Public water system record
Unionville PWS
Serves Unionville, Putnam County, MO · 1,735 people served
Federal records show 2 health-based violations and 2 monitoring/reporting issues for Unionville PWS in the last ten years. The most serious issue in this window was a resolved Interim Enhanced Surface Water Treatment Rule violation.
System profile
- Health-based violations, last 10 years
- 2
- Resolved
- 2
- Unresolved
- 0
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 2
Key facts
- Unionville PWS buys its water from Rathbun Regional Water Association.
- Most recent enforcement action: boil water order by Missouri, July 2021.
- Record on file since 1992, with 5 health-based violations before October 19, 2016.
- Lead pipe inventory: 6 lead and 58 unknown out of 1,103 service lines.
Check whether Unionville PWS 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 |
|---|---|---|---|---|
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Jul 1, 2021 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Jul 1, 2021 | 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
|
Nov 1, 2024 | Resolved |
|
Public Notice
OTHER
|
Oct 25, 2021 | Resolved |
Full record since 1992
EPA's records for Unionville PWS go back to 1992. Before October 19, 2016 they list 5 health-based violations (5 resolved) and 4 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 1 |
| 2000s | 1 | 0 |
| 2010 to October 18, 2016 | 3 | 3 |
| 2020s | 2 | 2 |
Most recent health-based violation before October 19, 2016: Haloacetic Acids (HAA5), began January 2016, Resolved.
Show all 5 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 65.2 µg/L, federal limit 60 µg/L (1.1 times the limit)
|
Jan 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 83 µg/L, federal limit 80 µg/L (at or just above the limit)
|
Oct 1, 2015 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 72 µg/L, federal limit 60 µg/L (1.2 times the limit)
|
Oct 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Mar 1, 2001 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Aug 1, 1993 | Resolved |
Enforcement actions
Missouri regulators issued 1 boil water order to Unionville PWS in 2021. The most recent was a boil water order in July 2021.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jul 9, 2021 | Missouri | Boil water order | 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule |
What the violations mean
Interim Enhanced Surface Water Treatment Rule
2 incidentsThe system did not meet a filtration or treatment requirement for surface water
Inadequate treatment of surface water can let pathogens such as Cryptosporidium and Giardia through
Where the water comes from
Unionville PWS buys its water from Rathbun Regional Water Association. It lists no wells or intakes of its own. 1 other community water system buys water from Unionville PWS.
Buys water from
- Rathbun Regional Water Association Centerville, IA
Community systems that buy water from it
- Putnam County PWSD 1 Unionville, MO
Annual water quality report
Unionville PWS 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