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Public water system record

Amboy

Serves Amboy, Blue Earth County, MN · 535 people served

Federal records show 10 health-based violations and 2 monitoring/reporting issues for Amboy 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.

  • MN1070001
  • AMBOY
  • MN
  • 535 served

System profile

Source water Groundwater
ZIP 56010
EPA system ID MN1070001

Verify this system on EPA ECHO →

Health-based violations, last 10 years
10
Resolved
1
Unresolved
0
Archived by EPA
9
Any acute record
No
Monitoring issues, last 10 years
2

Key facts

  • Amboy draws water from 2 wells.
  • Highest measured level in the last 10 years: Combined Radium (-226 and -228), 8.3 pCi/L, federal limit 5 pCi/L (1.7 times the limit), 2023.
  • Most recent formal enforcement: compliance order (no penalty) by Minnesota, April 2013.
  • Record on file since 1994, with 4 health-based violations before October 19, 2016.
  • Lead pipe inventory: 6 lead and 9 unknown out of 266 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
 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
 340 Apr 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 5.1 pCi/L, federal limit 5 pCi/L (at or just above the limit)
 340 Jan 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 8 pCi/L, federal limit 5 pCi/L (1.6 times the limit)
 340 Oct 1, 2023 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 8.3 pCi/L, federal limit 5 pCi/L (1.7 times the limit)
 340 Jul 1, 2023 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
 340 Apr 1, 2023 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 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Jan 1, 2023 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 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 340 Oct 1, 2022 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 5.3 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
 340 Jul 1, 2022 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 5.6 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
 340 Jan 1, 2022 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Jul 1, 2021 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
 Jul 1, 2021 Resolved

Full record since 1994

EPA's records for Amboy go back to 1994. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 3 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 1 1
2000s 1 0
2010 to October 18, 2016 2 2
2020s 10 2

Most recent health-based violation before October 19, 2016: Total Coliform, began July 2015, Resolved.

Show all 4 health-based violations before October 19, 2016
Contaminant Start date Status
Total Coliform
Contaminant limit exceeded
 Jul 1, 2015 Resolved
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 Jul 7, 2010 Resolved
Total Coliform
Contaminant limit exceeded
 Oct 1, 2001 Resolved
Total Coliform
Contaminant limit exceeded
 Oct 1, 1998 Resolved

Enforcement actions

Minnesota regulators took 2 formal enforcement actions against Amboy and issued 1 boil water order between 1998 and 2013. The most recent was a compliance order (no penalty) in April 2013.

Date By Action Violations covered
Apr 15, 2013 Minnesota Compliance order (no penalty) 1 violation (1 health-based): Combined Radium (-226 and -228)
Jan 9, 2012 Minnesota Compliance order (no penalty) 1 violation (1 health-based): Combined Radium (-226 and -228)
Oct 23, 1998 Minnesota Boil water order 1 violation (1 health-based): Total Coliform

What the violations mean

Combined Radium (-226 and -228)

10 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

Amboy draws water from 2 wells.

Annual water quality report

Amboy 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