CONCORDVILLE, PA · Delaware County
WEST MATTSON CO. INC. Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of March 24, 1994. 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 Delaware County, PA.
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 Pennsylvania’s official records. Always confirm current status with Pennsylvania before making decisions based on this information.
System facts
- System ID (PWSID)
- PA1230013
- System type
- Community Water System
- Population served
- 200
- Service connections
- 57
- Ownership
- privately owned
- Water source
- groundwater (wells)
WEST MATTSON CO. INC. is one of 3,064 community water systems in Pennsylvania in the 500 or fewer people size category, formerly serving 200 people from groundwater.
EPA's federal records list this system as inactive in 1994; the record below is historical.
As of August 1, 2026, its federal record holds 20 entries between 1991 and 1994, all of which EPA lists as closed. Nothing has been added since 1994.
Of the 20, 16 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 volatile organic chemicals and the Total Coliform Rules.
Violation history
Maximum Contaminant Level Violation, Average
Health-based1,1,1-Trichloroethane
April 1, 1994 – March 24, 1994
ResolvedMaximum Contaminant Level Violation, Average
Health-based1,1,1-Trichloroethane
January 1, 1994 – March 24, 1994
ResolvedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
September 1, 1993 – September 30, 1993
ResolvedMaximum Contaminant Level Violation, Acute (TCR)
Health-basedColiform (TCR)
September 1, 1993 – September 30, 1993
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
October 1, 1991 – December 31, 1991
ResolvedMonitoring, Regular
—Carbon tetrachloride
October 1, 1991 – December 31, 1991
ResolvedMonitoring, Regular
—Trichloroethylene
October 1, 1991 – December 31, 1991
ResolvedMonitoring, Regular
—Benzene
October 1, 1991 – December 31, 1991
ResolvedMonitoring, Regular
—p-Dichlorobenzene
October 1, 1991 – December 31, 1991
ResolvedMonitoring, Regular
—Vinyl chloride
October 1, 1991 – December 31, 1991
ResolvedMonitoring, Regular
—p-Dichlorobenzene
October 1, 1991 – December 31, 1991
ResolvedMonitoring, Regular
—1,2-Dichloroethane
October 1, 1991 – December 31, 1991
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
October 1, 1991 – December 31, 1991
ResolvedMonitoring, Regular
—Carbon tetrachloride
October 1, 1991 – December 31, 1991
ResolvedMonitoring, Regular
—Trichloroethylene
October 1, 1991 – December 31, 1991
ResolvedMonitoring, Regular
—Benzene
October 1, 1991 – December 31, 1991
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
October 1, 1991 – December 31, 1991
ResolvedMonitoring, Regular
—Vinyl chloride
October 1, 1991 – December 31, 1991
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
October 1, 1991 – December 31, 1991
ResolvedMonitoring, Regular
—1,2-Dichloroethane
October 1, 1991 – December 31, 1991
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| April 1, 1994 – March 24, 1994 | Maximum Contaminant Level Violation, Average | 1,1,1-Trichloroethane | Health-based | Resolved |
| January 1, 1994 – March 24, 1994 | Maximum Contaminant Level Violation, Average | 1,1,1-Trichloroethane | Health-based | Resolved |
| September 1, 1993 – September 30, 1993 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Resolved |
| September 1, 1993 – September 30, 1993 | Maximum Contaminant Level Violation, Acute (TCR) | Coliform (TCR) | Health-based | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | Benzene | — | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | Vinyl chloride | — | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | Benzene | — | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | Vinyl chloride | — | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| October 1, 1991 – December 31, 1991 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
No enforcement actions on record for this system.
Last known contact on file (system is inactive)
Not on record
610-459-5395
CONCORDVILLE, PA 19331