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Public water system record

Ridgeway Waterworks

Serves Ridgeway, Iowa County, WI · 690 people served

Federal records show 2 health-based violations and 2 monitoring/reporting issues for Ridgeway Waterworks 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.

  • WI1250087
  • RIDGEWAY
  • WI
  • 690 served

System profile

Source water Groundwater
ZIP 53582
EPA system ID WI1250087

Verify this system on EPA ECHO →

Health-based violations, last 10 years
2
Resolved
0
Unresolved
0
Archived by EPA
2
Any acute record
No
Monitoring issues, last 10 years
2

Key facts

  • Ridgeway Waterworks draws water from 2 wells (1 of them for emergency, seasonal or other part-time use).
  • Highest measured level in the last 10 years: Combined Radium (-226 and -228), 5.66 pCi/L, federal limit 5 pCi/L (1.1 times the limit), 2024.
  • Record on file since 1994, with 4 health-based violations before October 19, 2016.
  • Lead pipe inventory: 1 lead and 72 unknown out of 318 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 5.66 pCi/L, federal limit 5 pCi/L (1.1 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 5.5 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
Revised Total Coliform Rule
Monitoring violation
 Aug 1, 2025 Resolved
Nitrate
Monitoring and reporting
 Jan 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.

Full record since 1994

EPA's records for Ridgeway Waterworks go back to 1994. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 51 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 3 1
2000s 1 48
2010 to October 18, 2016 0 2
2020s 2 2

Most recent health-based violation before October 19, 2016: Total Coliform, began September 2005, Resolved.

Show all 4 health-based violations before October 19, 2016
Contaminant Start date Status
Total Coliform
Contaminant limit exceeded
 Sep 1, 2005 Resolved
Total Coliform
Contaminant limit exceeded
 Aug 1, 1996 Resolved
Total Coliform
Contaminant limit exceeded
 Jun 1, 1995 Resolved
Total Coliform
Contaminant limit exceeded
 Dec 1, 1994 Resolved

What the violations mean

Combined Radium (-226 and -228)

2 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

Ridgeway Waterworks draws water from 2 wells (1 of them for emergency, seasonal or other part-time use).

Annual water quality report

Ridgeway Waterworks 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