City water profile

Water hardness in Elm Grove

Find official utility reports, understand hardness, and check the water system serving your home in Elm Grove, Wisconsin.

Utility-reported hardness

Not yet available

Check your provider and source →

State comparison: Unavailable
Evidence comparison rank: —
Matched utilities: 7
Active health records: 1

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 →

Convert a hardness result →Test your tap →

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.

Squires Grove

WI2680201 · Groundwater · 410 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

Below action level

Reported level: 0.0013 mg/L
Action level: 0.015 mg/L

8% of the listed benchmark

Monitoring period: Jun 1, 2024 to Sep 30, 2024

Violation history (3)

Imported violation history for Squires Grove
Rule	Status	Period
LEAD AND COPPER RULE REVISIONS	Resolved	Jul 2, 2025 to Nov 28, 2025
Lead and Copper Rule	Resolved	Jan 1, 2025 to Jan 2, 2025
LEAD AND COPPER RULE REVISIONS	Resolved	Oct 17, 2024 to Oct 18, 2024

Marian Heights Subdivision

WI2680203 · Groundwater · 400 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

Below action level

Reported level: 0.003 mg/L
Action level: 0.015 mg/L

20% of the listed benchmark

Monitoring period: Jun 1, 2023 to Sep 30, 2023

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Emerald Woods Condos

WI2685370 · Groundwater · 150 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

Below action level

Reported level: 0 mg/L
Action level: 0.015 mg/L

0% of the listed benchmark

Monitoring period: Jun 1, 2024 to Sep 30, 2024

Violation history (4)

Imported violation history for Emerald Woods Condos
Rule	Status	Period
LEAD AND COPPER RULE REVISIONSHealth-based	Resolved	Oct 17, 2024 to 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 Oct 17, 2024

Elm Grove Terrace

WI2680279 · Groundwater · 75 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

Below action level

Reported level: 3.9e-4 mg/L
Action level: 0.015 mg/L

3% of the listed benchmark

Monitoring period: Jun 1, 2024 to Sep 30, 2024

Copper (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Above action level

Reported level: 4.4 mg/L
Action level: 1.3 mg/L

338% of the listed benchmark

Monitoring period: Jun 1, 2015 to Sep 30, 2015

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Douglas Plaza South

WI2680862 · Groundwater · 62 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

Below action level

Reported level: 0.0029 mg/L
Action level: 0.015 mg/L

19% of the listed benchmark

Monitoring period: Jun 1, 2024 to Sep 30, 2024

Violation history (4)

Imported violation history for Douglas Plaza South
Rule	Status	Period
LEAD AND COPPER RULE REVISIONS	Unaddressed	Jul 2, 2025
Consumer Confidence Rule	Resolved	Jul 1, 2025 to Oct 2, 2025
Consumer Confidence Rule	Resolved	Jul 1, 2025 to Oct 2, 2025
Public Notice	Unaddressed	Jul 1, 2010

Carriage Hills Condominiums

WI2682406 · Groundwater · 50 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

1 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

Below action level

Reported level: 0.0013 mg/L
Action level: 0.015 mg/L

8% of the listed benchmark

Monitoring period: Jun 1, 2024 to Sep 30, 2024

Violation history (9)

Imported violation history for Carriage Hills Condominiums
Rule	Status	Period
Lead and Copper Rule	Resolved	Jan 1, 2025 to Dec 11, 2025
LEAD AND COPPER RULE REVISIONS	Resolved	Oct 17, 2024 to Feb 27, 2025
Public Notice	Unaddressed	Oct 17, 2024
Public Notice	Unaddressed	Oct 17, 2024
LEAD AND COPPER RULE REVISIONSHealth-based	Unaddressed	Oct 17, 2024
Groundwater RuleHealth-based	Resolved	Jul 2, 2023 to Aug 15, 2024
Public Notice	Resolved	Jul 2, 2023 to Sep 12, 2024
Consumer Confidence Rule	Resolved	Jul 1, 2021 to Dec 9, 2021
Consumer Confidence Rule	Resolved	Jul 1, 2021 to Dec 9, 2021

Douglas Plaza North

WI2680288 · Groundwater · 30 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

Below action level

Reported level: 0.0045 mg/L
Action level: 0.015 mg/L

30% of the listed benchmark

Monitoring period: Jun 1, 2024 to Sep 30, 2024

Violation history (5)

Imported violation history for Douglas Plaza North
Rule	Status	Period
LEAD AND COPPER RULE REVISIONS	Unaddressed	Jul 2, 2025
Consumer Confidence Rule	Resolved	Jul 1, 2025 to Oct 2, 2025
Consumer Confidence Rule	Resolved	Jul 1, 2025 to Oct 2, 2025
Lead and Copper Rule	Resolved	Jan 1, 2025 to Jan 2, 2025
Public Notice	Unaddressed	Jul 1, 2010

City summary

What the indexed records say

Elm Grove has 1 published ZIP profile across Waukesha County. The regional-evidence median is 518 PPM. The city does not meet the stricter comparison standard.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard1 ZIP

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 4.2 miles
Profiles with evidence: 1/1

Confidence labels

High: 1Moderate: 0Low: 0

Observation window: May 17, 2021 to Aug 5, 2024.

ZIP directory

Water reports in Elm Grove

Open a ZIP for site-level provenance and measurements.

ZIP code

53122

Very Hard

518 PPM

Nearest site: 4.2 mi
Confidence: High

View full ZIP evidence →

Practical next steps

Move from index to evidence

1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
3. Use a measured hardness result. Confirm health concerns or treatment sizing with the right method.

Continue comparing

Other Wisconsin communities

Brookfield

Waukesha County

518 PPM median

Butler

Waukesha County

244 PPM median

Delafield

Waukesha County

518 PPM median

Dousman

Waukesha County

529 PPM median

Eagle

Waukesha County

540 PPM median

Hartland

Waukesha County

518 PPM median

Search all 479 Wisconsin cities →

Questions people ask

About water in Elm Grove

Is the water hard?

Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.