What is the Munimetric score for Wisconsin?

Munimetric assigns a state-level average MISI score based on the individual scores of all covered community water systems in Wisconsin. The state average, band distribution, and market-level rankings are shown on this page. Higher MISI values indicate greater structural stress.

Which water systems in Wisconsin face the most infrastructure stress?

The state page ranks the highest-stress systems in Wisconsin by MISI score. Stress reflects operational burden, capital gaps, revenue fragility, rate affordability constraints, and governance risk, not a single compliance event. The headline remains a blended structural stress composite rather than a pure physical-condition index. Workflow actions remain reserved for account access.

How does Wisconsin compare to other states for drinking water infrastructure risk?

Wisconsin is compared against all 50 states and territories using average MISI score, market count, and band distribution. Munimetric tracks nationwide coverage across 9,000+ scored service markets.

Are there lead pipe or corrosion-related concerns in Wisconsin water systems?

Where lead and copper rule compliance data is available from EPA SDWA records, Munimetric factors it into the Operational Stress family score. Specific lead service line inventories vary by system. Individual system profiles contain the most detailed compliance context available.

Does Munimetric include PFAS monitoring context for Wisconsin water systems?

Munimetric summarizes stored PFAS monitoring context where public contaminant-monitoring records are available. Missing PFAS summaries remain missing records, not non-detections, and this public-record layer does not change the MISI score by itself.

What compliance signals are active in Wisconsin?

Munimetric tracks signals such as compliance escalation, monitoring and reporting failures, population decline, income erosion, data staleness, and parent-government fiscal stress across Wisconsin water systems.

Does Munimetric track boil water advisories in Wisconsin?

Munimetric does not track real-time boil water advisories. For current advisories, contact your local water utility or state drinking water program. Munimetric monitors structural conditions that provide context around system reliability over time.

How many covered systems in Wisconsin have recent recorded drinking-water violations?

Stored public records show 97 covered systems with recent drinking-water violations, with 749 recorded violations across 195 covered systems in the recent 3 years window.

How does Munimetric summarize PFAS public-record context in Wisconsin?

Stored contaminant-monitoring summaries are present for 177 covered systems; 68 systems have PFAS detection context in this state summary.

How does Munimetric summarize lead & copper context in Wisconsin?

Stored lead & copper summaries are present for 182 covered systems; 124 systems have violation or action-level context in this state summary.

What source-water types are represented across covered Wisconsin systems?

Stored identity records group covered Wisconsin systems by source-water type: Surface water: 45, Groundwater: 150.

Where can I find official drinking-water records for Wisconsin?

The Official records drawer lists Public drinking-water profile, Contaminant monitoring records links where currently available for Wisconsin.

Is this a real-time statewide tap-water condition rating?

No. This is not a real-time tap-water condition determination. Munimetric summarizes stored public-record context for research and navigation, and this layer does not change MISI.

States / Wisconsin

Wisconsin

Name: Wisconsin Drinking Water Infrastructure Stress Data
Creator: Munimetric
License: https://munimetric.com/terms

Explore Wisconsin drinking-water system scores, stress signals, infrastructure risk, and statewide market context across 195 scored service markets serving approximately 3.8 million people. This state profile highlights what is happening and why it matters using water-system, fiscal, capital, and signal context.

Wisconsin has an average MISI infrastructure stress score of 23.1/100 in the Watch band as of 2026-07-11. Public records summarize recent drinking-water violations, PFAS monitoring records, lead and copper context, and source-water mix across 195 covered systems. Updated May 2026.

National context

States sized by scored-market count. Color reflects average stress band.

195Markets scored

23.1Headline composite

~3.8MPop. served

831Active signals

Band distribution (MISI)

State headline composite

Component of current headline composite

Infrastructure Stress19.3 / 100

Physical, compliance, and capital-execution pressure reflected in the blended headline composite.

Socioeconomic Stress3.7 / 100

Affordability, demand-base, and parent-government fiscal pressure reflected in the blended headline composite.

Observability Stress0.1 / 100

Staleness, disclosure freshness, and reporting-visibility effects reflected in the blended headline composite.

