Mequon Water Quality
Wisconsin
According to EPA SDWIS, Mequon, Wisconsin is served by 25 community water systems covering about 16,344 people. The same extract lists 9 health-based violation records, most recently coded 5200 in 2024. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Mequon, Wisconsin is delivered through 25 EPA-regulated community water systems serving an estimated 16,344 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 9 violation records across the 25 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 3 distinct EPA contaminant codes: LEAD AND COPPER RULE REVISIONS, Groundwater Rule, Stage 1 Disinfectants and Disinfection Byproducts Rule. 3 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Wisconsin drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| MEQUON WATER UTILITY | 11,152 | 0 | Clean |
| CONCORDIA UNIVERSITY | 1,500 | 0 | Clean |
| MEQUON TRAIL TOWNHOMES | 615 | 1 | Health |
| HUNTINGTON PARK | 600 | 0 | Clean |
| WESTCHESTER LAKES SUBDIVISION | 300 | 0 | Clean |
| PARK PLACE SUBDIVISION | 260 | 0 | Clean |
| BRIGHTON RIDGE SUBDIVISION | 200 | 0 | Clean |
| HADDONSTONE SUBDIVISION | 195 | 0 | Clean |
| COUNTRY TERRACE CONDO HOMES | 160 | 0 | Clean |
| VINTAGE ESTATES | 130 | 1 | Health |
| KENILWORTH SUBD | 120 | 0 | Clean |
| MEQUON ON THE SQUARE CONDOMINIUM OWNERS ASSOCIATION INC | 110 | 0 | Clean |
| RAVINE FARMS HM OWNERS ASSOC | 100 | 0 | Clean |
| RIVER LAKE SUBDIVISION | 100 | 0 | Clean |
| WYNGATE SUBDIVISION | 100 | 0 | Clean |
| WOODRIDGE ESTATES | 100 | 0 | Clean |
| HIGHLAND COLONY ESTATES CONDO | 88 | 0 | Clean |
| RIVER TRAILS ESTATES WATER USERS | 84 | 1 | Health |
| LAKE COUNTRY APARTMENTS | 84 | 0 | Clean |
| WILLOW GLEN APARTMENTS | 80 | 4 | Health |
| MEQUON COLONY ESTATES | 75 | 0 | Clean |
| ELM GROVE TERRACE | 75 | 1 | Health |
| MEQUON PARC APARTMENTS LLC | 60 | 0 | Clean |
| VILLAGE GLEN APTS | 30 | 0 | Clean |
| MEQUON WATER TRUST | 26 | 1 | Health |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| WILLOW GLEN APARTMENTS | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| MEQUON TRAIL TOWNHOMES | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| VINTAGE ESTATES | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| RIVER TRAILS ESTATES WATER USERS | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| MEQUON WATER TRUST | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| WILLOW GLEN APARTMENTS | Groundwater Rule | 2024-07-23 |
| WILLOW GLEN APARTMENTS | Groundwater Rule | 2024-07-23 |
| WILLOW GLEN APARTMENTS | Groundwater Rule | 2024-07-23 |
| ELM GROVE TERRACE | Stage 1 Disinfectants and Disinfection Byproducts Rule | 2014-01-02 |
What are Mequon's health-based records for?
Mequon's health-based violation records carry 3 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Lead and Copper Rule Revisions | 5 | 5 |
| Groundwater Rule | 3 | 1 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 1 | 1 |
TRI Facilities in Mequon
| Facility | Total Releases |
|---|---|
| Super Steel LLC | 74 lbs |
| Jbt Corp | 20 lbs |
| Rockwell Automation Inc | 3 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Mequon, Wisconsin? ▼
How many water violations does Mequon have in this EPA extract? ▼
What contaminants were found in Mequon water? ▼
How many water systems serve Mequon? ▼
Where does Mequon get its drinking water? ▼
Are there pollution sources near Mequon? ▼
How does Mequon compare in Wisconsin?
Of the 492 Wisconsin places with at least one community water system on file, Mequon ranks #1 by number of systems (25).
Either side of it: Milwaukee (20), Stevens Point (18)
About This Data
Figures here are the current EPA SDWIS extract joined to the 25 community water systems whose service area lists Mequon, ranked against the 492 Wisconsin places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.