Public water system record
Sun Prairie Utilities
Serves Sun Prairie, Dane County, WI · 33,966 people served
Federal records show 1 health-based violation and 1 monitoring/reporting issue for Sun Prairie Utilities in the last ten years. The most serious issue in this window was a resolved Fluoride 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
- Sun Prairie Utilities draws water from 7 wells.
- Highest measured level in the last 10 years: Fluoride, 6.8785 mg/L, federal limit 4 mg/L (1.7 times the limit), 2023.
- Record on file since 1998, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 12,217 service lines.
Check whether Sun Prairie Utilities 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 |
|---|---|---|---|---|
|
Fluoride
Contaminant limit exceeded
Measured 6.8785 mg/L, federal limit 4 mg/L (1.7 times the limit)
|
330 | Jan 1, 2023 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Nitrate
Monitoring and reporting
|
Jul 1, 2021 | Resolved |
Full record since 1998
EPA's records for Sun Prairie Utilities go back to 1998. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 21 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 0 |
| 2000s | 0 | 21 |
| 2020s | 1 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began July 1998, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1998 | Resolved |
What the violations mean
Fluoride
1 incidentFluoride exceeded the federal limit
Excessive fluoride can cause dental and skeletal fluorosis
Where the water comes from
Sun Prairie Utilities draws water from 7 wells.
Annual water quality report
Sun Prairie Utilities 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.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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