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Public water system record

Randolph Water Dept

Serves Randolph, Columbia County and Dodge County, WI · 1,800 people served

Federal records show 5 health-based violations and 5 monitoring/reporting issues for Randolph Water Dept in the last ten years. The most serious issue in this window was a Combined Radium (-226 and -228) violation that EPA lists as archived, not resolved.

  • WI1110125
  • RANDOLPH
  • WI
  • 1,800 served

System profile

Source water Groundwater
ZIP 53956
EPA system ID WI1110125

Verify this system on EPA ECHO →

Health-based violations, last 10 years
5
Resolved
0
Unresolved
0
Archived by EPA
5
Any acute record
No
Monitoring issues, last 10 years
5

Key facts

  • Randolph Water Dept draws water from 2 wells.
  • Highest measured level in the last 10 years: Combined Radium (-226 and -228), 7.66 pCi/L, federal limit 5 pCi/L (1.5 times the limit), 2024.
  • Most recent formal enforcement: compliance order (no penalty) by Wisconsin, December 2025.
  • Record on file since 1995, with 2 health-based violations before October 19, 2016.
  • Lead pipe inventory: 4 lead and 1 unknown out of 707 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.935 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Apr 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.1575 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Jan 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.73 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
 340 Oct 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 7.66 pCi/L, federal limit 5 pCi/L (1.5 times the limit)
 340 Jul 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.54 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
 340 Apr 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Lead and Copper Rule
Monitoring and reporting
 Jan 1, 2024 Resolved
Revised Total Coliform Rule
Monitoring violation
 May 1, 2023 Resolved
Revised Total Coliform Rule
Monitoring violation
 Jun 1, 2019 Resolved
Revised Total Coliform Rule
Monitoring violation
 Feb 1, 2017 Resolved
Lead and Copper Rule
Monitoring and reporting
 Jan 1, 2012 Active

Full record since 1995

EPA's records for Randolph Water Dept go back to 1995. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 52 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 1 47
2000s 0 3
2010 to October 18, 2016 1 2
October 19, 2016 to 2019 0 2
2020s 5 2

Most recent health-based violation before October 19, 2016: Arsenic, began July 2012, Resolved.

Show all 2 health-based violations before October 19, 2016
Contaminant Start date Status
Arsenic
Contaminant limit exceeded
Measured 0.0109 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
 Jul 1, 2012 Resolved
Total Coliform
Contaminant limit exceeded
 Oct 1, 1999 Resolved

Enforcement actions

Wisconsin regulators took 1 formal enforcement action against Randolph Water Dept in 2025, filed as 5 records in EPA's data. The most recent was a compliance order (no penalty) in December 2025.

Date By Action Violations covered
Dec 11, 2025 Wisconsin Compliance order (no penalty) 5 violations (5 health-based): Combined Radium (-226 and -228)

What the violations mean

Combined Radium (-226 and -228)

5 incidents

Test results for Combined Radium (-226 and -228) were above the federal limit (a maximum contaminant level violation).

The utility had to notify customers about each of these violations.

Where the water comes from

Randolph Water Dept draws water from 2 wells.

Annual water quality report

Randolph Water Dept must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Wisconsin.

Certified drinking water labs by state EPA guidance for private wells