COLO, IA · Story County

COLO 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): IA8520061
System type: Community Water System
Population served: 853
Service connections: 362
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2016 – July 31, 2016
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 2015 – June 30, 2015
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
July 1, 1989 – June 30, 1993
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2016 – July 31, 2016	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
June 1, 2015 – June 30, 2015	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 1989 – June 30, 1993	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

July 28, 2017State Compliance achieved2 linked violations
November 9, 2016State Public Notification received2 linked violations
November 9, 2016State Public Notification received2 linked violations
September 20, 2016State Public Notification requested4 linked violations
September 20, 2016State Formal Notice of Violation issued2 linked violations
March 1, 2016State Public Notification received5 linked violations
July 30, 2015State Public Notification requested7 linked violations
September 29, 1998State Compliance achieved1 linked violation
April 20, 1998State Public Notification requested2 linked violations
March 4, 1998State Compliance achieved1 linked violation
June 5, 1996State Compliance achieved1 linked violation
August 20, 1993State Formal Notice of Violation issued10 linked violations
August 20, 1993State Public Notification requested2 linked violations
February 1, 1987State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
February 1, 1987State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
March 1, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record
February 16, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record

Contact

COLO WATER SUPPLY

641-377-2238

COLO, IA 50056