ROCK VALLEY, IA · Sioux County

ROCK VALLEY WATER SUPPLY 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): IA8482096
System type: Community Water System
Population served: 4,059
Service connections: 1,520
Ownership: local government
Water source: groundwater (wells)

Violation history

Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
May 1, 2000 – May 31, 2000
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
June 1, 1999 – June 30, 1999
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
September 1, 1998 – September 30, 1998
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 1991 – January 31, 1991
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
January 1, 1988 – March 31, 1988
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
May 1, 2000 – May 31, 2000	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
June 1, 1999 – June 30, 1999	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
September 1, 1998 – September 30, 1998	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Resolved
January 1, 1991 – January 31, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 1988 – March 31, 1988	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

June 12, 2025State Public Notification received2 linked violations
June 12, 2025State Public Notification received2 linked violations
October 18, 2024State Formal Notice of Violation issued3 linked violations
October 18, 2024State Formal Notice of Violation issued2 linked violations
October 4, 2002State Public Notification received4 linked violations
August 14, 2002State Public Notification requested11 linked violations
October 15, 2001State Compliance achieved7 linked violations
June 11, 2001State Compliance achieved5 linked violations
May 24, 2001State Bilateral Compliance Agreement signed2 linked violations
May 24, 2001State Bilateral Compliance Agreement signed2 linked violations
May 12, 2000State Formal Notice of Violation issued5 linked violations
December 9, 1999State Public Notification requested3 linked violations
December 9, 1999State Formal Notice of Violation issued4 linked violations
October 25, 1999State Violation/Reminder Notice4 linked violations
June 16, 1999State Public Notification requested2 linked violations
June 14, 1999State Public Notification requested4 linked violations
June 14, 1999State Formal Notice of Violation issued3 linked violations
June 14, 1999State Compliance achieved3 linked violations
October 17, 1997State Public Notification requested1 linked violation
May 12, 1997State Compliance achieved1 linked violation
August 21, 1995State Compliance achieved6 linked violations
December 1, 1994State Intentional no-action4 linked violations
March 26, 1991State Public Notification received1 linked violation
February 19, 1991State Compliance achieved2 linked violations
July 20, 1988State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
February 16, 1982State Unresolved1 linked violation

Contact

ROCK VALLEY WATER SUPPLY

712-470-1936

ROCK VALLEY, IA 51247