HERCULANEUM, MO · Jefferson County
HERCULANEUM PWS Water System
Consumer Confidence Report status
HERCULANEUM PWS must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show 1 item for HERCULANEUM PWS that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Missouri’s official records. Always confirm current status with Missouri before making decisions based on this information.
System facts
- System ID (PWSID)
- MO6010359
- System type
- Community Water System
- Population served
- 5,000
- Service connections
- 1,966
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
HERCULANEUM PWS is one of 140 community water systems in Missouri in the 3,301 to 10,000 people size category, serving 5,000 people from surface water.
As of August 1, 2026, its federal record holds 3 entries between 2001 and 2025, of which 1 remains open; none are health-based.
All 3 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Lead and Copper Rule and the Total Coliform Rules.
Violation history
Notification, Known or Potential LSL
—LEAD AND COPPER RULE REVISIONS
July 2, 2025
UnaddressedFollow-up Or Routine LCR Tap M/R
—Lead and Copper Rule
October 1, 2006 – August 29, 2007
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
November 1, 2001 – November 30, 2001
Resolved
Unaddressed no corrective action on record yetResolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| July 2, 2025 | Notification, Known or Potential LSL | LEAD AND COPPER RULE REVISIONS | — | Unaddressed |
| October 1, 2006 – August 29, 2007 | Follow-up Or Routine LCR Tap M/R | Lead and Copper Rule | — | Resolved |
| November 1, 2001 – November 30, 2001 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
Unaddressed no corrective action on record yetResolved addressed and confirmed by the state
Enforcement actions
No enforcement actions on record for this system.
Common questions
Is HERCULANEUM PWS required to publish a Consumer Confidence Report?
- Yes. HERCULANEUM PWS is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is HERCULANEUM PWS’s next Consumer Confidence Report due?
- HERCULANEUM PWS’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does HERCULANEUM PWS have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show 1 item for HERCULANEUM PWS that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
JOHNSON, MARK
636-475-4447
HERCULANEUM, MO 63048-0000