Annual Compliance Report

Each year the department produces and submits to the U.S. Environmental Protection Agency (EPA) the Annual Compliance Report (ACR), an annual report on public water system violations.

The ACR must address violations of national primary drinking water regulations with respect to maximum contaminant levels, treatment techniques, significant monitoring requirements, variances and exemptions. Maximum contaminant level violations occur when a contaminant exceeds the maximum level allowed in drinking water. Monitoring violations occur when a system fails to perform required monitoring or fails to submit the monitoring by the deadline. Treatment technique violations occur when a water system fails to meet a specified treatment goal.

EPA summarizes and evaluates the annual state reports in an annual national report, which must also make recommendations concerning the resources needed to improve compliance with Safe Drinking Water Act.

The ACR differs from the Consumer Confidence Report, or CCR, in that the CCR is a report produced by the water system for their customers. The Annual Compliance Report is produced by the state for EPA.

Consumer Confidence Reports

Each year, by July 1, community water supplies are required to make Consumer Confidence Reports available to their customers. These reports enable Missourians to make knowledgeable decisions about their health and their environment and provide consumers with the following information:

  • The lake, river, aquifer, or other source of the drinking water
  • A brief summary of the susceptibility to contamination of the local drinking water source, based on the source water assessments
  • How to get a copy of the water system’s complete source water assessment
  • The level, or range of levels, of any contaminant found in local drinking water, as well as the federal health-based standard (maximum contaminant level) for comparison
  • The likely source of any contaminant in the local drinking water supply
  • Potential health effects of any contaminant detected in violation of health standards, and an accounting of the system’s actions to restore safe drinking water
  • The water system’s compliance with other drinking water-related rules
  • Educational information on nitrate, arsenic, or lead in areas where these contaminants are detected above 50% of federal standards
  • Phone numbers for additional sources of information

As part of our commitment to to public health protection and the public's right to know, the Department of Natural Resources is making it easier for community water systems to get their Consumer Confidence Reports into the the hands of their customers. 

Search Consumer Confidence Reports

Census of Missouri Public Water Systems

The annual Census of Missouri Public Water Systems provides detailed information regarding the volume, source water type, population and other characteristics of water systems. In addition, test results for selected chemicals are included along with the types of treatments used by Missouri water systems.

Chronic Violators

Learn more about drinking water systems that have chronically failed to do required bacteriological testing. The department requires all public water systems to test for bacteria at least once a month to verify that these systems are providing safe drinking water to the public.