NAUVOO, IL · Hancock County

NAUVOO 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): IL0670500
System type: Community Water System
Population served: 1,200
Service connections: 682
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monitoring and Reporting (DBP)
—
Chloramine
May 1, 2025 – May 31, 2025
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
May 1, 2025 – May 31, 2025
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 11, 2024 – September 25, 2024
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
October 1, 2023 – December 31, 2023
Resolved
Monitoring, Regular
—
Toxaphene
April 1, 2023 – June 30, 2023
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2021 – July 21, 2021
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
July 1, 2010 – June 22, 2011
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2009 – June 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2009 – March 31, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2008 – December 31, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2008 – September 30, 2008
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
June 1, 2008 – June 30, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2008 – June 30, 2008
Resolved
Monitoring and Reporting (DBP)
—
Chloramine
April 1, 2008 – June 30, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Aldicarb sulfone
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Aldicarb
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
LASSO
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Chlordane
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Endrin
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Dalapon
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Diquat
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Endothall
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Simazine
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2008 – June 30, 2008
Resolved
Monitoring, Regular
—
Picloram
January 1, 2008 – June 30, 2008
Resolved
Monitoring and Reporting (DBP)
—
Chloramine
July 1, 2007 – September 19, 2007
Resolved
Monitoring and Reporting (DBP)
—
Chloramine
April 1, 2007 – June 30, 2007
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 2006 – October 31, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
September 1, 2006 – September 30, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
August 1, 2006 – August 31, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
July 1, 2006 – July 31, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
May 1, 2006 – May 31, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
January 1, 2006 – January 31, 2006
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
June 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2004 – December 31, 2004
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 1995 – August 31, 1995
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
May 1, 1994 – May 31, 1994
Archived
Public Education
Health-based
Lead and Copper Rule
January 1, 1994 – February 10, 1995
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
February 1, 1991 – February 28, 1991
Archived
Monitoring, Regular
—
Barium
June 25, 1979 – June 24, 1980
Archived
Monitoring, Regular
—
Chromium
June 25, 1979 – June 24, 1980
Archived
Monitoring, Regular
—
Mercury
June 25, 1979 – June 24, 1980
Archived
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
May 1, 2025 – May 31, 2025	Monitoring and Reporting (DBP)	Chloramine	—	Resolved
May 1, 2025 – May 31, 2025	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 11, 2024 – September 25, 2024	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 1, 2023 – December 31, 2023	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
April 1, 2023 – June 30, 2023	Monitoring, Regular	Toxaphene	—	Resolved
July 1, 2021 – July 21, 2021	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2010 – June 22, 2011	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
April 1, 2009 – June 30, 2009	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
January 1, 2009 – March 31, 2009	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
October 1, 2008 – December 31, 2008	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
July 1, 2008 – September 30, 2008	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
June 1, 2008 – June 30, 2008	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
April 1, 2008 – June 30, 2008	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 1, 2008 – June 30, 2008	Monitoring and Reporting (DBP)	Chloramine	—	Resolved
April 1, 2008 – June 30, 2008	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Aldicarb sulfone	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Aldicarb	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	LASSO	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Endrin	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Dalapon	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Diquat	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Endothall	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Simazine	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2008 – June 30, 2008	Monitoring, Regular	Picloram	—	Resolved
July 1, 2007 – September 19, 2007	Monitoring and Reporting (DBP)	Chloramine	—	Resolved
April 1, 2007 – June 30, 2007	Monitoring and Reporting (DBP)	Chloramine	—	Resolved
October 1, 2006 – October 31, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
September 1, 2006 – September 30, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
August 1, 2006 – August 31, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
July 1, 2006 – July 31, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
May 1, 2006 – May 31, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
January 1, 2006 – January 31, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
June 1, 2005 – June 30, 2005	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Arsenic	—	Resolved
August 1, 1995 – August 31, 1995	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
May 1, 1994 – May 31, 1994	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
January 1, 1994 – February 10, 1995	Public Education	Lead and Copper Rule	Health-based	Resolved
February 1, 1991 – February 28, 1991	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
June 25, 1979 – June 24, 1980	Monitoring, Regular	Barium	—	Archived
June 25, 1979 – June 24, 1980	Monitoring, Regular	Chromium	—	Archived
June 25, 1979 – June 24, 1980	Monitoring, Regular	Mercury	—	Archived
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

