Municipal Water System Compliance Audit Checklist [FREE PDF]

Municipal water systems are subject to rigorous federal and state compliance requirements under the Safe Drinking Water Act (SDWA, 42 U.S.C. 300f), EPA National Primary Drinking Water Regulations (40 CFR Part 141), and the Clean Water Act (33 U.S.C. 1251). Public water systems must conduct regular operational audits to ensure treatment efficacy, distribution integrity, monitoring accuracy, and worker safety. This checklist provides Public Works Directors and water system operators with a compreh

  • Industry: Public Works
  • Frequency: Quarterly
  • Estimated Time: 90-120 minutes
  • Role: Public Works Director
  • Total Items: 37
  • Compliance: EPA Safe Drinking Water Act, 42 U.S.C. 300f et seq., EPA 40 CFR Part 141 National Primary Drinking Water Regulations, EPA Clean Water Act, 33 U.S.C. 1251 (NPDES Permit Requirements), OSHA 29 CFR 1910.146 Permit-Required Confined Spaces, OSHA 29 CFR 1910.1200 Hazard Communication Standard (HazCom)

Source Water and Intake Assessment

Evaluate source water quality, intake conditions, and source water protection plan status.

  • Is the source water protection area (wellhead or watershed) secured and free of unauthorized access?
  • Are source water intake screens and strainers free of blockages, debris, or structural damage?
  • Has the most recent source water turbidity measurement been recorded and is it within permitted limits?
  • What is the current raw water turbidity reading at the intake?
  • Is the Source Water Assessment and Protection (SWAP) plan current, reviewed within the past 5 years?

Treatment Process and Chemical Operations

Audit chemical dosing, treatment processes, and operational parameters for regulatory compliance.

  • Are all chemical feed systems (coagulant, disinfectant, pH adjustment) operational and within set-point ranges?
  • Is the chlorine or disinfectant residual at the point of entry within the EPA-required range (0.2–4.0 mg/L free chlorine)?
  • What is the current disinfectant residual (chlorine) at the entry point?
  • Are chemical storage areas properly labeled, ventilated, and secondary containment structures intact?
  • Are filter effluent turbidity levels measured continuously and within the 0.3 NTU standard?
  • What is the current treated water pH level at point of entry?

Distribution System Integrity

Assess pipe conditions, pressure zones, storage tanks, and backflow prevention in the distribution network.

  • Is system water pressure maintained at a minimum of 20 psi throughout the distribution system?
  • Are all storage tanks and reservoirs inspected for sediment, algae, structural integrity, and security?
  • Are backflow prevention devices installed, tested within the past 12 months, and documented?
  • Is the flushing program for dead-end mains current and documented per the system's O&M plan?
  • Are there any known main breaks, leaks, or pressure anomalies currently under repair or investigation?
  • Describe any active distribution system deficiencies, repairs in progress, or boil-water advisories?

Monitoring, Sampling, and Reporting Compliance

Verify that all required monitoring, laboratory analysis, and regulatory reporting are current and complete.

  • Is the current monitoring schedule for Total Coliform Rule sampling being followed per the approved monitoring plan?
  • Are Lead and Copper Rule (LCR) tap sampling results current and within action levels (Pb <15 ppb, Cu <1.3 ppm)?
  • Has the annual Consumer Confidence Report (CCR) been submitted to EPA and distributed to customers on time?
  • Are all Tier 1 and Tier 2 public notification requirements up to date with no outstanding violations?
  • Are laboratory certifications for all contracted or in-house testing labs current and state-approved?

Worker Safety and Confined Space Program

Evaluate compliance with OSHA confined space, hazard communication, and PPE requirements for water system workers.

  • Are all permit-required confined spaces (manholes, pump vaults, tanks) identified, labeled, and permitted?
  • Is atmospheric testing equipment (O2, LEL, H2S monitors) calibrated, available, and used prior to confined space entry?
  • Are Safety Data Sheets (SDS) current, accessible, and reviewed with employees for all chemicals used?
  • Is required PPE (chemical-resistant gloves, eye protection, respiratory protection) available and in good condition?
  • Have all water system operators completed required state-certified operator training and license renewal?

Emergency Response and Physical Security

Assess emergency response planning, vulnerability assessment status, and physical security of critical infrastructure.

  • Is the current Emergency Response Plan (ERP) updated, tested within the past 12 months, and filed with the state?
  • Is the facility perimeter secured with functioning locks, fencing, and access control to prevent unauthorized entry?
  • Are SCADA and control systems protected with current cybersecurity measures per WaterISAC recommendations?
  • Is a current mutual aid agreement in place with neighboring utilities or the state for emergency water supply?
  • Are backup power systems (generators) tested monthly and capable of sustaining critical operations during outages?

Wastewater and NPDES Discharge Compliance

Review compliance with wastewater discharge permits, effluent monitoring, and Clean Water Act obligations.

  • Is the current NPDES permit valid, not expired, and posted at the facility?
  • Are all effluent discharge parameters (BOD, TSS, pH, chlorine residual) within NPDES permit limits?
  • Are Discharge Monitoring Reports (DMRs) submitted to EPA/state on schedule with no missed reporting periods?
  • Is the biosolids management plan current and compliant with EPA 40 CFR Part 503 land application standards?
  • Provide an overall audit summary including outstanding violations, corrective actions, and recommended improvements?

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Why Use This Municipal Water System Compliance Audit Checklist [FREE PDF]?

This municipal water system compliance audit checklist [free pdf] helps public works teams maintain compliance and operational excellence. Designed for public works director professionals, this checklist covers 37 critical inspection points across 7 sections. Recommended frequency: quarterly.

Ensures compliance with EPA Safe Drinking Water Act, 42 U.S.C. 300f et seq., EPA 40 CFR Part 141 National Primary Drinking Water Regulations, EPA Clean Water Act, 33 U.S.C. 1251 (NPDES Permit Requirements), OSHA 29 CFR 1910.146 Permit-Required Confined Spaces, OSHA 29 CFR 1910.1200 Hazard Communication Standard (HazCom). Regulatory-aligned for audit readiness and inspection documentation.

Frequently Asked Questions

What does the Municipal Water System Compliance Audit Checklist [FREE PDF] cover?

This checklist covers 37 inspection items across 7 sections: Source Water and Intake Assessment, Treatment Process and Chemical Operations, Distribution System Integrity, Monitoring, Sampling, and Reporting Compliance, Worker Safety and Confined Space Program, Emergency Response and Physical Security, Wastewater and NPDES Discharge Compliance. It is designed for public works operations and compliance.

How often should this checklist be completed?

This checklist should be completed quarterly. Each completion takes approximately 90-120 minutes.

Who should use this Municipal Water System Compliance Audit Checklist [FREE PDF]?

This checklist is designed for Public Works Director professionals in the public works industry. It can be used for self-assessments, team audits, and regulatory compliance documentation.

Can I download this checklist as a PDF?

Yes, this checklist is available as a free PDF download. You can also use it digitally in the POPProbe mobile app for real-time data capture, photo documentation, and automatic reporting.

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