Public water system record
Hillsboro PWS
Serves Hillsboro, Jefferson County, MO · 3,000 people served
Federal records show 1 health-based violation and 4 monitoring/reporting issues for Hillsboro PWS in the last ten years. The most serious issue in this window was a resolved Revised Total Coliform Rule violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 4
Key facts
- Hillsboro PWS draws water from 3 wells.
- Most recent formal enforcement: signed compliance agreement by Missouri, January 2006.
- Record on file since 1996, with 12 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 4 unknown out of 1,440 service lines.
Check whether Hillsboro 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 |
|---|---|---|---|---|
|
Revised Total Coliform Rule
Treatment technique failure
|
110 | Jun 30, 2025 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Sep 28, 2025 | Resolved |
|
Public Notice
OTHER
|
Feb 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2019 | Resolved |
Full record since 1996
EPA's records for Hillsboro PWS go back to 1996. Before October 19, 2016 they list 12 health-based violations (12 resolved) and 2 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 0 |
| 2000s | 8 | 1 |
| 2010 to October 18, 2016 | 3 | 1 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 1 | 3 |
Most recent health-based violation before October 19, 2016: Total Coliform, began May 2012, Resolved.
Show all 12 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2012 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2011 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 2011 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2007 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2004 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
May 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1996 | Resolved |
Enforcement actions
Missouri regulators took 1 formal enforcement action against Hillsboro PWS and issued 1 boil water order between 2004 and 2006. The most recent was a signed compliance agreement in January 2006.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jan 17, 2006 | Missouri | Signed compliance agreement | 3 violations (3 health-based): Total Coliform |
| May 21, 2004 | Missouri | Boil water order | 2 violations (2 health-based): Total Coliform |
What the violations mean
Revised Total Coliform Rule
1 incidentThe system did not meet a requirement of the Revised Total Coliform Rule
Coliform and E. coli rules protect against bacteria in the distribution system
Where the water comes from
Hillsboro PWS draws water from 3 wells.
Annual water quality report
Hillsboro 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