Public water system record
Mercer County PWSD 1
Serves an area of Mercer County and Harrison County, MO that includes Mercer and Ravanna · 3,200 people served
Federal records show no health-based violations and 6 monitoring/reporting issues for Mercer County PWSD 1 in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 6
Key facts
- Mercer County PWSD 1 buys its water from Princeton PWS and Rathbun Regional Water Assn (Rathbun).
- Record on file since 1995, with 3 health-based violations before October 19, 2016.
- Lead pipe inventory: 1 lead and 103 unknown out of 1,548 service lines.
Check whether Mercer County PWSD 1 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.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Mar 27, 2025 | Resolved |
|
Public Notice
OTHER
|
Mar 5, 2025 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jun 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Feb 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jan 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2023 | Resolved |
Full record since 1995
EPA's records for Mercer County PWSD 1 go back to 1995. Before October 19, 2016 they list 3 health-based violations (3 resolved) and 4 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 1 |
| 2000s | 1 | 0 |
| 2010 to October 18, 2016 | 2 | 3 |
| 2020s | 0 | 6 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began July 2015, Resolved.
Show all 3 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 83 µg/L, federal limit 80 µg/L (at or just above the limit)
|
Jul 1, 2015 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 2010 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2003 | Resolved |
Where the water comes from
Mercer County PWSD 1 buys its water from Princeton PWS and Rathbun Regional Water Assn (Rathbun). It lists no wells or intakes of its own. It also has an emergency connection to Putnam County PWSD 1. 1 other public water system has an emergency connection to Mercer County PWSD 1.
Buys water from
- Princeton PWS Princeton, MO
- Rathbun Regional Water Assn (Rathbun) Centerville, IA
Emergency or part-time connections to
- Putnam County PWSD 1 Unionville, MO
Annual water quality report
Mercer County PWSD 1 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 Missouri.
Certified drinking water labs by state EPA guidance for private wells