Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Eau Claire, WI 54701
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Eau Claire County.
Historical measurement record needs context
- Largest possible serving system
- Eau Claire Waterworks
- Source water
- Groundwater
- County
- Eau Claire 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
No active flag
0 active health-based records
Measurements by utility
Each result belongs to a specific system.
Utility match
8 systems
Serves 70,587 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.
Eau Claire Waterworks
WI6180230 · Groundwater · 70,587 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
- 0.002 mg/L
- Action level
- 0.015 mg/L
13% of the listed benchmark
Monitoring period: Jan 1, 2023 to Jun 30, 2023
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Villa Diann Mhp
WI6180290 · Groundwater · 420 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 (3)
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
- 0.0073 mg/L
- Action level
- 0.015 mg/L
49% of the listed benchmark
Monitoring period: Jun 1, 2025 to Sep 30, 2025
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 1.63 mg/L
- Action level
- 1.3 mg/L
125% of the listed benchmark
Monitoring period: Jul 1, 1993 to Dec 31, 1993
Combined Radium (-226 and -228)
EPA SDWIS reported health-based violation
- Reported level
- 7.985 PCI/L
- Maximum contaminant level
- 5 PCI/L
160% of the listed benchmark
Monitoring period: Jan 1, 2026 to Mar 31, 2026
Violation history (4)
| Rule | Status | Period |
|---|---|---|
| Combined Radium (-226 and -228)Health-based | Archived | Jan 1, 2026 to Mar 31, 2026 |
| Lead and Copper Rule | Resolved | Jun 1, 2024 to Aug 12, 2025 |
| Revised Total Coliform Rule | Resolved | Jul 1, 2022 to Jul 31, 2022 |
| Lead and Copper Rule | Resolved | Jan 1, 2022 to Jan 11, 2022 |
Pine Edge Mhp
WI6180291 · Groundwater · 300 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
- 0.0055 mg/L
- Action level
- 0.015 mg/L
37% of the listed benchmark
Monitoring period: Jun 1, 2024 to Sep 30, 2024
Violation history (1)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Resolved | Jan 1, 2022 to Jan 12, 2022 |
Priory The
WI6180281 · Groundwater · 185 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 (2)
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
- 3.5e-4 mg/L
- Action level
- 0.015 mg/L
2% of the listed benchmark
Monitoring period: Jun 1, 2024 to Sep 30, 2024
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 2.5 mg/L
- Action level
- 1.3 mg/L
192% of the listed benchmark
Monitoring period: Jun 1, 2017 to Sep 30, 2017
Violation history (5)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Resolved | Jan 1, 2025 to Jun 3, 2025 |
| Lead and Copper Rule | Resolved | Jan 1, 2022 to Jan 6, 2022 |
| Radium-228 | Resolved | Jan 1, 2021 to Dec 31, 2021 |
| Combined Radium (-226 and -228) | Resolved | Jan 1, 2021 to Dec 31, 2021 |
| Gross Alpha, Excl. Radon and U | Resolved | Jan 1, 2021 to Dec 31, 2021 |
Cozy Mhp Llc Front
WI6180286 · Groundwater · 111 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 (2)
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
- 0.0053 mg/L
- Action level
- 0.015 mg/L
35% of the listed benchmark
Monitoring period: Jul 1, 2025 to Dec 31, 2025
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 1.5 mg/L
- Action level
- 1.3 mg/L
115% of the listed benchmark
Monitoring period: Jul 1, 2025 to Dec 31, 2025
Violation history (2)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper RuleHealth-based | Resolved | Oct 1, 2024 to Jun 19, 2025 |
| Nitrate | Resolved | Jul 1, 2022 to Sep 30, 2022 |
Bonnie Vale Park 1
WI6180287 · Groundwater · 70 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
- 0.0028 mg/L
- Action level
- 0.015 mg/L
19% of the listed benchmark
Monitoring period: Jun 1, 2024 to Sep 30, 2024
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Bonnie Vale Park 2
WI6180300 · Groundwater · 51 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 (2)
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
- 0.0021 mg/L
- Action level
- 0.015 mg/L
14% of the listed benchmark
Monitoring period: Jun 1, 2024 to Sep 30, 2024
Copper (90th percentile)
EPA SDWIS Lead and Copper Rule samples
- Reported level
- 3.255 mg/L
- Action level
- 1.3 mg/L
250% of the listed benchmark
Monitoring period: Dec 31, 1993 to Jun 30, 1994
Violation history (2)
| Rule | Status | Period |
|---|---|---|
| Lead and Copper Rule | Resolved | Jun 1, 2021 to Nov 30, 2021 |
| Lead and Copper Rule | Resolved | Jun 1, 2021 to Nov 30, 2021 |
Cozy Mhp Llc Back
WI6180513 · Groundwater · 35 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
- 0.0076 mg/L
- Action level
- 0.015 mg/L
50% of the listed benchmark
Monitoring period: Jun 1, 2024 to Sep 30, 2024
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Hardness estimate unavailable
No responsible local estimate yet
We did not find enough qualifying recent USGS hardness observations within 25 miles of this ZIP centroid. We leave the value blank instead of substituting a state average. Ask the serving utility or test the household tap for a property-specific result.
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
A reported action-level record needs context. Check its monitoring period and the utility's current report.
Find an official utility report →Test for the decision you face
Ask the utility for hardness or test at the tap. For health concerns, use a certified laboratory and targeted analysis.
Convert your hardness test result →Nearby indexed reports
More local profiles in Eau Claire
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Eau Claire
Is tap water safe in Eau Claire?+
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?+
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.