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Public water system record

Lewiston

Serves Lewiston, Winona County, MN · 1,512 people served

Federal records show 2 health-based violations and no monitoring/reporting issues for Lewiston in the last ten years. The most serious issue in this window was a resolved Combined Radium (-226 and -228) violation.

  • MN1850006
  • LEWISTON
  • MN
  • 1,512 served

System profile

Source water Groundwater
ZIP 55952
EPA system ID MN1850006

Verify this system on EPA ECHO →

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

Key facts

  • Lewiston 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), 7.7 pCi/L, federal limit 5 pCi/L (1.5 times the limit), 2017.
  • Most recent formal enforcement: compliance order (no penalty) by Minnesota, March 2019.
  • Record on file since 1991, with 4 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 450 unknown out of 633 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 6.6 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
 340 Jan 1, 2018 Resolved No
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 7.7 pCi/L, federal limit 5 pCi/L (1.5 times the limit)
 340 Jul 1, 2017 Resolved No

Full record since 1991

EPA's records for Lewiston go back to 1991. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 10 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 3 10
2000s 1 0
October 19, 2016 to 2019 2 0

Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began October 2008, Resolved.

Show all 4 health-based violations before October 19, 2016
Contaminant Start date Status
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.5 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
 Oct 8, 2008 Resolved
Nitrate (acute)
Contaminant limit exceeded
 Oct 1, 1998 Resolved
Nitrate (acute)
Contaminant limit exceeded
 Jan 1, 1997 Resolved
Nitrate (acute)
Contaminant limit exceeded
 Oct 1, 1996 Resolved

Enforcement actions

Minnesota regulators took 4 formal enforcement actions against Lewiston between 2010 and 2019. The most recent was a compliance order (no penalty) in March 2019.

Date By Action Violations covered
Mar 15, 2019 Minnesota Compliance order (no penalty) 1 violation (1 health-based): Combined Radium (-226 and -228)
Mar 11, 2014 Minnesota Compliance order (no penalty) 1 violation (1 health-based): Combined Radium (-226 and -228)
Nov 21, 2012 Minnesota Compliance order (no penalty) 1 violation (1 health-based): Combined Radium (-226 and -228)
Nov 10, 2010 Minnesota Signed compliance agreement 1 violation (1 health-based): Combined Radium (-226 and -228)

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

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

Annual water quality report

Lewiston 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 Minnesota.

Certified drinking water labs by state EPA guidance for private wells