COLO, IA · Story County

MCCALLSBURG 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): IA8552010
System type: Community Water System
Population served: 353
Service connections: 147
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2010 – July 31, 2010
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
April 1, 1990 – July 30, 1990
Resolved
Monitoring, Regular
—
Barium
July 1, 1987 – June 30, 1990
Resolved
Monitoring, Regular
—
Cadmium
July 1, 1987 – June 30, 1990
Resolved
Monitoring, Regular
—
Fluoride
July 1, 1987 – June 30, 1990
Resolved
Monitoring, Regular
—
Chromium
July 1, 1987 – June 30, 1990
Resolved
Monitoring, Regular
—
Arsenic
July 1, 1987 – June 30, 1990
Resolved
Monitoring, Regular
—
Mercury
July 1, 1987 – June 30, 1990
Resolved
Monitoring, Regular
—
Nitrate
October 1, 1984 – September 30, 1987
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Fluoride
October 1, 1983 – September 30, 1984
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
October 1, 1981 – September 30, 1982
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
July 1, 2010 – July 31, 2010	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 1990 – July 30, 1990	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 1987 – June 30, 1990	Monitoring, Regular	Barium	—	Resolved
July 1, 1987 – June 30, 1990	Monitoring, Regular	Cadmium	—	Resolved
July 1, 1987 – June 30, 1990	Monitoring, Regular	Fluoride	—	Resolved
July 1, 1987 – June 30, 1990	Monitoring, Regular	Chromium	—	Resolved
July 1, 1987 – June 30, 1990	Monitoring, Regular	Arsenic	—	Resolved
July 1, 1987 – June 30, 1990	Monitoring, Regular	Mercury	—	Resolved
October 1, 1984 – September 30, 1987	Monitoring, Regular	Nitrate	—	Resolved
October 1, 1983 – September 30, 1984	Maximum Contaminant Level Violation, Single Sample	Fluoride	Health-based	Archived
October 1, 1981 – September 30, 1982	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived

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

Enforcement actions

July 14, 2022State Violation/Reminder Notice1 linked violation
July 14, 2022State Formal Notice of Violation issued1 linked violation
July 14, 2022State Violation/Reminder Notice1 linked violation
July 14, 2022State Intentional no-action1 linked violation
July 14, 2022State Formal Notice of Violation issued1 linked violation
July 14, 2022State Intentional no-action1 linked violation
November 6, 2019State Formal Notice of Violation issued29 linked violations
November 6, 2019State Public Notification requested2 linked violations
November 6, 2019State Formal Notice of Violation issued1 linked violation
July 31, 2019State Compliance achieved2 linked violations
July 31, 2019State Compliance achieved1 linked violation
July 31, 2019State Compliance achieved1 linked violation
July 31, 2019State Compliance achieved1 linked violation
July 11, 2019State Public Notification received2 linked violations
December 21, 2018State Administrative/Compliance Order without penalty issued2 linked violations
October 17, 2018State Formal Notice of Violation issued4 linked violations
October 17, 2018State Public Notification requested2 linked violations
October 17, 2018State Formal Notice of Violation issued1 linked violation
October 17, 2018State Public Notification requested1 linked violation
January 16, 1992State Formal Notice of Violation issued1 linked violation
January 16, 1992State Public Notification requested2 linked violations
January 16, 1992State Formal Notice of Violation issued1 linked violation
December 12, 1991State Formal Notice of Violation issued1 linked violation
December 10, 1991State Compliance achieved3 linked violations
December 10, 1991State Compliance achieved1 linked violation
July 30, 1990State Compliance achieved3 linked violations
July 30, 1990State Compliance achieved6 linked violations
July 30, 1990State Compliance achieved1 linked violation
July 30, 1990State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 31, 1988State Formal Notice of Violation issued14 linked violations
September 30, 1984Federal issued Formal Notice of Violation1 linked violation

Contact

MC CALLSBURG WATER SUPPLY

515-460-4750

COLO, IA 50065