Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Superior, WI 54874
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Douglas County.
3 active health-based record(s) across possible systems
- Largest possible serving system
- Superior Water Light & Power Company
- Source water
- Surface water + Groundwater
- County
- Douglas County
- Profile updated
Your tap water
What does the utility report?
Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.
Utility hardness unavailable in this index
Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.
Find an official utility report →At a glance
What the current records say
EPA quarter 2026Q2
All possible systems
Review needed
3 active health-based records
Measurements by utility
Each result belongs to a specific system.
Utility match
2 systems
Serves 26,084 people system-wide
Match the name on your water bill
Your utility’s measurements and compliance records
These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.
EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.
Superior Water Light & Power Company
WI8160147 · Surface water · 26,084 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
No active health-based record in this imported snapshot
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 0.0056 mg/L
- Action level
- 0.015 mg/L
37% of the listed benchmark
Monitoring period: Jun 1, 2023 to Sep 30, 2023
Violation history (2)
| Rule | Status | Period |
|---|---|---|
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Mar 24, 2025 |
| Public Notice | Unaddressed | Oct 17, 2024 |
Manitou Falls Sanitary District No 1
WI8160145 · Groundwater · 95 people served system-wide
The system names this served city; Census place overlap links the city to this ZCTA.
3 reported active health-based record(s) for this system
Find this utility’s official report →Measurements (1)
An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.
Lead (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 0.0013 mg/L
- Action level
- 0.015 mg/L
9% of the listed benchmark
Monitoring period: Jan 1, 2023 to Jun 30, 2023
Violation history (70)
| Rule | Status | Period |
|---|---|---|
| Groundwater Rule | Unaddressed | Mar 21, 2026 |
| E. COLI | Unaddressed | Jan 14, 2026 |
| E. COLI | Unaddressed | Dec 24, 2025 |
| E. COLI | Unaddressed | Dec 10, 2025 |
| E. COLI | Unaddressed | Oct 15, 2025 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2025 |
| Lead and Copper Rule | Unaddressed | Jul 1, 2025 |
| Consumer Confidence Rule | Unaddressed | Jul 1, 2025 |
| Lead and Copper RuleHealth-based | Unaddressed | Mar 26, 2025 |
| Public Notice | Unaddressed | Mar 26, 2025 |
| Public Notice | Unaddressed | Mar 1, 2025 |
| Public Notice | Unaddressed | Feb 10, 2025 |
| Revised Total Coliform Rule | Resolved | Feb 10, 2025 to Feb 12, 2025 |
| Public Notice | Unaddressed | Feb 10, 2025 |
| Revised Total Coliform RuleHealth-based | Resolved | Feb 10, 2025 to Feb 12, 2025 |
| Public Notice | Unaddressed | Jan 16, 2025 |
| E. COLI | Unaddressed | Jan 16, 2025 |
| Nitrate | Archived | Jan 1, 2025 to Dec 31, 2025 |
| TTHM | Archived | Jan 1, 2025 to Dec 31, 2025 |
| Public Notice | Unaddressed | Jan 1, 2025 |
| Total Haloacetic Acids (HAA5) | Archived | Jan 1, 2025 to Dec 31, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Unaddressed | Oct 17, 2024 |
| Public Notice | Unaddressed | Oct 17, 2024 |
| Public Notice | Unaddressed | Oct 17, 2024 |
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Nov 5, 2024 |
| Public Notice | Unaddressed | Oct 1, 2024 |
| Public Notice | Unaddressed | Jul 1, 2024 |
| Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-based | Unaddressed | Jun 2, 2024 |
| Revised Total Coliform RuleHealth-based | Resolved | Dec 9, 2023 to Jun 20, 2024 |
| Public Notice | Resolved | Dec 9, 2023 to Sep 28, 2024 |
| Revised Total Coliform Rule | Resolved | Dec 9, 2023 to Jun 20, 2024 |
| E. COLI | Resolved | Nov 9, 2023 to Jun 25, 2024 |
| Lead and Copper Rule | Unaddressed | Oct 1, 2023 |
| Chlorine | Resolved | Oct 1, 2023 to Dec 31, 2023 |
| Public Notice | Resolved | Apr 1, 2023 to Sep 28, 2024 |
| CHLOROBENZENE | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| 1,2,4-Trichlorobenzene | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| cis-1,2-Dichloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Xylenes, Total | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| DICHLOROMETHANE | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| o-Dichlorobenzene | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| 1,2-Dichloroethane | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| 1,1,1-Trichloroethane | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| 1,1,2-Trichloroethane | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Benzene | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Total Haloacetic Acids (HAA5) | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Toluene | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Carbon tetrachloride | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Tetrachloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Public Notice | Resolved | Jan 1, 2023 to Sep 28, 2024 |
| Trichloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| 1,2-Dichloropropane | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| trans-1,2-Dichloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| p-Dichlorobenzene | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| 1,1-Dichloroethylene | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Styrene | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Lead and Copper Rule | Unaddressed | Jan 1, 2023 |
| Vinyl chloride | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Ethylbenzene | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| TTHM | Resolved | Jan 1, 2023 to Dec 31, 2023 |
| Public Notice | Resolved | Dec 1, 2022 to Jun 26, 2024 |
| Public Notice | Resolved | Dec 1, 2022 to Jun 26, 2024 |
| Lead and Copper RuleHealth-based | Resolved | Oct 1, 2022 to Jun 26, 2024 |
| Lead and Copper Rule | Resolved | Jul 1, 2022 to Feb 12, 2023 |
| Lead and Copper Rule | Resolved | Jun 1, 2022 to Nov 30, 2022 |
| Lead and Copper Rule | Resolved | Jun 1, 2022 to Nov 30, 2022 |
| Chlorine | Resolved | Oct 1, 2021 to Dec 31, 2021 |
| Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-based | Resolved | Jun 2, 2021 to Sep 22, 2021 |
| Total Haloacetic Acids (HAA5) | Resolved | Jan 1, 2021 to Dec 31, 2021 |
| TTHM | Resolved | Jan 1, 2021 to Dec 31, 2021 |
Hardness meter
What does nearby environmental evidence show?
84.3
PPM as CaCO₃
Moderately Hard
PPM
84.3
GPG
4.9
Regional environmental evidence
USGS hardness classification scale
84.3 PPM
Soft
0–60Moderate
61–120Hard
121–180Very hard
181+
0–60Moderate
61–120Hard
121–180Very hard
181+
Parts per million
84.3
mg/L as CaCO₃ equivalent
Grains per gallon
4.9
1 GPG ≈ 17.1 PPM
How to use regional evidence
These samples describe nearby environmental water. They cannot establish whether your tap water is soft or hard. Use a utility result or a tap test for appliance settings and treatment sizing.
USGS sites used
7
Nearest site
13.2 mi
Observation range
Aug 30, 2016–Mar 9, 2017
Regional evidence confidence
Low
Median of the latest source-type-aligned hardness observation at each monitoring site within 25 miles. Nearest monitoring location: St. Louis R at Pokegama Bay nr Superior, WI (Lake, Reservoir, Impoundment).USGS source documentation ↗Evidence tier: Regional environmental evidence. This value is not used as proof of the serving utility's treated-water hardness.
Regional context
Is 54874 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Superior median
84 PPM
About the same2 indexed ZIP readings · Range 84.3–84.3 PPM
Wisconsin median
278 PPM
194 PPM lower318 indexed ZIP readings · Range 69–824 PPM
Evidence-first next steps
Confirm the problem before choosing treatment
This profile can help you ask the right question. It cannot select equipment for a property without a current result from the serving utility or the tap.
Confirm the serving system
ZIP boundaries and utility service areas do not perfectly match. Verify the system on a water bill before relying on system-wide records.
Read the current utility report
An active health-based record is present. Follow the utility's current notice and public-health instructions.
Find an official utility report →Test for the decision you face
Use a tap hardness test before sizing a softener. For health concerns, use a certified laboratory and the correct sampling protocol.
Convert your hardness test result →Nearby indexed reports
More local profiles in Superior
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Superior
Is tap water safe in Superior?+
EPA ECHO reports 3 active health-based violations among the associated community water systems. Review the affected utility's current notice and Consumer Confidence Report.
How hard is the water?+
Utility-reported hardness is unavailable in this index. Regional samples do not establish tap-water hardness. Ask your provider or test your tap.
Do I need a water softener?+
Confirm hardness at your tap and consider actual scale or spotting before choosing treatment. Regional environmental values cannot determine whether you need a softener. A softener addresses hardness, not every contaminant.