Surface Water Treatment Rule in Drinking Water
27.0 violations per affected system (165,477 across 6,127) - dense load (> 5.8 violations per affected system).
EPA contaminant code: 0200
Surface Water Treatment Rule standing, high-volume SDWIS third
Surface Water Treatment Rule sits in the upper third of this extract by raw violation count (165,477), so the national record is thick enough that system-level lists below are a sample of a much larger compliance trail rather than a near-complete inventory. Load is concentrated: 27.0 violations per affected system (dense load (> 5.8 violations per affected system)), which usually means repeat findings on the same PWSIDs rather than one-off detections spread thin. Health-based share is 41.1% - a material slice of the record is exposure-relevant, with the rest monitoring or reporting. Among 157 indexable contaminants, this page is #12 by violation volume. Utilities listed below are ranked by cumulative violation count for this analyte; pair that with population served to gauge household exposure scale.
Nationwide similar contaminants
Nearest by violation volume
Surface Water Treatment Rule: mixed health vs monitoring split
41.1% health-based · 58.9% monitoring/reporting across 165,477 records.
Most Affected Water Systems
Context: understanding water quality data · is my water safe?
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the EPA Safe Drinking Water Information System (SDWIS). Consult a qualified professional before making decisions based on this data.
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Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.