Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Delafield, WI 53018
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Waukesha County.
Historical measurement record needs context
- Largest possible serving system
- Delafield Square
- Source water
- Groundwater
- County
- Waukesha 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
10 systems
Serves 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.
Delafield Square
WI2685812 · Groundwater · 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
- 0.0012 mg/L
- Action level
- 0.015 mg/L
8% of the listed benchmark
Monitoring period: Jun 1, 2025 to Sep 30, 2025
Violation history (0)
No record returned in this imported window. This is not a guarantee of tap-water safety.
Nashotah House
WI2682512 · Groundwater · 350 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
- 0.0113 mg/L
- Action level
- 0.015 mg/L
76% 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, 2025 to Jan 2, 2025 |
St Johns Northwestern Academies
WI2680761 · Groundwater · 340 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
- 0.0088 mg/L
- Action level
- 0.015 mg/L
59% of the listed benchmark
Monitoring period: Jun 1, 2024 to Sep 30, 2024
Violation history (11)
| Rule | Status | Period |
|---|---|---|
| Public Notice | Unaddressed | Oct 17, 2024 |
| Public Notice | Unaddressed | Oct 17, 2024 |
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Mar 6, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Mar 6, 2025 |
| Chlorine | Resolved | Apr 1, 2022 to Jun 30, 2022 |
| Revised Total Coliform Rule | Resolved | Mar 1, 2022 to Mar 31, 2022 |
| Lead and Copper Rule | Resolved | Jan 1, 2022 to Feb 25, 2022 |
| Revised Total Coliform Rule | Resolved | Jan 1, 2022 to Jan 31, 2022 |
| Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-based | Resolved | Dec 2, 2021 to Feb 18, 2022 |
| Revised Total Coliform Rule | Resolved | Dec 1, 2021 to Dec 31, 2021 |
| Revised Total Coliform Rule | Resolved | Nov 1, 2021 to Nov 30, 2021 |
Delafield Waterworks
WI2684642 · 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
- 0.0019 mg/L
- Action level
- 0.015 mg/L
12% 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.
Arbors
WI2682795 · Groundwater · 280 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
- 1.5e-4 mg/L
- Action level
- 0.015 mg/L
1% of the listed benchmark
Monitoring period: Jun 1, 2024 to Sep 30, 2024
Violation history (4)
| Rule | Status | Period |
|---|---|---|
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Dec 9, 2024 |
| Public Notice | Unaddressed | Oct 17, 2024 |
| Public Notice | Unaddressed | Oct 17, 2024 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Dec 9, 2024 |
Lake Country Apartments
WI2682229 · Groundwater · 84 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 mg/L
- Action level
- 0.015 mg/L
0% of the listed benchmark
Monitoring period: Jun 1, 2024 to Sep 30, 2024
Violation history (2)
| Rule | Status | Period |
|---|---|---|
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Oct 29, 2024 |
| Public Notice | Unaddressed | Oct 17, 2024 |
Apartments Of Stoneridge
WI2682761 · 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 (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 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)
| Rule | Status | Period |
|---|---|---|
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Oct 24, 2024 |
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Oct 24, 2024 |
| Public Notice | Unaddressed | Oct 17, 2024 |
| Public Notice | Unaddressed | Oct 17, 2024 |
Knollcrest
WI2681104 · Groundwater · 66 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
- 0.0136 mg/L
- Action level
- 0.015 mg/L
91% of the listed benchmark
Monitoring period: Jun 1, 2023 to Sep 30, 2023
Di(2-ethylhexyl) phthalate
EPA SDWIS reported health-based violation
- Reported level
- 10.95 UG/L
- Maximum contaminant level
- 0.006 UG/L
182500% of the listed benchmark
Monitoring period: Aug 1, 2021 to Aug 31, 2021
Violation history (2)
| Rule | Status | Period |
|---|---|---|
| Di(2-ethylhexyl) phthalateHealth-based | Resolved | Aug 1, 2021 to Aug 31, 2021 |
| Lead and Copper Rule | Resolved | Jan 1, 2021 to Mar 1, 2021 |
Cambridge Place Of Delafield
WI2686325 · Groundwater · 50 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
- 2.0e-4 mg/L
- Action level
- 0.015 mg/L
1% of the listed benchmark
Monitoring period: Jun 1, 2025 to Sep 30, 2025
Violation history (4)
| Rule | Status | Period |
|---|---|---|
| LEAD AND COPPER RULE REVISIONSHealth-based | Resolved | Oct 17, 2024 to Jun 6, 2025 |
| Public Notice | Unaddressed | Oct 17, 2024 |
| Public Notice | Unaddressed | Oct 17, 2024 |
| LEAD AND COPPER RULE REVISIONS | Resolved | Oct 17, 2024 to Jun 6, 2025 |
Delafield Lakes 402
WI2686101 · Groundwater · 40 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
- 0.0032 mg/L
- Action level
- 0.015 mg/L
21% of the listed benchmark
Monitoring period: Jun 1, 2024 to Sep 30, 2024
Violation history (3)
| Rule | Status | Period |
|---|---|---|
| Di(2-ethylhexyl) phthalate | Resolved | Apr 1, 2023 to Jun 30, 2023 |
| Di(2-ethylhexyl) phthalate | Resolved | Jan 1, 2023 to Mar 31, 2023 |
| Lead and Copper Rule | Resolved | Jun 1, 2021 to Sep 22, 2022 |
Hardness meter
What does nearby environmental evidence show?
518
PPM as CaCO₃
Very Hard
PPM
518
GPG
30.3
Regional environmental evidence
USGS hardness classification scale
518 PPM
Soft
0–60Moderate
61–120Hard
121–180Very hard
181+
0–60Moderate
61–120Hard
121–180Very hard
181+
Parts per million
518
mg/L as CaCO₃ equivalent
Grains per gallon
30.3
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
9
Nearest site
5.7 mi
Observation range
May 17, 2021–Aug 5, 2024
Regional evidence confidence
High
Median of the latest source-type-aligned hardness observation at each monitoring site within 25 miles. Nearest monitoring location: 7N19E-29.5f (Well).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 53018 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Delafield median
518 PPM
About the same1 indexed ZIP readings · Range 518–518 PPM
Wisconsin median
278 PPM
240 PPM higher318 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
Use the current Consumer Confidence Report for treated-water results and official notices.
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 →Frequently asked
Water questions for Delafield
Is tap water safe in Delafield?+
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.