23.1 headline compositeWisconsin state composite195 markets~3.8M people served

State interpretation guide

How to read Wisconsin headline composite

Plain-language summary

Wisconsin currently shows an average MISI headline composite of 23.1 versus a national average of 24.5. In v0.1.2, the headline composite remains a blended structural stress measure rather than a pure physical-condition index. A frozen national reference and a 50 percent single-factor cap reduce the dominance of near-universal and very rare factors, while the component bars continue to separate infrastructure, socioeconomic, and observability readings.

Why this page stands out

195 scored systems are included in this state view, with explicit confidence and source-backed context.
State posture is benchmarked against national averages, not evaluated in isolation.
Top system links below connect state-level findings directly to profile-level diagnostics.

What to do next

Review the executive context to understand the state-level pressure pattern.
Open top system profiles to inspect what is actually driving stress at market level.
Use saved monitoring after research access is enabled to follow high-stress systems over time.

Priority Wisconsin paths

Public record layer

Statewide Water Quality Context

Stored public-record context for recent drinking-water violations, contaminant monitoring, and source-water mix across covered systems. This is not a tap-water safety determination and does not change the MISI score.

Systems with recent violations

97 of 195Systems with recent public violation rows.

Source-water mix195 systems

Surface water45
Groundwater150
Purchased water0
Mixed source0
Not stored0

Latest identity snapshot: Dec 31, 2025

Coverage

Violation, enforcement, and compliance-burden counts use the recent 3 years window for dated stored records.
Drinking-water identity snapshots are stored for 183 of 195 included scored systems.
PFAS monitoring summary records are stored for 177 of 195 included systems; missing records are not treated as non-detections.
Lead and copper summary records are stored for 182 of 195 included systems; missing records are not treated as absence of lead/copper context.

Water quality questionsDefinitions and public-record context

How many covered systems in Wisconsin have recent recorded drinking-water violations?: Stored public records show 97 covered systems with recent drinking-water violations, with 749 recorded violations across 195 covered systems in the recent 3 years window.
How does Munimetric summarize PFAS public-record context in Wisconsin?: Stored contaminant-monitoring summaries are present for 177 covered systems; 68 systems have PFAS detection context in this state summary.
How does Munimetric summarize lead & copper context in Wisconsin?: Stored lead & copper summaries are present for 182 covered systems; 124 systems have violation or action-level context in this state summary.
What source-water types are represented across covered Wisconsin systems?: Stored identity records group covered Wisconsin systems by source-water type: Surface water: 45, Groundwater: 150.
Where can I find official drinking-water records for Wisconsin?: The Official records drawer lists Public drinking-water profile, Contaminant monitoring records links where currently available for Wisconsin.
Is this a real-time statewide tap-water condition rating?: No. This is not a real-time tap-water condition determination. Munimetric summarizes stored public-record context for research and navigation, and this layer does not change MISI.

Official records

Public drinking-water profileEPA ECHO: Federal drinking-water dashboard and public-record search entry point.
Contaminant monitoring recordsEPA UCMR: Federal contaminant-monitoring program reference and public data entry point.

Methodology/source notes

Methodology/source notesDisplayed from stored public drinking-water records and official program references. This layer does not change MISI.
Enforcement historyEPA ECHO / SDWIS: Violation and enforcement counts are aggregated from stored public compliance records across covered systems.
Contaminant monitoring recordsEPA UCMR: PFAS context uses stored contaminant-monitoring summaries where available; missing records are not treated as non-detections.
State drinking-water programOfficial link not currently stored for this state program mapping.

Top recent compliance-burden systemsRecent 3 years

System	Population	Source water	Recent violations	Recent enforcement	Public-record flags
West Bend WaterworksWI2670120	31,752	Groundwater	124	32	recent violations recorded, recent enforcement history, recent monitoring/reporting failures, PFAS detections in stored records, lead/copper context
Middleton WaterworksWI1130242	23,868	Groundwater	60	12	recent violations recorded, recent enforcement history, recent monitoring/reporting failures, lead/copper context
Pewaukee Village WaterworksWI2680229	8,166	Groundwater	51	136	recent violations recorded, recent enforcement history, lead/copper context
Waukesha Water UtilityWI2680238	70,718	Surface water	34	1,438	recent violations recorded, recent enforcement history
Pewaukee City Water And Sewer UtilityWI2680214	8,671	Groundwater	30	126	recent violations recorded, recent enforcement history, PFAS detections in stored records
Ashland Water UtilityWI8020373	8,000	Surface water	24	84	recent violations recorded, recent enforcement history, recent monitoring/reporting failures, lead/copper context
Bloomfield, Village OfWI2651469	4,071	Groundwater	24	78	recent violations recorded, recent enforcement history, recent monitoring/reporting failures
Lake Hallie Waterworks Village OfWI6090849	6,701	Groundwater	16	22	recent violations recorded, recent enforcement history, recent monitoring/reporting failures, lead/copper context

This is not a real-time tap-water condition determination. For current advisories or health guidance, consult the utility or state drinking-water program.

