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EPA SDWIS High-volume analyte

LASSO in Drinking Water

9,044 public water systems carry at least one LASSO violation - wide footprint (> 8,691 systems).

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EPA contaminant code: 2051

Total Violations
49,306
Systems Affected
9,044
Health-Based %
0%
Violations / System
5.5

LASSO standing, high-volume SDWIS third

LASSO sits in the upper third of this extract by raw violation count (49,306), 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 sits mid-pack at 5.5 violations per affected system (mid load (≤ 5.8 violations per affected system)). None of the recorded LASSO violations in this extract are classified health-based; the trail is procedural. Among 157 indexable contaminants, this page is #52 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

2,4-D (49,369) Chromium (49,133) Mercury (49,728) Simazine (48,645)

Nearest by systems affected

Antimony, Total (8,855 systems) LEAD AND COPPER RULE REVISIONS (9,285 systems) Thallium, Total (8,780 systems) Endrin (9,348 systems)

LASSO: monitoring/reporting trail

0% health-based · 100.0% monitoring/reporting across 49,306 records.

Health-based (0%) Monitoring/Reporting (100.0%)

Most Affected Water Systems

System State Violations Population
Pinnacle Water Association WV 188 85
Salem Heights Estate PA 159 62
Congregation Ohr Menachem PA 149 30
Coal Mountain Water WV 149 80
Warminster Municipal Authority PA 131 40,000
Lewis Co Water Dist #2 WA 126 1,983
Skyview Estates IL 124 56
Prague OK 117 2,395
Marble Water System WA 105 94
Frankfort Psd WV 100 6,747
Ambler Boro Water Dept PA 94 20,000
Dabob Cove Community WA 94 24
27 Maple Drive CT 88 38
PA American Audubon PA 85 8,200
Ft Madison Muni Water Works IA 80 11,087
Aqua PA Sun Valley PA 79 120
Vista del Rio Mobile Home Park WA 75 352
Neshaminy Manor Center PA 74 2,100
Springhill Park Subdivision MT 72 90
Christ Mission Lutheran Church IL 70 150
Helena RV and Mobile Home Park MT 66 250
Save a Pet IL 64 50
Oilton OK 64 1,435
Seneca Trail Christian Academy WV 64 100
Malta City Of MT 63 1,800
Congregation Beth Judea IL 62 25
Paradise Stream Resor PA 60 774
Lewis River Golf Course WA 60 300
Indian Creek Valley Water Auth PA 58 7,000
Taleem Ul Haq IL 56 100

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.