DIAMOND, IL · Grundy County

DIAMOND Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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): IL0630250
System type: Community Water System
Population served: 2,508
Service connections: 920
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring and Reporting (DBP)
—
TTHM
September 1, 2015 – August 31, 2016
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
September 1, 2015 – August 31, 2016
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
April 1, 2015 – June 30, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 2004 – July 31, 2004
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
July 1, 2004 – July 31, 2004
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
April 1, 2003 – June 30, 2003
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
January 1, 2003 – March 31, 2003
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 2002 – December 31, 2002
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 2000 – November 30, 2000
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
September 1, 2000 – September 30, 2002
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
July 1, 2000 – July 31, 2000
Resolved
Monitoring, Regular
—
Picloram
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
LASSO
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
2,4-D
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Chlordane
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 1999 – January 31, 1999
Archived
Monitoring, Regular
—
Endrin
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Dalapon
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Diquat
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Endothall
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Simazine
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Aldicarb sulfone
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Aldicarb
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 1998 – October 31, 1998
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 1998 – November 22, 1999
Resolved
Monitoring, Regular
—
Nitrate
October 1, 1998 – December 31, 1998
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1998 – June 30, 1998
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 1997 – November 30, 1997
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 1997 – November 22, 1999
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1997 – June 30, 1997
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
April 24, 1997 – March 3, 1999
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 1996 – November 30, 1996
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
September 1, 1996 – August 31, 2000
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 1995 – November 22, 1999
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 1994 – July 31, 1994
Archived
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
September 1, 1992 – August 31, 1996
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 1992 – September 30, 1992
Archived
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
August 1, 1992 – August 31, 1992
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 1992 – January 31, 1992
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 1991 – January 31, 1991
Archived
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 1988 – August 31, 1992
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
September 1, 1988 – August 31, 1992
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
October 1, 1984 – September 30, 1988
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
September 14, 1984 – September 13, 1988
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
October 17, 1980 – October 16, 1984
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 30, 1977 – June 29, 1981
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
September 1, 2015 – August 31, 2016	Monitoring and Reporting (DBP)	TTHM	—	Resolved
September 1, 2015 – August 31, 2016	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
April 1, 2015 – June 30, 2015	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
July 1, 2004 – July 31, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2004 – July 31, 2004	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 2003 – June 30, 2003	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
January 1, 2003 – March 31, 2003	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 2002 – December 31, 2002	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
November 1, 2000 – November 30, 2000	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 2000 – September 30, 2002	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
July 1, 2000 – July 31, 2000	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Picloram	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	LASSO	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	2,4-D	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Chlordane	—	Resolved
January 1, 1999 – January 31, 1999	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
January 1, 1999 – March 31, 1999	Monitoring, Regular	Endrin	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Dalapon	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Diquat	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Endothall	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Simazine	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Aldicarb sulfone	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Aldicarb	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
October 1, 1998 – October 31, 1998	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 1998 – November 22, 1999	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
October 1, 1998 – December 31, 1998	Monitoring, Regular	Nitrate	—	Resolved
June 1, 1998 – June 30, 1998	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
November 1, 1997 – November 30, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 1997 – November 22, 1999	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
June 1, 1997 – June 30, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 24, 1997 – March 3, 1999	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
November 1, 1996 – November 30, 1996	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 1996 – August 31, 2000	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 1995 – November 22, 1999	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 1994 – July 31, 1994	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
September 1, 1992 – August 31, 1996	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
September 1, 1992 – September 30, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
August 1, 1992 – August 31, 1992	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Archived
January 1, 1992 – January 31, 1992	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
January 1, 1991 – January 31, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
October 1, 1988 – August 31, 1992	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
September 1, 1988 – August 31, 1992	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 1984 – September 30, 1988	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
September 14, 1984 – September 13, 1988	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
October 17, 1980 – October 16, 1984	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
June 30, 1977 – June 29, 1981	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

