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Public water system record

Winona

Serves Winona, Winona County, MN · 27,782 people served

Federal records show 8 health-based violations and no monitoring/reporting issues for Winona in the last ten years. The most serious issue in this window was a resolved Combined Radium (-226 and -228) violation.

  • MN1850013
  • WINONA
  • MN
  • 27,782 served

System profile

Source water Groundwater
ZIP 55987
EPA system ID MN1850013

Verify this system on EPA ECHO →

Health-based violations, last 10 years
8
Resolved
8
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
0

Key facts

  • Winona draws water from 8 wells.
  • Highest measured level in the last 10 years: Combined Radium (-226 and -228), 9.6 pCi/L, federal limit 5 pCi/L (1.9 times the limit), 2017.
  • Most recent formal enforcement: compliance order (no penalty) by Minnesota, November 2020.
  • Record on file since 1997, with 0 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 3 unknown out of 8,959 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 5.1 pCi/L, federal limit 5 pCi/L (at or just above the limit)
 340 Jul 1, 2021 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Apr 1, 2021 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.2 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Jan 1, 2021 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.9 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Oct 1, 2020 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.9 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Jul 1, 2020 Resolved 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 Jan 1, 2020 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 9.6 pCi/L, federal limit 5 pCi/L (1.9 times the limit)
 340 Apr 1, 2017 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.3 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
 340 Jan 1, 2017 Resolved No

Full record since 1997

EPA's records for Winona go back to 1997. Before October 19, 2016 they list no health-based violations and 1 monitoring or reporting violation.

Violations that began in Health-based Monitoring and reporting
1990s 0 1
October 19, 2016 to 2019 2 0
2020s 6 0

Enforcement actions

Minnesota regulators took 1 formal enforcement action against Winona in 2020, filed as 4 records in EPA's data. The most recent was a compliance order (no penalty) in November 2020.

Date By Action Violations covered
Nov 16, 2020 Minnesota Compliance order (no penalty) 5 violations (5 health-based): Combined Radium (-226 and -228)

What the violations mean

Combined Radium (-226 and -228)

8 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

Winona draws water from 8 wells.

Annual water quality report

Winona 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.

Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.

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 Minnesota.

Certified drinking water labs by state EPA guidance for private wells