Is DIAMOND required to publish a Consumer Confidence Report?

Yes. DIAMOND is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is DIAMOND’s next Consumer Confidence Report due?

DIAMOND’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

DIAMOND, IL · Grundy County

DIAMOND Water System

Consumer Confidence Report status

DIAMOND must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for DIAMOND.

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): IL0630250
System type: Community Water System
Population served: 2,508
Service connections: 920
Ownership: local government
Water source: groundwater (wells)

DIAMOND is one of 773 community water systems in Illinois in the 501 to 3,300 people size category, serving 2,508 people from groundwater.

As of August 1, 2026, its federal record holds 58 entries between 1977 and 2015, all of which EPA lists as closed. Nothing has been added since 2015.

Of the 58, 44 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 synthetic organic chemicals, the Radionuclides and Revised Rad Rule, and the Total Coliform Rules.

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, 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, Average
Health-based
Combined Radium (-226 and -228)
September 1, 2000 – September 30, 2002
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
BHC-GAMMA
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
—
Atrazine
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
—
2,4,5-TP
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
January 1, 1999 – March 31, 1999
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 1999 – March 31, 1999
Resolved
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
—
Picloram
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 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
Monitoring, Regular
—
Nitrate
October 1, 1998 – December 31, 1998
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1998 – June 30, 1998
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
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
September 1, 1996 – September 30, 1996
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
September 1, 1996 – August 31, 2000
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1996 – September 30, 1996
Archived
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 1995 – November 22, 1999
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
June 7, 1995 – November 17, 1995
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 1994 – July 31, 1994
Archived
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)
July 1, 1991 – July 31, 1991
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 1991 – January 31, 1991
Archived
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
October 1, 1988 – August 13, 1992
Resolved
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
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
September 1, 2000 – September 30, 2002	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	Nitrate	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	BHC-GAMMA	—	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	Atrazine	—	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	2,4,5-TP	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
January 1, 1999 – March 31, 1999	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
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	Picloram	—	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 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 – December 31, 1998	Monitoring, Regular	Nitrate	—	Resolved
June 1, 1998 – June 30, 1998	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 – September 30, 1996	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
September 1, 1996 – August 31, 2000	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
September 1, 1996 – September 30, 1996	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 1, 1995 – November 22, 1999	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
June 7, 1995 – November 17, 1995	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
July 1, 1994 – July 31, 1994	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
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
July 1, 1991 – July 31, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
January 1, 1991 – January 31, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
October 1, 1988 – August 13, 1992	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Resolved
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 Public Notification requested1 linked violation
January 10, 2003State Violation/Reminder Notice1 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
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 Violation/Reminder Notice1 linked violation
January 24, 1998State Public Notification requested1 linked violation
January 6, 1998State Compliance achieved2 linked violations
August 23, 1997State Public Notification requested1 linked violation
August 23, 1997State Violation/Reminder Notice1 linked violation
January 25, 1997State Public Notification requested1 linked violation
January 25, 1997State Violation/Reminder Notice1 linked violation
January 15, 1997State Public Notification received1 linked violation
November 23, 1996State Violation/Reminder Notice2 linked violations
November 23, 1996State Public Notification requested2 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 Violation/Reminder Notice1 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
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 Public Notification requested1 linked violation
October 4, 1992State Violation/Reminder Notice1 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 Violation/Reminder Notice1 linked violation
March 8, 1992State Public Notification requested1 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
February 27, 1991State Public Notification received5 linked violations
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 15, 1989State Public Notification received3 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

Common questions

Is DIAMOND required to publish a Consumer Confidence Report?: Yes. DIAMOND is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is DIAMOND’s next Consumer Confidence Report due?: DIAMOND’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does DIAMOND have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for DIAMOND.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

KERNC, TERESA

815-634-8149

DIAMOND, IL 60416