Hardness
Very Hard
417 PPM · 24.4 GPG
Local water dashboard
Official source aggregationWater quality in Pewaukee, WI 53072
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.
2 reported benchmark flags
- Primary matched system
- Pewaukee City Water And Sewer 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 mg/L
0% of action level
Utility match
4 systems
Serves 8,671 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
67
Nearest site
2.5 mi
Observation range
May 31, 2017–Aug 8, 2024
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 7N19E-29.5f (Well).USGS source documentation ↗
Regional context
Is 53072 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Pewaukee 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 pass2 fail
Lead (PB90)
0 mg/L
Reported Sep 30, 2024
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
3 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0
EPA limit 0.015
Gross Alpha, Excl. Radon and U
Measured in PCI/L
Local 16.95
EPA limit 15
Combined Radium (-226 and -228)
Measured in PCI/L
Local 5.55
EPA limit 5
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 55
- Health-based
- 32
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Gross Alpha, Excl. Radon and UHealth-basedReported 16.95 PCI/L · MCL 15 | WI2680214 | Archived | Jan 1, 2026through Mar 31, 2026 |
| Combined Radium (-226 and -228)Health-basedReported 5.55 PCI/L · MCL 5 | WI2680229 | Archived | Jan 1, 2026through Mar 31, 2026 |
| Public Notice | WI2680229 | Unaddressed | Nov 19, 2025 |
| Public Notice | WI2680229 | Unaddressed | Nov 19, 2025 |
| Gross Alpha, Excl. Radon and UHealth-basedReported 20.03 PCI/L · MCL 15 | WI2680214 | Archived | Oct 1, 2025through Dec 31, 2025 |
| Combined Radium (-226 and -228)Health-basedReported 6.46 PCI/L · MCL 5 | WI2680229 | Archived | Oct 1, 2025through Dec 31, 2025 |
| Public Notice | WI2680229 | Unaddressed | Sep 30, 2025 |
| Public Notice | WI2680214 | Resolved | Aug 18, 2025through Nov 20, 2025 |
| Gross Alpha, Excl. Radon and UHealth-basedReported 21.65 PCI/L · MCL 15 | WI2680214 | Archived | Jul 1, 2025through Sep 30, 2025 |
| Combined Radium (-226 and -228)Health-basedReported 6.76 PCI/L · MCL 5 | WI2680229 | Archived | Jul 1, 2025through Sep 30, 2025 |
| Gross Alpha, Excl. Radon and UHealth-basedReported 24.45 PCI/L · MCL 15 | WI2680214 | Archived | Apr 1, 2025through Jun 30, 2025 |
| Combined Radium (-226 and -228)Health-basedReported 8.28 PCI/L · MCL 5 | WI2680229 | Archived | Apr 1, 2025through Jun 30, 2025 |
| Gross Alpha, Excl. Radon and UHealth-basedReported 16.27 PCI/L · MCL 15 | WI2680229 | Archived | Apr 1, 2025through Jun 30, 2025 |
| Public Notice | WI2680214 | Resolved | Mar 3, 2025through Jun 23, 2025 |
| Public Notice | WI2680229 | Unaddressed | Mar 3, 2025 |
| Public Notice | WI2680229 | Unaddressed | Mar 3, 2025 |
| Public Notice | WI2680229 | Unaddressed | Feb 12, 2025 |
| Public Notice | WI2680229 | Unaddressed | Feb 12, 2025 |
| Gross Alpha, Excl. Radon and UHealth-basedReported 26.95 PCI/L · MCL 15 | WI2680214 | Archived | Jan 1, 2025through Mar 31, 2025 |
| Combined Radium (-226 and -228)Health-basedReported 8.02 PCI/L · MCL 5 | WI2680229 | Archived | Jan 1, 2025through Mar 31, 2025 |
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 Pewaukee ZIP 53072 using 417 PPM nearby hardness and 3 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 systemsDrinking water protection
Under-Sink Reverse Osmosis System
Gross Alpha, Excl. Radon and U, Combined Radium (-226 and -228) have 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.
Frequently asked
Water questions for Pewaukee
Is tap water safe in Pewaukee?+
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.