Checklist for Completing a Consumer Confidence Report

This checklist is meant as a reminder to include certain elements in your annual consumer confidence report (CCR)

This list is not exhaustive. There may be additional elements you need to include in your CCR, depending on your system's particular monitoring requirements. For the complete CCR requirements, see WAC 246-290 Part 7, Subpart B or the Environmental Protection Agency (EPA) guidance document entitled Preparing Your Drinking Water Consumer Confidence Report.

Water system information

  • Telephone number and name of water system contact person.
  • EPA's hotline number 1-800-426-4791.
  • Information about public participation opportunities.
  • Statements in non-English languages, if appropriate for your community, saying the report is about drinking water quality and suggesting that people seek help to read it.

Sources of water

  • Type, common name, and location of sources of water.
  • Information about the susceptibility of the sources to contamination, if available.


  • Regulatory standards: MCL, MCLG, MRDL, MRDLG, AL, TT, etc., as needed.
  • Concentration units: ppb, ppm, pCi/L, mg/L, etc., as needed.
  • Others as needed. All abbreviations and acronyms must be defined.

Detected contaminants in one or more tables

  • Summary of the results of your system's monitoring requirements (detected regulated and unregulated state and federal contaminants only).
    • MCL, MCLG, MRDL and MRDLG converted to a value greater than 1.0. Convert your system's detected result also.
    • Treatment technique or action level if there is no MCL or MRDL.
    • Compliance monitoring data in MCL or MRDL units, with the highest compliance level and range of sample results.
    • For coliforms, reporting varies (see regulation).
    • For lead and copper, 90th percentile value, and the number of sampled sites that exceeded the action level.
    • For turbidity, reporting varies (see regulation).
    • For unregulated contaminants, average and range of detections.
    • If monitoring is conducted less than once a year, include date of most recent sample, result, and statement that data is from most recent sampling.
  • Known or likely source of each detected contaminant.
  • MCL violations highlighted.

Elsewhere in the report

  • For primary MCL violations, health effects language and explanation.
  • Information on cryptosporidium, radon and other contaminants, if applicable.

Compliance with other drinking water regulations

  • Explanation of any violations, potential health effects, and steps taken to correct the violations. The most common violations include failure to monitor.
    • Failure to report and keep records of compliance data.
    • Failure to filter and disinfect, if required to do so.
    • Failure to control lead and copper, if required to do so.
  • Explanation of variance/exemption, if applicable.

Required educational information

  • Explanation of contaminants and their presence in drinking water.
  • Warning for vulnerable populations.
  • Informational statements on arsenic, nitrate, lead, and total trihalomethanes (TTHMs), if applicable.

Report delivery and record-keeping

  • Send report and certification to the DOH Drinking Water Regional Office for your system's county.
  • Send report and certification to arrive at DOH by July 1. Reports that reach DOH after July 1 are considered late, even if they are postmarked on July 1.
  • Send a copy of your report to all of your service connections.
  • Make a good faith effort to reach non-bill paying consumers (such as renters, apartment dwellers, students and workers).
  • Keep a copy of your certification and report for your records for three years.