Public water system record
Pomeroy Water Supply
Serves Pomeroy, Calhoun County, IA · 671 people served
Federal records show 1 health-based violation and 3 monitoring/reporting issues for Pomeroy Water Supply in the last ten years. The most serious issue in this window was a resolved Nitrite violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 3
Key facts
- Pomeroy Water Supply draws water from 2 wells.
- Highest measured level in the last 10 years: Nitrite, 2.35 mg/L, federal limit 1 mg/L (2.4 times the limit), 2025.
- Record on file since 2006, with 0 health-based violations before October 19, 2016.
- Lead pipe inventory: 7 lead and 3 unknown out of 225 service lines.
Check whether Pomeroy Water Supply 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 |
|---|---|---|---|---|
|
Nitrite
Contaminant limit exceeded
Measured 2.35 mg/L, federal limit 1 mg/L (2.4 times the limit)
|
330 | Jul 1, 2025 | Resolved | Yes |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Revised Total Coliform Rule
Monitoring violation
|
May 1, 2025 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2024 | Resolved |
|
Nitrite
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
Full record since 2006
EPA's records for Pomeroy Water Supply go back to 2006. Before October 19, 2016 they list no health-based violations and 4 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 0 | 3 |
| 2010 to October 18, 2016 | 0 | 1 |
| 2020s | 1 | 3 |
What the violations mean
Nitrite
1 incidentNitrite exceeded the federal limit
High nitrite is especially dangerous for infants under 6 months
Where the water comes from
Pomeroy Water Supply draws water from 2 wells.
Annual water quality report
Pomeroy Water Supply 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 Iowa.
Certified drinking water labs by state EPA guidance for private wells