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EPA SDWIS High-volume analyte Dense per-system load

Carbon tetrachloride in Drinking Water

6.5 violations per affected system (95,413 across 14,788) - dense load (> 5.8 violations per affected system).

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EPA contaminant code: 2982

Total Violations
95,413
Systems Affected
14,788
Health-Based %
0.5%
Violations / System
6.5

Carbon tetrachloride standing, high-volume SDWIS third

Carbon tetrachloride sits in the upper third of this extract by raw violation count (95,413), 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: 6.5 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 only 0.5% - almost all of this analyte's trail is monitoring/reporting rather than MCL exceedance. Among 157 indexable contaminants, this page is #21 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

1,1-Dichloroethylene (95,371) 1,1,1-Trichloroethane (94,855) p-Dichlorobenzene (94,834) 1,2-Dichloroethane (94,715)

Nearest by systems affected

Gross Alpha, Excl. Radon and U (14,784 systems) Trichloroethylene (14,829 systems) Benzene (14,910 systems) Tetrachloroethylene (14,507 systems)

Carbon tetrachloride: mixed health vs monitoring split

0.5% health-based · 99.5% monitoring/reporting across 95,413 records.

Health-based (0.5%) Monitoring/Reporting (99.5%)

Most Affected Water Systems

System State Violations Population
Lake Forest Park Water District WA 475 3,171
Timber Creek MHP East & West OK 362 40
Satsop Business Park WA 266 544
Seven Estates TX 264 189
Eastside MHP OK 224 32
Pinnacle Water Association WV 203 85
Carmel Montessori Academy IL 181 40
Garber Municipal Authority OK 167 725
Cobbs Lake Preserve PA 154 200
Congregation Ohr Menachem PA 147 30
Kelley Crest WA 147 45
Coal Mountain Water WV 146 80
Skyview Estates IL 135 56
Windmill Estates IL 124 65
Franklin Water Systems 3 TX 113 201
Tel Company 3 WA 107 75
Marble Water System WA 102 94
Tempo Lake Water Co WA 102 246
Imagination Station Academy, LLC NC 101 35
Nottingham Manor M H Court PA 100 473
Walnut Cove, Town Of NC 97 2,210
Dabob Cove Community WA 94 24
PA American Audubon PA 91 8,200
Willow Springs MHP IN 90 25
Robinwood Village PA 90 70
Roche Harbor Water System Inc WA 87 1,985
27 Maple Drive CT 85 38
Kuzmanich Water System WA 85 45
Sapphire Lakes Development NC 84 724
Quaker Creek Store NY 84 100

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.