WI / Wisconsin Dells
WI · Tap water records
Wisconsin Dells tap water, in plain English
Here is what the EPA's own data shows about tap water in Wisconsin Dells. According to EPA SDWIS data retrieved June 2026, Wisconsin Dells is served by 3 active community water systems, together reported to serve about 225 people.
As of June 2026, EPA records show 98 violations across the community water system(s) serving Wisconsin Dells, going back to the earliest EPA record. 88 of these are classified by the EPA as health-based (a contaminant recorded above the limit the EPA tracks); the rest are monitoring or reporting violations. Each is listed by system below, with its status.
What the EPA has on record, by system
Dells Club Condo Assoc 1
75 served · groundwater · PWSID WI7010423 - Health-based Groundwater Rule: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded once in January 2021. The EPA record for these does not include a measured level. All have since returned to compliance, per EPA records.
Dells Club Condo Assoc 2
75 served · groundwater · PWSID WI7010424 - Monitoring LEAD AND COPPER RULE REVISIONS: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded once in July 2025. All have since returned to compliance, per EPA records.
Dells Club Condo Assoc 3
75 served · groundwater · PWSID WI7010425 - Health-based Combined Radium (-226 and -228): a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 53 times between October 2020 and July 2023. The EPA record lists a level of 7.35 PCI/L; the limit (MCL) is 5.5 PCI/L. EPA records do not show all of these as returned to compliance.
- Health-based Gross Beta Particle Activity: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 4 times in July 2023. The EPA record lists a level of 52.48 PCI/L; the limit (MCL) is 50.5 PCI/L. EPA records do not show all of these as returned to compliance.
- Health-based Radium-228: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 22 times between October 2020 and January 2022. The EPA record lists a level of 6.06 PCI/L; the limit (MCL) is 5.5 PCI/L. EPA records do not show all of these as returned to compliance.
- Health-based Gross Alpha, Excl. Radon and U: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 8 times between January 2021 and July 2021. The EPA record lists a level of 17.57 PCI/L; the limit (MCL) is 15.5 PCI/L. EPA records do not show all of these as returned to compliance.
- Monitoring Gross Alpha, Excl. Radon and U: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 3 times in October 2024. EPA records do not show all of these as returned to compliance.
- Monitoring CYANIDE: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 3 times in January 2024. EPA records do not show all of these as returned to compliance.
- Monitoring 2,3,7,8-TCDD: a monitoring or reporting violation (a required test or report was late or missed — not a measured exceedance), recorded 3 times in January 2024. EPA records do not show all of these as returned to compliance.
What this means
A health-based violation means a contaminant was recorded above the limit the EPA tracks for it. A monitoring or reporting violation means a required test or report was late or missed — not that a contaminant was measured above a limit. “Returned to compliance” means the EPA recorded the issue as resolved.
This page summarizes the EPA's own records and does not assess whether your water is safe to drink. For the most current details, you can verify every record directly with the EPA, and contact your water system with questions.
Source: U.S. EPA Envirofacts SDWIS, retrieved June 2026. Records cover the EPA's full reporting history for these systems. Verify at EPA ECHO.