Executive context

What This Page Shows

195 of the community drinking-water systems in Wisconsin are currently scored. Analytics below are calculated from this covered subset only. Covered systems serve approximately 3.8M people.

What the Data Suggests

Wisconsin has 195 scored service markets in the Munimetric coverage set, covering roughly 3.8 million residents in total. At the latest reading, the state-level average lands at 23.1 out of 100, indicating early but meaningful signs of structural stress in aggregate. A relatively small share — roughly 4% — currently sit in elevated-stress bands.

Across state markets, Operational Stress stands out as the dominant contributor to headline stress (11.2 points average), with Capex Pressure a distant second at 8.1. That pattern suggests a particular kind of pressure — concentrated rather than broadly distributed.

831 active signals are recorded across state markets. The most prevalent is Climate Hazard Exposure, affecting 185 markets.

State-level average stress has been relatively steady between recent observation periods, suggesting the current picture reflects persistent conditions rather than a sudden shift.

This summary is based on structured, source-backed public data and is intended for research and monitoring only. It is not investment advice, a credit opinion, or municipal advisory guidance.

Recent Movement

Latest average MISI is 23.1 as of Jul 11, 2026. Movement since Jul 10, 2026 is flat.

Compact summary from 72 stored state observations.

State Family Contribution Summary

Operational Stress11.2 / 20.0

Capex Pressure8.1 / 20.0

Revenue Fragility3.1 / 20.0

Governance Risk0.6 / 20.0

Rate Constraint0.0 / 20.0

Signals

Signal Frequency

Signal	Severity	Markets affected	% of scored
Climate Hazard Exposure	high	185	95%
Compliance Escalation	high	134	69%
Lead & Copper Rule Risk	high	124	64%
High-AGI Out-Migration	high	109	56%
Current Drought Severity	medium	84	43%
PFAS Contamination Risk	high	68	35%
Parent-Government Fiscal Stress	medium	37	19%
Infrastructure Capital Gap	high	36	18%
Housing Market Weakness	medium	26	13%
Population Served Decline	medium	16	8%
Monitoring / Reporting Failures	medium	7	4%
Utility Data Staleness	high	3	2%
Income Erosion	low	2	1%

Markets

Top Markets

#	Market	Score	Band	Population	Signals
1	Milwaukee Waterworks	49.2	Fragile	626K	8
2	Oak Creek Waterworks	47.2	Fragile	32K	8
3	Milwaukee County Grounds	46.4	Fragile	10K	8
4	Whitefish Bay Waterworks	44.1	Fragile	14K	7
5	North Shore Water Commission	43.4	Fragile	36K	8
6	Cudahy Waterworks	40.9	Fragile	19K	7
7	Wauwatosa Waterworks	40.9	Fragile	49K	7
8	South Milwaukee Waterworks	39.9	Watch	21K	7
9	Rice Lake Waterworks	39.3	Watch	9K	7
10	Madison Water Utility	39.1	Watch	272K	7
11	Mt Horeb Waterworks	38.0	Watch	8K	6
12	Verona Waterworks	38.0	Watch	14K	6
13	West Bend Waterworks	37.6	Watch	32K	6
14	Oconomowoc Waterworks	37.3	Watch	16K	6
15	North Fond Du Lac Waterworks	37.2	Watch	5K	6
16	Racine Waterworks	36.5	Watch	105K	4
17	Greendale Waterworks	36.0	Watch	14K	7
18	Oregon Waterworks	35.7	Watch	11K	6
19	New Richmond Waterworks	35.6	Watch	11K	5
20	Brookfield Water Utility	35.3	Watch	29K	6

Comparison

State Comparison

National average: 24.5

Rank	State	Avg Score	Band	Markets	Delta vs State
28	Texas	23.9	Watch	987	+0.8
29	South Dakota	23.9	Watch	45	+0.8
30	Wisconsin	23.1	Watch	195	+0.0
31	Iowa	22.9	Watch	131	-0.2
32	Arkansas	22.7	Watch	158	-0.5

Analytical posture

State Stress Analytics

Score Distribution

Distribution of scored market scores with the state average overlay.

