SOLON, IA · Johnson County

TWIN VALLEY LAKES IMPROVEMENT ASSN 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 Iowa’s official records. Always confirm current status with Iowa before making decisions based on this information.

System facts

System ID (PWSID): IA5200861
System type: Community Water System
Population served: 100
Service connections: 40
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Monitoring and Reporting (DBP)
—
TTHM
July 1, 2025 – July 31, 2025
Archived
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2025 – July 31, 2025
Archived
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2022 – September 12, 2022
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2021 – September 12, 2022
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
December 1, 2018 – April 4, 2019
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
January 1, 2012 – January 31, 2012
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2009 – September 30, 2009
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 2008 – July 31, 2008
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2004 – August 31, 2004
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1995 – September 30, 1995
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
April 1, 1993 – April 30, 1993
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 1991 – April 7, 1992
Resolved
Monitoring, Regular
—
Cadmium
October 1, 1988 – September 30, 1991
Resolved
Monitoring, Regular
—
Chromium
October 1, 1988 – September 30, 1991
Resolved
Monitoring, Regular
—
Fluoride
October 1, 1988 – September 30, 1991
Resolved
Monitoring, Regular
—
Mercury
October 1, 1988 – September 30, 1991
Resolved
Monitoring, Regular
—
Selenium
October 1, 1988 – September 30, 1991
Resolved
Monitoring, Regular
—
Barium
October 1, 1988 – September 30, 1991
Resolved
Monitoring, Regular
—
Arsenic
October 1, 1988 – September 30, 1991
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
October 1, 1987 – September 30, 1991
Resolved
Monitoring, Regular
—
Nitrate
October 1, 1985 – September 30, 1988
Resolved

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
July 1, 2025 – July 31, 2025	Monitoring and Reporting (DBP)	TTHM	—	Archived
July 1, 2025 – July 31, 2025	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Archived
July 1, 2022 – September 12, 2022	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2021 – September 12, 2022	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
December 1, 2018 – April 4, 2019	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2012 – January 31, 2012	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
September 1, 2009 – September 30, 2009	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2008 – July 31, 2008	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2004 – August 31, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 1995 – September 30, 1995	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
April 1, 1993 – April 30, 1993	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 1991 – April 7, 1992	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
October 1, 1988 – September 30, 1991	Monitoring, Regular	Cadmium	—	Resolved
October 1, 1988 – September 30, 1991	Monitoring, Regular	Chromium	—	Resolved
October 1, 1988 – September 30, 1991	Monitoring, Regular	Fluoride	—	Resolved
October 1, 1988 – September 30, 1991	Monitoring, Regular	Mercury	—	Resolved
October 1, 1988 – September 30, 1991	Monitoring, Regular	Selenium	—	Resolved
October 1, 1988 – September 30, 1991	Monitoring, Regular	Barium	—	Resolved
October 1, 1988 – September 30, 1991	Monitoring, Regular	Arsenic	—	Resolved
October 1, 1987 – September 30, 1991	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
October 1, 1985 – September 30, 1988	Monitoring, Regular	Nitrate	—	Resolved

