Public water system record
Potosi Waterworks
Serves Potosi, Grant County, WI · 718 people served
Federal records show 2 health-based violations and 3 monitoring/reporting issues for Potosi Waterworks in the last ten years. The most serious issue in this window was a resolved Stage 1 Disinfection Byproducts Rule violation.
System profile
- Health-based violations, last 10 years
- 2
- Resolved
- 2
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 3
Key facts
- Potosi Waterworks draws water from 1 well.
- Record on file since 1994, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 2 lead and 47 unknown out of 291 service lines.
Check whether Potosi Waterworks 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 |
|---|---|---|---|---|
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
210 | Mar 1, 2024 | Resolved | No |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
210 | May 2, 2018 | 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
|
Jan 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Mar 1, 2018 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
Full record since 1994
EPA's records for Potosi Waterworks go back to 1994. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 28 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 23 |
| 2010 to October 18, 2016 | 0 | 5 |
| October 19, 2016 to 2019 | 1 | 2 |
| 2020s | 1 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began May 1996, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
May 1, 1996 | Resolved |
What the violations mean
Stage 1 Disinfection Byproducts Rule
2 incidentsThe system did not meet a treatment requirement of the Stage 1 Disinfectants and Disinfection Byproducts Rule
Byproducts form when disinfectants react with natural material in water. Long-term exposure above federal limits may increase cancer risk
Where the water comes from
Potosi Waterworks draws water from 1 well.
Annual water quality report
Potosi 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