Public water system record
Stockton
Serves Stockton, Winona County, MN · 697 people served
Federal records show 1 health-based violation and 1 monitoring/reporting issue for Stockton in the last ten years. The most serious issue in this window was a resolved Combined Radium (-226 and -228) violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- Stockton draws water from 2 wells.
- Highest measured level in the last 10 years: Combined Radium (-226 and -228), 6.3 pCi/L, federal limit 5 pCi/L (1.3 times the limit), 2016.
- Most recent formal enforcement: compliance order (no penalty) by Minnesota, April 2017.
- Record on file since 2012, with 2 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 141 service lines.
Check whether Stockton serves your address
Health-based violations
Since October 2016Violation 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 6.3 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
|
340 | Jan 1, 2016 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
Full record since 2012
EPA's records for Stockton go back to 2012. Before October 19, 2016 they list 2 health-based violations (2 resolved) and no monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2010 to October 18, 2016 | 2 | 0 |
| October 19, 2016 to 2019 | 0 | 1 |
Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began January 2016, Resolved.
Show all 2 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.3 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
|
Jan 1, 2016 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.7 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
Sep 26, 2012 | Resolved |
Enforcement actions
Minnesota regulators took 2 formal enforcement actions against Stockton between 2013 and 2017. The most recent was a compliance order (no penalty) in April 2017.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Apr 6, 2017 | Minnesota | Compliance order (no penalty) | 1 violation (1 health-based): Combined Radium (-226 and -228) |
| Dec 18, 2013 | Minnesota | Compliance order (no penalty) | 1 violation (1 health-based): Combined Radium (-226 and -228) |
What the violations mean
Combined Radium (-226 and -228)
1 incidentTest results for Combined Radium (-226 and -228) were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about this violation.
Where the water comes from
Stockton draws water from 2 wells.
Annual water quality report
Stockton 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