Water systems subject to PFAS regulations under the Safe Drinking Water Act (SDWA) and state-level rules must maintain comprehensive documentation to demonstrate ongoing compliance. Compliance managers should establish document control systems that support both routine regulatory reporting and potential enforcement inquiries or litigation.
Monitoring Records and Chain of Custody
All PFAS monitoring results must be traceable to accredited laboratory analyses with documented chain of custody from sample collection through final reporting. Records should include sample collection logs (date, time, location, collector name), field blanks and trip blanks, laboratory QA/QC documentation, and the final certified analytical report.
Monitoring schedules under EPA’s PFAS NPDWR require quarterly sampling for systems above the MCL trigger and annual sampling for compliant systems. Maintain a compliance calendar that tracks upcoming sampling dates, laboratory submission deadlines, and reporting deadlines to your primacy agency. Missed monitoring is a separate violation from an MCL exceedance and can compound enforcement exposure.
Treatment System Records and Public Notification Files
If your system has installed PFAS treatment, maintain records of treatment system design specifications, commissioning test results, ongoing effluent monitoring, media replacement logs, and vendor service reports. These records substantiate that the treatment system is operating as designed and provide early warning if performance degrades.
Public notification obligations are triggered when MCLs are exceeded. Maintain copies of all public notification materials, distribution lists, delivery confirmation records (mail receipts, email delivery logs, newspaper publication affidavits), and any consumer confidence report addenda. State agencies may audit notification compliance, and gaps in delivery documentation can result in additional violations.
A well-organized compliance file — structured by monitoring period, contaminant, and regulatory citation — reduces response time during inspections and provides the evidentiary foundation needed if your system seeks a variance, enforcement compliance schedule, or legal defense.