August 22, 2025State Violation/Reminder Notice1 linked violation
August 22, 2025State Public Notification requested1 linked violation
August 22, 2025State Violation/Reminder Notice1 linked violation
August 22, 2025State Public Notification requested1 linked violation
June 30, 2025State Compliance achieved2 linked violations
October 1, 2024State Public Notification received1 linked violation
October 1, 2024State Public Notification received1 linked violation
September 25, 2024State Compliance achieved1 linked violation
August 22, 2024State Violation/Reminder Notice1 linked violation
July 8, 2024State Compliance achieved1 linked violation
January 3, 2024State Compliance achieved1 linked violation
December 12, 2023State Public Notification requested1 linked violation
December 12, 2023State Violation/Reminder Notice1 linked violation
July 11, 2023State Public Notification requested1 linked violation
July 11, 2023State Violation/Reminder Notice1 linked violation
July 22, 2021State Violation/Reminder Notice1 linked violation
July 21, 2021State Compliance achieved1 linked violation
June 22, 2011State Compliance achieved1 linked violation
October 6, 2010State Violation/Reminder Notice1 linked violation
September 30, 2009State Compliance achieved5 linked violations
August 28, 2009State Public Notification received1 linked violation
June 16, 2009State Violation/Reminder Notice1 linked violation
June 16, 2009State Public Notification requested1 linked violation
April 9, 2009State Public Notification received1 linked violation
March 25, 2009State Public Notification requested1 linked violation
March 25, 2009State Violation/Reminder Notice1 linked violation
January 7, 2009State Public Notification received1 linked violation
December 17, 2008State Public Notification requested1 linked violation
December 17, 2008State Violation/Reminder Notice1 linked violation
November 19, 2008State Bilateral Compliance Agreement signed6 linked violations
November 5, 2008State Public Notification received1 linked violation
October 16, 2008State Violation/Reminder Notice1 linked violation
October 16, 2008State Public Notification requested1 linked violation
October 10, 2008State Compliance achieved1 linked violation
September 11, 2008State Violation/Reminder Notice1 linked violation
September 3, 2008State Compliance achieved1 linked violation
September 3, 2008State Public Notification received2 linked violations
August 4, 2008State Compliance achieved31 linked violations
July 28, 2008State Formal Notice of Violation issued6 linked violations
July 23, 2008State Compliance achieved2 linked violations
July 17, 2008State Violation/Reminder Notice1 linked violation
July 17, 2008State Violation/Reminder Notice31 linked violations
July 17, 2008State Violation/Reminder Notice1 linked violation
July 16, 2008State Public Notification received1 linked violation
July 15, 2008State Violation/Reminder Notice1 linked violation
July 15, 2008State Public Notification requested1 linked violation
July 15, 2008State Violation/Reminder Notice1 linked violation
July 15, 2008State Public Notification requested1 linked violation
September 19, 2007State Compliance achieved1 linked violation
September 17, 2007State Violation/Reminder Notice1 linked violation
July 30, 2007State Compliance achieved1 linked violation
July 18, 2007State Public Notification requested1 linked violation
July 18, 2007State Violation/Reminder Notice1 linked violation
January 23, 2007State Public Notification received7 linked violations
January 3, 2007State Public Notification requested2 linked violations
January 3, 2007State Violation/Reminder Notice1 linked violation
January 2, 2007State Public Notification requested1 linked violation
January 2, 2007State Violation/Reminder Notice1 linked violation
January 2, 2007State Violation/Reminder Notice1 linked violation
January 2, 2007State Public Notification requested1 linked violation
January 2, 2007State Violation/Reminder Notice1 linked violation
January 2, 2007State Public Notification requested1 linked violation
December 18, 2006State Compliance achieved12 linked violations
September 27, 2006State Public Notification received11 linked violations
September 11, 2006State Violation/Reminder Notice1 linked violation
September 11, 2006State Violation/Reminder Notice3 linked violations
September 11, 2006State Public Notification requested1 linked violation
July 18, 2006State Compliance achieved1 linked violation
July 11, 2006State Bilateral Compliance Agreement signed12 linked violations
July 11, 2006State Violation/Reminder Notice1 linked violation
June 20, 2006State Public Notification received6 linked violations
June 5, 2006State Formal Notice of Violation issued13 linked violations
June 2, 2006State Violation/Reminder Notice1 linked violation
June 2, 2006State Public Notification requested1 linked violation
June 2, 2006State Violation/Reminder Notice1 linked violation
June 2, 2006State Public Notification requested1 linked violation
June 2, 2006State Violation/Reminder Notice1 linked violation
June 2, 2006State Violation/Reminder Notice1 linked violation
June 2, 2006State Public Notification requested1 linked violation
July 13, 2005State Compliance achieved3 linked violations
March 30, 2005State Compliance achieved12 linked violations
February 14, 2005State Public Notification requested12 linked violations
February 14, 2005State Violation/Reminder Notice12 linked violations
December 31, 1999State Compliance achieved1 linked violation
November 22, 1999State Compliance achieved2 linked violations
January 1, 1997State Public Notification received1 linked violation
November 23, 1996State Violation/Reminder Notice1 linked violation
November 23, 1996State Public Notification requested1 linked violation
October 28, 1995State Violation/Reminder Notice1 linked violation
October 28, 1995State Public Notification requested1 linked violation
February 10, 1995State Compliance achieved1 linked violation
July 23, 1994State Public Notification requested1 linked violation
July 23, 1994State Violation/Reminder Notice1 linked violation
July 23, 1994State Violation/Reminder Notice1 linked violation
April 4, 1991State Public Notification requested1 linked violation
October 8, 1989State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
January 7, 1989State Violation/Reminder Notice2 linked violations
January 7, 1989State Public Notification requested1 linked violation

Contact

MCGHGHY, CAROL

217-753-2587

NAUVOO, IL 62354