195 markets plotted.

Stress vs Population

Each point is a scored market; tooltip reveals market-level context.

195 markets plotted.

Population View

People served by community water systems in Wisconsin, colored by stress band.

~3.8M people served by 195 systems in Wisconsin

Stable

Watch

Fragile

High Stress

Critical

195 scored systems · colored by stress band

Peer Constellation

Select a market to see its nearest peers by score similarity.

Center market:

24 nearest peers by score distance.

Score Trend

Latest

23.1

Trend

+14.1

Observations

Extended layers

Advanced State Context

Priority views, detailed registers, and methodology supporting the analytical core above.

Markets & signals

Priority Views

#	Market	Score	Band	Population	Signals
1	Milwaukee Waterworks	49.2	Fragile	626K	8
2	Oak Creek Waterworks	47.2	Fragile	32K	8
3	Milwaukee County Grounds	46.4	Fragile	10K	8
4	Whitefish Bay Waterworks	44.1	Fragile	14K	7
5	North Shore Water Commission	43.4	Fragile	36K	8
6	Cudahy Waterworks	40.9	Fragile	19K	7
7	Wauwatosa Waterworks	40.9	Fragile	49K	7
8	South Milwaukee Waterworks	39.9	Watch	21K	7
9	Rice Lake Waterworks	39.3	Watch	9K	7
10	Madison Water Utility	39.1	Watch	272K	7
11	Mt Horeb Waterworks	38.0	Watch	8K	6
12	Verona Waterworks	38.0	Watch	14K	6
13	West Bend Waterworks	37.6	Watch	32K	6
14	Oconomowoc Waterworks	37.3	Watch	16K	6
15	North Fond Du Lac Waterworks	37.2	Watch	5K	6
16	Racine Waterworks	36.5	Watch	105K	4
17	Greendale Waterworks	36.0	Watch	14K	7
18	Oregon Waterworks	35.7	Watch	11K	6
19	New Richmond Waterworks	35.6	Watch	11K	5
20	Brookfield Water Utility	35.3	Watch	29K	6

Detailed records

Registers

#	Market	Score	Band	Population	Signals
1	Milwaukee Waterworks	49.2	Fragile	626K	8
2	Oak Creek Waterworks	47.2	Fragile	32K	8
3	Milwaukee County Grounds	46.4	Fragile	10K	8
4	Whitefish Bay Waterworks	44.1	Fragile	14K	7
5	North Shore Water Commission	43.4	Fragile	36K	8
6	Cudahy Waterworks	40.9	Fragile	19K	7
7	Wauwatosa Waterworks	40.9	Fragile	49K	7
8	South Milwaukee Waterworks	39.9	Watch	21K	7
9	Rice Lake Waterworks	39.3	Watch	9K	7
10	Madison Water Utility	39.1	Watch	272K	7
11	Mt Horeb Waterworks	38.0	Watch	8K	6
12	Verona Waterworks	38.0	Watch	14K	6
13	West Bend Waterworks	37.6	Watch	32K	6
14	Oconomowoc Waterworks	37.3	Watch	16K	6
15	North Fond Du Lac Waterworks	37.2	Watch	5K	6
16	Racine Waterworks	36.5	Watch	105K	4
17	Greendale Waterworks	36.0	Watch	14K	7
18	Oregon Waterworks	35.7	Watch	11K	6
19	New Richmond Waterworks	35.6	Watch	11K	5
20	Brookfield Water Utility	35.3	Watch	29K	6

Munimetric tracks infrastructure stress across 195 community drinking-water systems in Wisconsin, covering compliance conditions, capital needs, revenue and rate pressure, and governance risk. Use this page to research which systems face the highest structural stress and how Wisconsin compares nationally.

