MOUNT VERNON, OH · Knox County
WILHELM ESTATES MHP Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of December 1, 1995. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.
If you are a resident looking for your current water provider, see water systems in Knox County, OH.
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 Ohio’s official records. Always confirm current status with Ohio before making decisions based on this information.
System facts
- System ID (PWSID)
- OH4202412
- System type
- Community Water System
- Population served
- 31
- Service connections
- 24
- Ownership
- privately owned
- Water source
- groundwater (wells)
WILHELM ESTATES MHP is one of 1,399 community water systems in Ohio in the 500 or fewer people size category, formerly serving 31 people from groundwater.
EPA's federal records list this system as inactive in 1995; the record below is historical.
As of August 1, 2026, its federal record holds 14 entries between 1986 and 1994, all of which EPA lists as closed. Nothing has been added since 1994.
Of the 14, 10 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 inorganic chemicals, the Total Coliform Rules, and synthetic organic chemicals.
Violation history
Maximum Contaminant Level Violation, Acute (TCR)
Health-basedColiform (TCR)
August 1, 1994 – August 31, 1994
ArchivedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
August 1, 1994 – August 31, 1994
ArchivedMaximum Contaminant Level Violation, Acute (TCR)
Health-basedColiform (TCR)
February 1, 1994 – February 28, 1994
ArchivedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
February 1, 1994 – February 28, 1994
ArchivedMonitoring, Regular
—Di(2-ethylhexyl) adipate
January 1, 1994 – March 31, 1994
ResolvedMonitoring, Regular
—Di(2-ethylhexyl) phthalate
January 1, 1994 – March 31, 1994
ResolvedMonitoring, Regular
—Benzo(a)pyrene
January 1, 1994 – March 31, 1994
ResolvedMonitoring, Regular
—Pentachlorophenol
January 1, 1994 – March 31, 1994
ResolvedMonitoring, Regular
—Arsenic
October 14, 1986 – October 13, 1989
ArchivedMonitoring, Regular
—Barium
October 14, 1986 – October 13, 1989
ResolvedMonitoring, Regular
—Cadmium
October 14, 1986 – October 13, 1989
ResolvedMonitoring, Regular
—Chromium
October 14, 1986 – October 13, 1989
ResolvedMonitoring, Regular
—Fluoride
October 14, 1986 – October 13, 1989
ResolvedMonitoring, Regular
—Mercury
October 14, 1986 – October 13, 1989
Resolved
Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| August 1, 1994 – August 31, 1994 | Maximum Contaminant Level Violation, Acute (TCR) | Coliform (TCR) | Health-based | Archived |
| August 1, 1994 – August 31, 1994 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Archived |
| February 1, 1994 – February 28, 1994 | Maximum Contaminant Level Violation, Acute (TCR) | Coliform (TCR) | Health-based | Archived |
| February 1, 1994 – February 28, 1994 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Archived |
| January 1, 1994 – March 31, 1994 | Monitoring, Regular | Di(2-ethylhexyl) adipate | — | Resolved |
| January 1, 1994 – March 31, 1994 | Monitoring, Regular | Di(2-ethylhexyl) phthalate | — | Resolved |
| January 1, 1994 – March 31, 1994 | Monitoring, Regular | Benzo(a)pyrene | — | Resolved |
| January 1, 1994 – March 31, 1994 | Monitoring, Regular | Pentachlorophenol | — | Resolved |
| October 14, 1986 – October 13, 1989 | Monitoring, Regular | Arsenic | — | Archived |
| October 14, 1986 – October 13, 1989 | Monitoring, Regular | Barium | — | Resolved |
| October 14, 1986 – October 13, 1989 | Monitoring, Regular | Cadmium | — | Resolved |
| October 14, 1986 – October 13, 1989 | Monitoring, Regular | Chromium | — | Resolved |
| October 14, 1986 – October 13, 1989 | Monitoring, Regular | Fluoride | — | Resolved |
| October 14, 1986 – October 13, 1989 | Monitoring, Regular | Mercury | — | Resolved |
Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state
Enforcement actions
- February 13, 1990State Compliance achieved8 linked violations
- October 23, 1989State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
- October 22, 1986State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
- August 27, 1986State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
- August 16, 1985State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
Last known contact on file (system is inactive)
Not on record
440-564-2279
MOUNT VERNON, OH 43050