BOISE, ID · Ada County
UWI MESA WATER COMPANY Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of December 1, 1998. 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 Ada County, ID.
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 Idaho’s official records. Always confirm current status with Idaho before making decisions based on this information.
System facts
- System ID (PWSID)
- ID4010157
- System type
- Community Water System
- Population served
- 875
- Service connections
- 355
- Ownership
- privately owned
- Water source
- groundwater (wells)
UWI MESA WATER COMPANY is one of 133 community water systems in Idaho in the 501 to 3,300 people size category, formerly serving 875 people from groundwater.
EPA's federal records list this system as inactive in 1998; the record below is historical.
As of August 1, 2026, its federal record holds 7 entries between 1991 and 1997, all of which EPA lists as closed. Nothing has been added since 1997.
Of the 7, 6 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 Total Coliform Rules.
Violation history
Maximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
June 1, 1997 – June 30, 1997
ArchivedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
February 1, 1997 – February 28, 1997
ArchivedMonitoring, Repeat Minor (TCR)
—Coliform (TCR)
January 1, 1997 – January 31, 1997
ArchivedMonitoring, Routine Major (TCR)
—Coliform (TCR)
November 1, 1996 – November 30, 1996
ArchivedMonitoring, Routine Major (TCR)
—Coliform (TCR)
October 1, 1996 – October 31, 1996
ArchivedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
August 1, 1994 – August 31, 1994
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
January 1, 1991 – March 31, 1991
Archived
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 |
|---|---|---|---|---|
| June 1, 1997 – June 30, 1997 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Archived |
| February 1, 1997 – February 28, 1997 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Archived |
| January 1, 1997 – January 31, 1997 | Monitoring, Repeat Minor (TCR) | Coliform (TCR) | — | Archived |
| November 1, 1996 – November 30, 1996 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Archived |
| October 1, 1996 – October 31, 1996 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Archived |
| August 1, 1994 – August 31, 1994 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
| January 1, 1991 – March 31, 1991 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Archived |
Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state
Enforcement actions
- December 31, 1998State Compliance achieved4 linked violations
Last known contact on file (system is inactive)
Not on record
208-362-7371
BOISE, ID 83707