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

Enforcement actions

September 22, 2025State Public Notification requested1 linked violation
September 22, 2025State Formal Notice of Violation issued1 linked violation
September 22, 2025State Formal Notice of Violation issued1 linked violation
September 22, 2025State Public Notification requested1 linked violation
September 12, 2022State Public Notification received1 linked violation
September 12, 2022State Public Notification received1 linked violation
September 12, 2022State Compliance achieved1 linked violation
September 12, 2022State Compliance achieved1 linked violation
August 21, 2022State Public Notification requested1 linked violation
August 21, 2022State Formal Notice of Violation issued1 linked violation
August 26, 2021State Formal Notice of Violation issued1 linked violation
June 30, 2021State Compliance achieved1 linked violation
June 29, 2021State Public Notification received1 linked violation
June 17, 2021State Public Notification received3 linked violations
February 3, 2021State Public Notification received1 linked violation
November 18, 2020State Formal Notice of Violation issued1 linked violation
November 18, 2020State Public Notification requested1 linked violation
January 15, 2020State Public Notification received1 linked violation
October 16, 2019State Formal Notice of Violation issued1 linked violation
October 16, 2019State Public Notification requested1 linked violation
October 7, 2019State Compliance achieved1 linked violation
April 4, 2019State Compliance achieved1 linked violation
January 28, 2019State Formal Notice of Violation issued1 linked violation
December 19, 2016State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
December 19, 2016State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
March 1, 2012State Public Notification received3 linked violations
February 16, 2012State Public Notification requested3 linked violations
January 19, 2005State Compliance achieved3 linked violations
January 19, 2005State Compliance achieved2 linked violations
August 6, 2004State Violation/Reminder Notice3 linked violations
July 8, 2004State Violation/Reminder Notice1 linked violation
March 22, 2004State Formal Notice of Violation issued2 linked violations
February 26, 2004State Compliance achieved5 linked violations
August 8, 2003State Formal Notice of Violation issued3 linked violations
July 23, 2002State Public Notification received2 linked violations
July 17, 2002State Formal Notice of Violation issued3 linked violations
July 10, 2002State Violation/Reminder Notice2 linked violations
July 10, 1995State Compliance achieved5 linked violations
August 5, 1993State Public Notification received6 linked violations
August 5, 1993State Public Notification received4 linked violations
August 5, 1993State Public Notification received2 linked violations
May 19, 1992State Public Notification received1 linked violation
May 19, 1992State Public Notification received2 linked violations
May 19, 1992State Public Notification received4 linked violations
May 19, 1992State Public Notification received3 linked violations
May 19, 1992State Public Notification received1 linked violation
May 19, 1992State Public Notification received2 linked violations
April 14, 1992State Administrative/Compliance Order with penalty issued1 linked violation
April 14, 1992State Administrative/Compliance Order with penalty issued1 linked violation
April 14, 1992State Administrative/Compliance Order with penalty issued1 linked violation
April 14, 1992State Administrative/Compliance Order with penalty issued10 linked violations
April 14, 1992State Administrative/Compliance Order with penalty issued1 linked violation
April 14, 1992State Administrative/Compliance Order with penalty issued3 linked violations
April 14, 1992State Administrative/Compliance Order with penalty issued7 linked violations
April 14, 1992State Administrative/Compliance Order with penalty issuedgeneral compliance action — not tied to a specific violation on record
April 13, 1992State Compliance achieved1 linked violation
April 13, 1992State Compliance achieved3 linked violations
April 7, 1992State Compliance achieved1 linked violation
April 7, 1992State Compliance achieved4 linked violations
April 7, 1992State Compliance achieved1 linked violation
April 7, 1992State Compliance achieved1 linked violation
April 7, 1992State Compliance achieved18 linked violations
April 7, 1992State Compliance achievedgeneral compliance action — not tied to a specific violation on record
April 7, 1992State Compliance achieved1 linked violation
April 7, 1992State Compliance achieved10 linked violations
March 24, 1992State Formal Notice of Violation issued4 linked violations
March 24, 1992State Formal Notice of Violation issued1 linked violation
March 24, 1992State Formal Notice of Violation issued2 linked violations
March 24, 1992State Public Notification requested2 linked violations
March 24, 1992State Formal Notice of Violation issued3 linked violations
March 24, 1992State Public Notification requested3 linked violations
March 24, 1992State Formal Notice of Violation issued3 linked violations
March 24, 1992State Public Notification requested1 linked violation
March 24, 1992State Formal Notice of Violation issued2 linked violations
March 24, 1992State Public Notification requested1 linked violation
March 24, 1992State Formal Notice of Violation issued1 linked violation
March 24, 1992State Formal Notice of Violation issued1 linked violation
March 24, 1992State Public Notification requested1 linked violation
March 24, 1992State Public Notification requested1 linked violation
March 24, 1992State Formal Notice of Violation issued1 linked violation
March 24, 1992State Public Notification requested1 linked violation
December 12, 1988State Formal Notice of Violation issued1 linked violation

Contact

TWIN VALLEY LAKES IMPROVEMENT ASSN

Phone not on record

SOLON, IA 52333-9324