Public water system record
Marshall Waterworks
Serves Marshall, Dane County, WI · 3,862 people served
Federal records show 1 health-based violation and no monitoring/reporting issues for Marshall Waterworks 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
- 0
Key facts
- Marshall Waterworks draws water from 3 wells.
- Highest measured level in the last 10 years: Combined Radium (-226 and -228), 5.78 pCi/L, federal limit 5 pCi/L (1.2 times the limit), 2017.
- Most recent formal enforcement: compliance order (no penalty) by Wisconsin, May 2018.
- Record on file since 1993, with 2 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 488 unknown out of 1,179 service lines.
Check whether Marshall 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 |
|---|---|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.78 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
|
340 | Oct 1, 2017 | Resolved | No |
Full record since 1993
EPA's records for Marshall Waterworks go back to 1993. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 9 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 7 |
| 2010 to October 18, 2016 | 2 | 2 |
| October 19, 2016 to 2019 | 1 | 0 |
Most recent health-based violation before October 19, 2016: Combined Radium (-226 and -228), began January 2015, Resolved.
Show all 2 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.56 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
|
Jan 1, 2015 | Resolved |
|
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 5.57 pCi/L, federal limit 5 pCi/L (1.1 times the limit)
|
Oct 1, 2014 | Resolved |
Enforcement actions
Wisconsin regulators took 2 formal enforcement actions against Marshall Waterworks between 2015 and 2018, filed as 3 records in EPA's data. The most recent was a compliance order (no penalty) in May 2018.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 31, 2018 | Wisconsin | Compliance order (no penalty) | 1 violation (1 health-based): Combined Radium (-226 and -228) |
| Aug 31, 2015 | Wisconsin | Compliance order (no penalty) | 2 violations (2 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
Marshall Waterworks draws water from 3 wells.
Annual water quality report
Marshall 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