Which water systems in Wisconsin face the most infrastructure stress?: The highest-stress systems in Wisconsin are ranked by MISI score above. Stress reflects operational burden, capital gaps, revenue fragility, rate affordability constraints, and governance risk—not a single compliance event. In v0.1.2, the headline composite remains a blended structural stress measure rather than a pure physical-condition index. A frozen national reference and a 50 percent single-factor cap reduce the dominance of near-universal and very rare factors, while the component bars continue to separate infrastructure, socioeconomic, and observability readings.
How does Wisconsin compare to other states for drinking water infrastructure risk?: Wisconsin is compared against all 50 states and territories using average MISI score, market count, and band distribution. The state comparison table above shows where Wisconsin ranks nationally and how its average score compares.
Are there lead pipe or corrosion-related concerns in Wisconsin water systems?: Where lead and copper rule compliance data is available from EPA SDWA records, Munimetric factors it into the Operational Stress family. Specific lead service line inventories vary by system. Individual system profiles contain the most detailed compliance context available.
What compliance signals are active in Wisconsin?: Munimetric tracks signals such as compliance escalation, monitoring and reporting failures, data staleness, and financial stress indicators across Wisconsin systems. The signal frequency table above summarizes which signals are most prevalent statewide.
Does Munimetric track boil water advisories in Wisconsin?: Munimetric does not track real-time boil water advisories. For current advisories, contact your local water utility or state drinking water program. Munimetric monitors structural conditions—compliance posture, infrastructure stress, and governance risk—that provide broader context around system reliability.

Keep monitoring this state

Research access covers saved monitoring, alerts, recurring briefs, and team review.

Get the Water Stress Brief Request research access

Water Infrastructure in Wisconsin

Munimetric tracks infrastructure stress across 195 community drinking-water systems in Wisconsin. Each system receives a Munimetric Infrastructure Stress Index (MISI) score from 0 to 100, calculated across five risk families: Operational Stress, Capex Pressure, Revenue Fragility, Rate Constraint, and Governance Risk. Higher scores indicate more structural stress. Scores are source-backed and deterministic, drawing from EPA SDWA compliance records, American Community Survey demographic and economic data, FEMA National Risk Index hazard profiles, and state financial disclosures.

State-level monitoring shows which systems face the highest structural stress, how Wisconsin compares against other states nationally, and which monitoring signals are most active across the state. Each individual system profile includes compliance history, score family drivers, peer rankings within population-based cohorts where safeguards pass, and public source context. Full provenance cards and source workbench views remain workflow-gated. Munimetric covers community water systems across all 50 states and territories. This is structural risk research—not a water quality rating, advisory feed, or credit rating. Updated May 2026.

The statewide public-record layer adds drinking-water violation categories, PFAS monitoring summaries where stored, lead and copper context, source-water mix, and official record links across covered systems. These records help explain water-system context alongside infrastructure stress without turning Munimetric into a tap-water safety determination.

What is the Munimetric score for Wisconsin?: Munimetric assigns a state-level average MISI score based on the individual scores of all covered community water systems in Wisconsin. The state average, band distribution, and market-level rankings are shown on this page. Higher MISI values indicate greater structural stress.
Which water systems in Wisconsin face the most infrastructure stress?: The state page ranks the highest-stress systems in Wisconsin by MISI score. Stress reflects operational burden, capital gaps, revenue fragility, rate affordability constraints, and governance risk, not a single compliance event. The headline remains a blended structural stress composite rather than a pure physical-condition index. Workflow actions remain reserved for account access.
How does Wisconsin compare to other states for drinking water infrastructure risk?: Wisconsin is compared against all 50 states and territories using average MISI score, market count, and band distribution. Munimetric tracks nationwide coverage across 9,000+ scored service markets.
Are there lead pipe or corrosion-related concerns in Wisconsin water systems?: Where lead and copper rule compliance data is available from EPA SDWA records, Munimetric factors it into the Operational Stress family score. Specific lead service line inventories vary by system. Individual system profiles contain the most detailed compliance context available.
Does Munimetric include PFAS monitoring context for Wisconsin water systems?: Munimetric summarizes stored PFAS monitoring context where public contaminant-monitoring records are available. Missing PFAS summaries remain missing records, not non-detections, and this public-record layer does not change the MISI score by itself.
What compliance signals are active in Wisconsin?: Munimetric tracks signals such as compliance escalation, monitoring and reporting failures, population decline, income erosion, data staleness, and parent-government fiscal stress across Wisconsin water systems.
Does Munimetric track boil water advisories in Wisconsin?: Munimetric does not track real-time boil water advisories. For current advisories, contact your local water utility or state drinking water program. Munimetric monitors structural conditions that provide context around system reliability over time.