukesha County.
No active health-based violation reported
- Primary matched system
- Muskego Water Utility
- Source water
- Groundwater
- County
- Waukesha 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
0.0031 mg/L
21% of action level
Utility match
9 systems
Serves 8,150 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
417 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
417
mg/L as CaCO₃ equivalent
Grains per gallon
24.4
1 GPG ≈ 17.1 PPM
What this means at home
At 417 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
71
Nearest site
4.4 mi
Observation range
May 31, 2017–Aug 5, 2024
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 4N19E-1.7c (Well).USGS source documentation ↗
Regional context
Is 53150 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Muskego median
417 PPM
About the same1 indexed ZIP readings · Range 417–417 PPM
Wisconsin median
288 PPM
129 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)
0.0031 mg/L
Reported Sep 30, 2024
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 0.0031
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 18
- Health-based
- 3
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| LEAD AND COPPER RULE REVISIONS | WI2680212 | Resolved | Jul 2, 2025through Jul 2, 2025 |
| Consumer Confidence Rule | WI2680216 | Unaddressed | Jul 1, 2025 |
| Consumer Confidence Rule | WI2680216 | Unaddressed | Jul 1, 2025 |
| Lead and Copper Rule | WI2680212 | Resolved | Jan 1, 2025through Jan 16, 2025 |
| Public Notice | WI2681741 | Unaddressed | Oct 17, 2024 |
| LEAD AND COPPER RULE REVISIONSHealth-based | WI2681741 | Resolved | Oct 17, 2024through May 19, 2025 |
| LEAD AND COPPER RULE REVISIONS | WI2683555 | Resolved | Oct 17, 2024through Oct 9, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | WI2683555 | Resolved | Oct 17, 2024through Oct 9, 2025 |
| Public Notice | WI2683555 | Unaddressed | Oct 17, 2024 |
| Public Notice | WI2683555 | Unaddressed | Oct 17, 2024 |
| Groundwater RuleHealth-based | WI2683555 | Resolved | Jul 23, 2024through Sep 19, 2024 |
| Public Notice | WI2683555 | Resolved | Jul 23, 2024through Jan 23, 2025 |
| Consumer Confidence Rule | WI2680212 | Resolved | Jul 1, 2024through Jul 23, 2024 |
| Consumer Confidence Rule | WI2680212 | Resolved | Jul 1, 2024through Jul 14, 2024 |
| Lead and Copper Rule | WI2681741 | Resolved | Jan 1, 2024through Apr 16, 2024 |
| Public Notice | WI2681741 | Unaddressed | Jul 1, 2023 |
| Chlorine | WI2681741 | Resolved | Apr 1, 2023through Jun 30, 2023 |
| Consumer Confidence Rule | WI2680213 | Resolved | Jul 1, 2021through Jul 15, 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 Muskego ZIP 53150 using 417 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
417 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 Muskego
Is tap water safe in Muskego?+
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 417 PPM, or 24.4 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 417 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.