NORMAL, IL · McLean County

OASIS MHP Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of June 1, 1999. 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 McLean County, IL.

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 Illinois’s official records. Always confirm current status with Illinois before making decisions based on this information.

System facts

System ID (PWSID): IL1135775
System type: Community Water System
Population served: 25
Service connections: 36
Ownership: privately owned
Water source: groundwater (wells)

OASIS MHP is one of 1,572 community water systems in Illinois in the 500 or fewer people size category, formerly serving 25 people from groundwater.

EPA's federal records list this system as inactive in 1999; the record below is historical.

As of August 1, 2026, its federal record holds 13 entries between 1990 and 1994, all of which EPA lists as closed. Nothing has been added since 1994.

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 the Total Coliform Rules.

Violation history

Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 1994 – July 31, 1994
Archived
Monitoring, Regular
—
Arsenic
May 1, 1993 – April 30, 1996
Archived
Monitoring, Regular
—
Barium
May 1, 1993 – April 30, 1996
Archived
Monitoring, Regular
—
Cadmium
May 1, 1993 – April 30, 1996
Archived
Monitoring, Regular
—
Chromium
May 1, 1993 – April 30, 1996
Archived
Monitoring, Regular
—
Fluoride
May 1, 1993 – April 30, 1996
Archived
Monitoring, Regular
—
Mercury
May 1, 1993 – April 30, 1996
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 1991 – May 31, 1991
Archived
Monitoring, Regular
—
Barium
May 1, 1990 – April 30, 1993
Archived
Monitoring, Regular
—
Chromium
May 1, 1990 – April 30, 1993
Archived
Monitoring, Regular
—
Fluoride
May 1, 1990 – April 30, 1993
Archived
Monitoring, Regular
—
Selenium
May 1, 1990 – April 30, 1993
Archived
Monitoring, Regular
—
Arsenic
May 1, 1990 – April 30, 1993
Archived

Archived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 1994 – July 31, 1994	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
May 1, 1993 – April 30, 1996	Monitoring, Regular	Arsenic	—	Archived
May 1, 1993 – April 30, 1996	Monitoring, Regular	Barium	—	Archived
May 1, 1993 – April 30, 1996	Monitoring, Regular	Cadmium	—	Archived
May 1, 1993 – April 30, 1996	Monitoring, Regular	Chromium	—	Archived
May 1, 1993 – April 30, 1996	Monitoring, Regular	Fluoride	—	Archived
May 1, 1993 – April 30, 1996	Monitoring, Regular	Mercury	—	Archived
May 1, 1991 – May 31, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
May 1, 1990 – April 30, 1993	Monitoring, Regular	Barium	—	Archived
May 1, 1990 – April 30, 1993	Monitoring, Regular	Chromium	—	Archived
May 1, 1990 – April 30, 1993	Monitoring, Regular	Fluoride	—	Archived
May 1, 1990 – April 30, 1993	Monitoring, Regular	Selenium	—	Archived
May 1, 1990 – April 30, 1993	Monitoring, Regular	Arsenic	—	Archived

Archived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

August 19, 1995State Violation/Reminder Notice1 linked violation
August 19, 1995State Public Notification requested1 linked violation
October 1, 1994State Public Notification received1 linked violation
September 18, 1994State Public Notification requested2 linked violations
August 31, 1991State Violation/Reminder Notice1 linked violation
June 29, 1991State Violation/Reminder Notice1 linked violation
June 29, 1991State Public Notification requested1 linked violation
January 23, 1991State Public Notification issued16 linked violations
December 29, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
December 29, 1990State Violation/Reminder Notice1 linked violation
December 1, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
December 1, 1990State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
September 30, 1990State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
September 30, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
September 5, 1990State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
August 16, 1990State Public Notification requested16 linked violations
August 1, 1990State Violation/Reminder Notice16 linked violations
July 31, 1990State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
June 30, 1990State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
June 30, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
June 2, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
March 29, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
March 29, 1990State Violation/Reminder Notice2 linked violations
November 21, 1989State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
October 1, 1989State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
December 31, 1988State Violation/Reminder Notice2 linked violations

Last known contact on file (system is inactive)

Not on record

Phone not on record

NORMAL, IL 61761