Public Water Partners

CALLAO, MO · Macon County

CALLAO PWS Water System

Consumer Confidence Report status

CALLAO PWS must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for CALLAO PWS.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Missouri’s official records. Always confirm current status with Missouri before making decisions based on this information.

System facts

System ID (PWSID)
MO2010125
System type
Community Water System
Population served
248
Service connections
146
Ownership
local government
Water source
surface water (rivers, lakes, or reservoirs)

CALLAO PWS is one of 1,412 community water systems in Missouri in the 500 or fewer people size category, serving 248 people from surface water.

As of August 1, 2026, its federal record holds 9 entries between 2015 and 2025, all of which EPA lists as closed.

Of the 9, 7 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Total Coliform Rules, the Public Notice Rule and Revised PN Rule, and the Stage 2 Disinfectants and Disinfection Byproducts Rule.

Violation history

  • Monitoring, Routine (RTCR)

    —

    Revised Total Coliform Rule

    June 1, 2025 – June 30, 2025

    Resolved

  • Lead Consumer Notice

    —

    Lead and Copper Rule

    October 1, 2024 – April 28, 2025

    Resolved

  • Public Notification Violation for NPDWR Violation

    —

    Public Notice

    December 14, 2023 – March 27, 2024

    Resolved

  • Public Notification Violation for NPDWR Violation

    —

    Public Notice

    October 1, 2023 – March 27, 2024

    Resolved

  • Monitoring, Routine (RTCR)

    —

    Revised Total Coliform Rule

    April 1, 2023 – April 30, 2023

    Resolved

  • Monitoring, Routine (RTCR)

    —

    Revised Total Coliform Rule

    August 1, 2022 – August 31, 2022

    Resolved

  • Monitoring and Reporting (DBP)

    —

    Total Haloacetic Acids (HAA5)

    January 1, 2022 – December 31, 2022

    Resolved

  • Monitoring and Reporting (DBP)

    —

    TTHM

    January 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    October 1, 2015 – October 31, 2015

    Resolved

Resolved addressed and confirmed by the state

Enforcement actions

No enforcement actions on record for this system.

Common questions

Is CALLAO PWS required to publish a Consumer Confidence Report?

Yes. CALLAO PWS is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is CALLAO PWS’s next Consumer Confidence Report due?

CALLAO PWS’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does CALLAO PWS have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for CALLAO PWS.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

SUMMERS, SUZANNE

660-346-9860

CALLAO, MO 63534-0000