September 7, 2017State Compliance achieved2 linked violations
June 12, 2017State Public Notification received2 linked violations
October 17, 2016State Public Notification requested2 linked violations
October 17, 2016State Violation/Reminder Notice2 linked violations
September 1, 2015State Compliance achieved1 linked violation
July 15, 2015State Violation/Reminder Notice1 linked violation
March 22, 2005State Public Notification received1 linked violation
February 1, 2005State Compliance achieved2 linked violations
October 6, 2004State Violation/Reminder Notice2 linked violations
October 6, 2004State Public Notification requested2 linked violations
January 7, 2004State Compliance achieved11 linked violations
April 10, 2003State Violation/Reminder Notice1 linked violation
April 10, 2003State Public Notification requested1 linked violation
January 10, 2003State Violation/Reminder Notice1 linked violation
January 10, 2003State Public Notification requested1 linked violation
November 5, 2001State Compliance achieved4 linked violations
October 26, 2001State Bilateral Compliance Agreement signed9 linked violations
June 1, 2001State Compliance achieved6 linked violations
January 15, 2001State Public Notification requested5 linked violations
July 15, 2000State Public Notification requested12 linked violations
May 22, 2000Federal Compliance achieved13 linked violations
November 22, 1999State Compliance achieved6 linked violations
August 20, 1999State Compliance achieved31 linked violations
April 28, 1999State Public Notification requested1 linked violation
April 28, 1999State Violation/Reminder Notice1 linked violation
April 22, 1999State Public Notification requested31 linked violations
April 22, 1999State Violation/Reminder Notice31 linked violations
March 15, 1999State Public Notification requested1 linked violation
March 15, 1999State Violation/Reminder Notice1 linked violation
March 3, 1999State Compliance achieved1 linked violation
January 4, 1999State Public Notification requested1 linked violation
January 4, 1999State Violation/Reminder Notice1 linked violation
December 15, 1998State Public Notification requested1 linked violation
December 15, 1998State Violation/Reminder Notice1 linked violation
August 15, 1998State Public Notification requested1 linked violation
August 15, 1998State Violation/Reminder Notice1 linked violation
January 24, 1998State Public Notification requested1 linked violation
January 24, 1998State Violation/Reminder Notice1 linked violation
January 6, 1998State Compliance achieved2 linked violations
August 23, 1997State Violation/Reminder Notice1 linked violation
August 23, 1997State Public Notification requested1 linked violation
January 25, 1997State Violation/Reminder Notice1 linked violation
January 25, 1997State Public Notification requested1 linked violation
January 15, 1997State Public Notification received1 linked violation
November 23, 1996State Public Notification requested2 linked violations
November 23, 1996State Violation/Reminder Notice2 linked violations
March 22, 1996State Violation/Reminder Notice1 linked violation
March 22, 1996State Public Notification requested1 linked violation
November 17, 1995State Compliance achieved1 linked violation
July 10, 1995State Public Notification received1 linked violation
September 25, 1994State Public Notification requested1 linked violation
September 25, 1994State Public Notification requested1 linked violation
September 25, 1994State Violation/Reminder Notice1 linked violation
September 25, 1994State Violation/Reminder Notice1 linked violation
August 15, 1994State Public Notification received1 linked violation
August 15, 1994State Public Notification received1 linked violation
October 31, 1992State Public Notification requested1 linked violation
October 31, 1992State Violation/Reminder Notice1 linked violation
October 4, 1992State Violation/Reminder Notice1 linked violation
October 4, 1992State Public Notification requested1 linked violation
September 23, 1992State Public Notification received1 linked violation
September 14, 1992State Public Notification received1 linked violation
August 13, 1992State Compliance achieved3 linked violations
June 4, 1992State Public Notification received3 linked violations
June 3, 1992State Public Notification received3 linked violations
May 7, 1992State Public Notification requested3 linked violations
March 9, 1992State Public Notification received1 linked violation
March 8, 1992State Public Notification requested1 linked violation
March 8, 1992State Violation/Reminder Notice1 linked violation
January 6, 1992State Public Notification received3 linked violations
September 7, 1991State Violation/Reminder Notice1 linked violation
September 7, 1991State Public Notification requested1 linked violation
August 20, 1991State Public Notification requested3 linked violations
August 14, 1991State Public Notification received1 linked violation
July 17, 1991State Public Notification received3 linked violations
April 3, 1991State Public Notification received3 linked violations
March 20, 1991State Public Notification received1 linked violation
March 10, 1991State Public Notification requested1 linked violation
January 19, 1991State Public Notification requested3 linked violations
October 15, 1990State Public Notification received5 linked violations
August 6, 1990State Public Notification received3 linked violations
April 5, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
April 5, 1990State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
April 2, 1990State Public Notification received3 linked violations
January 1, 1990State Public Notification received3 linked violations
October 16, 1989State Public Notification received3 linked violations
August 14, 1989State Public Notification received2 linked violations
August 5, 1989State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
July 10, 1989State Public Notification requested6 linked violations
November 30, 1988State Public Notification received3 linked violations

Contact

KERNC, TERESA

815-634-8149

DIAMOND, IL 60416