MOUNT VERNON, OH · Knox County
ODMRDD-MT VERNON DEV CTR Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of October 1, 2001. 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)
- OH4201212
- System type
- Community Water System
- Population served
- 242
- Service connections
- 16
- Ownership
- privately owned
- Water source
- groundwater (wells)
ODMRDD-MT VERNON DEV CTR is one of 1,399 community water systems in Ohio in the 500 or fewer people size category, formerly serving 242 people from groundwater.
EPA's federal records list this system as inactive in 2001; the record below is historical.
As of August 1, 2026, its federal record holds 13 entries between 1986 and 1992, all of which EPA lists as closed. Nothing has been added since 1992.
All 13 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 and synthetic organic chemicals.
Violation history
Monitoring, Regular
—Endrin
January 1, 1992 – December 31, 1992
ResolvedMonitoring, Regular
—BHC-GAMMA
January 1, 1992 – December 31, 1992
ResolvedMonitoring, Regular
—Methoxychlor
January 1, 1992 – December 31, 1992
ResolvedMonitoring, Regular
—Toxaphene
January 1, 1992 – December 31, 1992
ResolvedMonitoring, Regular
—2,4-D
January 1, 1992 – December 31, 1992
ResolvedMonitoring, Regular
—2,4,5-TP
January 1, 1992 – December 31, 1992
ResolvedMonitoring, Regular
—Arsenic
December 31, 1986 – December 30, 1989
ArchivedMonitoring, Regular
—Barium
December 31, 1986 – December 30, 1989
ArchivedMonitoring, Regular
—Cadmium
December 31, 1986 – December 30, 1989
ArchivedMonitoring, Regular
—Chromium
December 31, 1986 – December 30, 1989
ArchivedMonitoring, Regular
—Fluoride
December 31, 1986 – December 30, 1989
ArchivedMonitoring, Regular
—Nitrate
December 31, 1986 – December 30, 1989
ArchivedMonitoring, Regular
—Selenium
December 31, 1986 – December 30, 1989
Archived
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 1992 – December 31, 1992 | Monitoring, Regular | Endrin | — | Resolved |
| January 1, 1992 – December 31, 1992 | Monitoring, Regular | BHC-GAMMA | — | Resolved |
| January 1, 1992 – December 31, 1992 | Monitoring, Regular | Methoxychlor | — | Resolved |
| January 1, 1992 – December 31, 1992 | Monitoring, Regular | Toxaphene | — | Resolved |
| January 1, 1992 – December 31, 1992 | Monitoring, Regular | 2,4-D | — | Resolved |
| January 1, 1992 – December 31, 1992 | Monitoring, Regular | 2,4,5-TP | — | Resolved |
| December 31, 1986 – December 30, 1989 | Monitoring, Regular | Arsenic | — | Archived |
| December 31, 1986 – December 30, 1989 | Monitoring, Regular | Barium | — | Archived |
| December 31, 1986 – December 30, 1989 | Monitoring, Regular | Cadmium | — | Archived |
| December 31, 1986 – December 30, 1989 | Monitoring, Regular | Chromium | — | Archived |
| December 31, 1986 – December 30, 1989 | Monitoring, Regular | Fluoride | — | Archived |
| December 31, 1986 – December 30, 1989 | Monitoring, Regular | Nitrate | — | Archived |
| December 31, 1986 – December 30, 1989 | Monitoring, Regular | Selenium | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- August 24, 1987State Formal Notice of Violation issued8 linked violations
- February 7, 1986State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
- September 23, 1985State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
Last known contact on file (system is inactive)
Not on record
740-393-6239
MOUNT VERNON, OH 43050