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EPA SDWIS High-volume analyte Dense per-system load

Fluoride in Drinking Water

5.8 violations per affected system (78,347 across 13,411) - dense load (> 5.8 violations per affected system).

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EPA contaminant code: 1025

Total Violations
78,347
Systems Affected
13,411
Health-Based %
36.1%
Violations / System
5.8

Fluoride standing, high-volume SDWIS third

Fluoride sits in the upper third of this extract by raw violation count (78,347), 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: 5.8 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 36.1% - a material slice of the record is exposure-relevant, with the rest monitoring or reporting. Among 157 indexable contaminants, this page is #39 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

Xylenes, Total (79,013) Vinyl chloride (76,766) Nitrite (72,418) Interim Enhanced Surface Water Treatment Rule (72,147)

Nearest by systems affected

Chromium (13,419 systems) Barium (13,488 systems) Mercury (13,488 systems) Cadmium (13,518 systems)

Fluoride: mixed health vs monitoring split

36.1% health-based · 63.9% monitoring/reporting across 78,347 records.

Health-based (36.1%) Monitoring/Reporting (63.9%)

Most Affected Water Systems

System State Violations Population
City of Wolfforth TX 1,090 9,600
Deer Run VA 954 104
Rescue Waterworks VA 897 203
City of Seagraves TX 786 2,417
Seven Estates TX 778 189
Plott Acres TX 732 204
Three Springs Farm OK 730 89
Stormlight Mobile Home Park TX 606 76
City of Wellman TX 593 200
City of Smyer TX 539 474
City of Opdyke West TX 490 220
City of New Home TX 479 965
Seven Estates TX 476 189
Borden County Water System TX 474 275
Willing Workers Club VA 473 31
114th Street Mobile Home Park TX 445 42
Lordsburg Water Supply System NM 441 3,213
Cswr Southwest Garden Water TX 436 324
City of Ropesville TX 423 434
Town North Estates TX 412 216
Whitharral WSC TX 410 200
City of Plains TX 395 1,355
San Simon Dwid AZ 387 312
Grassland WSC TX 387 55
Cox Addition Water System TX 381 114
Howard Water Coop TX 371 117
Terrells Mobile Home Park TX 364 60
Loop WSC TX 360 300
City of Andrews TX 339 14,109
Sdm Water Association AR 301 520

Context: understanding water quality data · is my water safe?

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

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.

Read our methodology - how this data is sourced, computed, and verified.

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.